diff --git a/docs/api-channel.md b/docs/api-channel.md
index 7d5a0319..75d6776e 100644
--- a/docs/api-channel.md
+++ b/docs/api-channel.md
@@ -42,7 +42,7 @@ Extract a single channel from a multi-channel image.
 
 ### Parameters
 
--   `channel` **([Number][1] \| [String][2])** zero-indexed band number to extract, or `red`, `green` or `blue` as alternative to `0`, `1` or `2` respectively.
+-   `channel` **([number][1] \| [string][2])** zero-indexed band number to extract, or `red`, `green` or `blue` as alternative to `0`, `1` or `2` respectively.
 
 ### Examples
 
@@ -75,7 +75,7 @@ For raw pixel input, the `options` object should contain a `raw` attribute, whic
 
 ### Parameters
 
--   `images` **([Array][4]<([String][2] \| [Buffer][5])> | [String][2] \| [Buffer][5])** one or more images (file paths, Buffers).
+-   `images` **([Array][4]<([string][2] \| [Buffer][5])> | [string][2] \| [Buffer][5])** one or more images (file paths, Buffers).
 -   `options` **[Object][6]** image options, see `sharp()` constructor.
 
 
@@ -89,7 +89,7 @@ Perform a bitwise boolean operation on all input image channels (bands) to produ
 
 ### Parameters
 
--   `boolOp` **[String][2]** one of `and`, `or` or `eor` to perform that bitwise operation, like the C logic operators `&`, `|` and `^` respectively.
+-   `boolOp` **[string][2]** one of `and`, `or` or `eor` to perform that bitwise operation, like the C logic operators `&`, `|` and `^` respectively.
 
 ### Examples
 
diff --git a/docs/api-colour.md b/docs/api-colour.md
index b792d519..bf9237eb 100644
--- a/docs/api-colour.md
+++ b/docs/api-colour.md
@@ -7,7 +7,7 @@ An alpha channel may be present and will be unchanged by the operation.
 
 ### Parameters
 
--   `rgb` **([String][1] \| [Object][2])** parsed by the [color][3] module to extract chroma values.
+-   `rgb` **([string][1] \| [Object][2])** parsed by the [color][3] module to extract chroma values.
 
 
 -   Throws **[Error][4]** Invalid parameter
@@ -46,7 +46,7 @@ By default output image will be web-friendly sRGB, with additional channels inte
 
 ### Parameters
 
--   `colourspace` **[String][1]?** output colourspace e.g. `srgb`, `rgb`, `cmyk`, `lab`, `b-w` [...][6]
+-   `colourspace` **[string][1]?** output colourspace e.g. `srgb`, `rgb`, `cmyk`, `lab`, `b-w` [...][6]
 
 
 -   Throws **[Error][4]** Invalid parameters
@@ -59,7 +59,7 @@ Alternative spelling of `toColourspace`.
 
 ### Parameters
 
--   `colorspace` **[String][1]?** output colorspace.
+-   `colorspace` **[string][1]?** output colorspace.
 
 
 -   Throws **[Error][4]** Invalid parameters
diff --git a/docs/api-operation.md b/docs/api-operation.md
index b4b62824..5a6d26e8 100644
--- a/docs/api-operation.md
+++ b/docs/api-operation.md
@@ -21,9 +21,9 @@ for example `rotate(x).extract(y)` will produce a different result to `extract(y
 
 ### Parameters
 
--   `angle` **[Number][1]** angle of rotation. (optional, default `auto`)
+-   `angle` **[number][1]** angle of rotation. (optional, default `auto`)
 -   `options` **[Object][2]?** if present, is an Object with optional attributes.
-    -   `options.background` **([String][3] \| [Object][2])** parsed by the [color][4] module to extract values for red, green, blue and alpha. (optional, default `"#000000"`)
+    -   `options.background` **([string][3] \| [Object][2])** parsed by the [color][4] module to extract values for red, green, blue and alpha. (optional, default `"#000000"`)
 
 ### Examples
 
@@ -74,9 +74,9 @@ Separate control over the level of sharpening in "flat" and "jagged" areas is av
 
 ### Parameters
 
--   `sigma` **[Number][1]?** the sigma of the Gaussian mask, where `sigma = 1 + radius / 2`.
--   `flat` **[Number][1]** the level of sharpening to apply to "flat" areas. (optional, default `1.0`)
--   `jagged` **[Number][1]** the level of sharpening to apply to "jagged" areas. (optional, default `2.0`)
+-   `sigma` **[number][1]?** the sigma of the Gaussian mask, where `sigma = 1 + radius / 2`.
+-   `flat` **[number][1]** the level of sharpening to apply to "flat" areas. (optional, default `1.0`)
+-   `jagged` **[number][1]** the level of sharpening to apply to "jagged" areas. (optional, default `2.0`)
 
 
 -   Throws **[Error][5]** Invalid parameters
@@ -90,7 +90,7 @@ When used without parameters the default window is 3x3.
 
 ### Parameters
 
--   `size` **[Number][1]** square mask size: size x size (optional, default `3`)
+-   `size` **[number][1]** square mask size: size x size (optional, default `3`)
 
 
 -   Throws **[Error][5]** Invalid parameters
@@ -105,7 +105,7 @@ When a `sigma` is provided, performs a slower, more accurate Gaussian blur.
 
 ### Parameters
 
--   `sigma` **[Number][1]?** a value between 0.3 and 1000 representing the sigma of the Gaussian mask, where `sigma = 1 + radius / 2`.
+-   `sigma` **[number][1]?** a value between 0.3 and 1000 representing the sigma of the Gaussian mask, where `sigma = 1 + radius / 2`.
 
 
 -   Throws **[Error][5]** Invalid parameters
@@ -119,7 +119,7 @@ Merge alpha transparency channel, if any, with a background.
 ### Parameters
 
 -   `options` **[Object][2]?** 
-    -   `options.background` **([String][3] \| [Object][2])** background colour, parsed by the [color][4] module, defaults to black. (optional, default `{r:0,g:0,b:0}`)
+    -   `options.background` **([string][3] \| [Object][2])** background colour, parsed by the [color][4] module, defaults to black. (optional, default `{r:0,g:0,b:0}`)
 
 Returns **Sharp** 
 
@@ -135,8 +135,8 @@ Supply a second argument to use a different output gamma value, otherwise the fi
 
 ### Parameters
 
--   `gamma` **[Number][1]** value between 1.0 and 3.0. (optional, default `2.2`)
--   `gammaOut` **[Number][1]?** value between 1.0 and 3.0. (optional, defaults to same as `gamma`)
+-   `gamma` **[number][1]** value between 1.0 and 3.0. (optional, default `2.2`)
+-   `gammaOut` **[number][1]?** value between 1.0 and 3.0. (optional, defaults to same as `gamma`)
 
 
 -   Throws **[Error][5]** Invalid parameters
@@ -180,11 +180,11 @@ Convolve the image with the specified kernel.
 ### Parameters
 
 -   `kernel` **[Object][2]** 
-    -   `kernel.width` **[Number][1]** width of the kernel in pixels.
-    -   `kernel.height` **[Number][1]** width of the kernel in pixels.
-    -   `kernel.kernel` **[Array][7]<[Number][1]>** Array of length `width*height` containing the kernel values.
-    -   `kernel.scale` **[Number][1]** the scale of the kernel in pixels. (optional, default `sum`)
-    -   `kernel.offset` **[Number][1]** the offset of the kernel in pixels. (optional, default `0`)
+    -   `kernel.width` **[number][1]** width of the kernel in pixels.
+    -   `kernel.height` **[number][1]** width of the kernel in pixels.
+    -   `kernel.kernel` **[Array][7]<[number][1]>** Array of length `width*height` containing the kernel values.
+    -   `kernel.scale` **[number][1]** the scale of the kernel in pixels. (optional, default `sum`)
+    -   `kernel.offset` **[number][1]** the offset of the kernel in pixels. (optional, default `0`)
 
 ### Examples
 
@@ -212,7 +212,7 @@ Any pixel value greather than or equal to the threshold value will be set to 255
 
 ### Parameters
 
--   `threshold` **[Number][1]** a value in the range 0-255 representing the level at which the threshold will be applied. (optional, default `128`)
+-   `threshold` **[number][1]** a value in the range 0-255 representing the level at which the threshold will be applied. (optional, default `128`)
 -   `options` **[Object][2]?** 
     -   `options.greyscale` **[Boolean][6]** convert to single channel greyscale. (optional, default `true`)
     -   `options.grayscale` **[Boolean][6]** alternative spelling for greyscale. (optional, default `true`)
@@ -231,13 +231,13 @@ the selected bitwise boolean `operation` between the corresponding pixels of the
 
 ### Parameters
 
--   `operand` **([Buffer][8] \| [String][3])** Buffer containing image data or String containing the path to an image file.
--   `operator` **[String][3]** one of `and`, `or` or `eor` to perform that bitwise operation, like the C logic operators `&`, `|` and `^` respectively.
+-   `operand` **([Buffer][8] \| [string][3])** Buffer containing image data or string containing the path to an image file.
+-   `operator` **[string][3]** one of `and`, `or` or `eor` to perform that bitwise operation, like the C logic operators `&`, `|` and `^` respectively.
 -   `options` **[Object][2]?** 
     -   `options.raw` **[Object][2]?** describes operand when using raw pixel data.
-        -   `options.raw.width` **[Number][1]?** 
-        -   `options.raw.height` **[Number][1]?** 
-        -   `options.raw.channels` **[Number][1]?** 
+        -   `options.raw.width` **[number][1]?** 
+        -   `options.raw.height` **[number][1]?** 
+        -   `options.raw.channels` **[number][1]?** 
 
 
 -   Throws **[Error][5]** Invalid parameters
@@ -250,8 +250,8 @@ Apply the linear formula a \* input + b to the image (levels adjustment)
 
 ### Parameters
 
--   `a` **[Number][1]** multiplier (optional, default `1.0`)
--   `b` **[Number][1]** offset (optional, default `0.0`)
+-   `a` **[number][1]** multiplier (optional, default `1.0`)
+-   `b` **[number][1]** offset (optional, default `0.0`)
 
 
 -   Throws **[Error][5]** Invalid parameters
@@ -264,8 +264,7 @@ Recomb the image with the specified matrix.
 
 ### Parameters
 
--   `inputMatrix`  
--   `3x3` **[Array][7]<[Array][7]<[Number][1]>>** Recombination matrix
+-   `inputMatrix` **[Array][7]<[Array][7]<[number][1]>>** 3x3 Recombination matrix
 
 ### Examples
 
@@ -298,9 +297,9 @@ Transforms the image using brightness, saturation and hue rotation.
 ### Parameters
 
 -   `options` **[Object][2]?** 
-    -   `options.brightness` **[Number][1]?** Brightness multiplier
-    -   `options.saturation` **[Number][1]?** Saturation multiplier
-    -   `options.hue` **[Number][1]?** Degrees for hue rotation
+    -   `options.brightness` **[number][1]?** Brightness multiplier
+    -   `options.saturation` **[number][1]?** Saturation multiplier
+    -   `options.hue` **[number][1]?** Degrees for hue rotation
 
 ### Examples
 
diff --git a/docs/api-output.md b/docs/api-output.md
index 05ee3d18..4fc328a8 100644
--- a/docs/api-output.md
+++ b/docs/api-output.md
@@ -15,7 +15,7 @@ A `Promise` is returned when `callback` is not provided.
 
 ### Parameters
 
--   `fileOut` **[String][2]** the path to write the image data to.
+-   `fileOut` **[string][2]** the path to write the image data to.
 -   `callback` **[Function][3]?** called on completion with two arguments `(err, info)`.
     `info` contains the output image `format`, `size` (bytes), `width`, `height`,
     `channels` and `premultiplied` (indicating if premultiplication was used).
@@ -62,7 +62,7 @@ A `Promise` is returned when `callback` is not provided.
 ### Parameters
 
 -   `options` **[Object][6]?** 
-    -   `options.resolveWithObject` **[Boolean][7]?** Resolve the Promise with an Object containing `data` and `info` properties instead of resolving only with `data`.
+    -   `options.resolveWithObject` **[boolean][7]?** Resolve the Promise with an Object containing `data` and `info` properties instead of resolving only with `data`.
 -   `callback` **[Function][3]?** 
 
 ### Examples
@@ -99,7 +99,7 @@ sRGB colour space and strip all metadata, including the removal of any ICC profi
 ### Parameters
 
 -   `options` **[Object][6]?** 
-    -   `options.orientation` **[Number][9]?** value between 1 and 8, used to update the EXIF `Orientation` tag.
+    -   `options.orientation` **[number][9]?** value between 1 and 8, used to update the EXIF `Orientation` tag.
 
 ### Examples
 
@@ -120,7 +120,7 @@ Force output to a given format.
 
 ### Parameters
 
--   `format` **([String][2] \| [Object][6])** as a String or an Object with an 'id' attribute
+-   `format` **([string][2] \| [Object][6])** as a string or an Object with an 'id' attribute
 -   `options` **[Object][6]** output options
 
 ### Examples
@@ -143,18 +143,18 @@ Use these JPEG options for output image.
 ### Parameters
 
 -   `options` **[Object][6]?** output options
-    -   `options.quality` **[Number][9]** quality, integer 1-100 (optional, default `80`)
-    -   `options.progressive` **[Boolean][7]** use progressive (interlace) scan (optional, default `false`)
-    -   `options.chromaSubsampling` **[String][2]** for quality < 90, set to '4:4:4' to prevent chroma subsampling otherwise defaults to '4:2:0' (use chroma subsampling); for quality >= 90 chroma is never subsampled (optional, default `'4:2:0'`)
-    -   `options.trellisQuantisation` **[Boolean][7]** apply trellis quantisation, requires libvips compiled with support for mozjpeg (optional, default `false`)
-    -   `options.overshootDeringing` **[Boolean][7]** apply overshoot deringing, requires libvips compiled with support for mozjpeg (optional, default `false`)
-    -   `options.optimiseScans` **[Boolean][7]** optimise progressive scans, forces progressive, requires libvips compiled with support for mozjpeg (optional, default `false`)
-    -   `options.optimizeScans` **[Boolean][7]** alternative spelling of optimiseScans (optional, default `false`)
-    -   `options.optimiseCoding` **[Boolean][7]** optimise Huffman coding tables (optional, default `true`)
-    -   `options.optimizeCoding` **[Boolean][7]** alternative spelling of optimiseCoding (optional, default `true`)
-    -   `options.quantisationTable` **[Number][9]** quantization table to use, integer 0-8, requires libvips compiled with support for mozjpeg (optional, default `0`)
-    -   `options.quantizationTable` **[Number][9]** alternative spelling of quantisationTable (optional, default `0`)
-    -   `options.force` **[Boolean][7]** force JPEG output, otherwise attempt to use input format (optional, default `true`)
+    -   `options.quality` **[number][9]** quality, integer 1-100 (optional, default `80`)
+    -   `options.progressive` **[boolean][7]** use progressive (interlace) scan (optional, default `false`)
+    -   `options.chromaSubsampling` **[string][2]** for quality < 90, set to '4:4:4' to prevent chroma subsampling otherwise defaults to '4:2:0' (use chroma subsampling); for quality >= 90 chroma is never subsampled (optional, default `'4:2:0'`)
+    -   `options.trellisQuantisation` **[boolean][7]** apply trellis quantisation, requires libvips compiled with support for mozjpeg (optional, default `false`)
+    -   `options.overshootDeringing` **[boolean][7]** apply overshoot deringing, requires libvips compiled with support for mozjpeg (optional, default `false`)
+    -   `options.optimiseScans` **[boolean][7]** optimise progressive scans, forces progressive, requires libvips compiled with support for mozjpeg (optional, default `false`)
+    -   `options.optimizeScans` **[boolean][7]** alternative spelling of optimiseScans (optional, default `false`)
+    -   `options.optimiseCoding` **[boolean][7]** optimise Huffman coding tables (optional, default `true`)
+    -   `options.optimizeCoding` **[boolean][7]** alternative spelling of optimiseCoding (optional, default `true`)
+    -   `options.quantisationTable` **[number][9]** quantization table to use, integer 0-8, requires libvips compiled with support for mozjpeg (optional, default `0`)
+    -   `options.quantizationTable` **[number][9]** alternative spelling of quantisationTable (optional, default `0`)
+    -   `options.force` **[boolean][7]** force JPEG output, otherwise attempt to use input format (optional, default `true`)
 
 ### Examples
 
@@ -182,15 +182,15 @@ Indexed PNG input at 1, 2 or 4 bits per pixel is converted to 8 bits per pixel.
 ### Parameters
 
 -   `options` **[Object][6]?** 
-    -   `options.progressive` **[Boolean][7]** use progressive (interlace) scan (optional, default `false`)
-    -   `options.compressionLevel` **[Number][9]** zlib compression level, 0-9 (optional, default `9`)
-    -   `options.adaptiveFiltering` **[Boolean][7]** use adaptive row filtering (optional, default `false`)
-    -   `options.palette` **[Boolean][7]** quantise to a palette-based image with alpha transparency support, requires libvips compiled with support for libimagequant (optional, default `false`)
-    -   `options.quality` **[Number][9]** use the lowest number of colours needed to achieve given quality, requires libvips compiled with support for libimagequant (optional, default `100`)
-    -   `options.colours` **[Number][9]** maximum number of palette entries, requires libvips compiled with support for libimagequant (optional, default `256`)
-    -   `options.colors` **[Number][9]** alternative spelling of `options.colours`, requires libvips compiled with support for libimagequant (optional, default `256`)
-    -   `options.dither` **[Number][9]** level of Floyd-Steinberg error diffusion, requires libvips compiled with support for libimagequant (optional, default `1.0`)
-    -   `options.force` **[Boolean][7]** force PNG output, otherwise attempt to use input format (optional, default `true`)
+    -   `options.progressive` **[boolean][7]** use progressive (interlace) scan (optional, default `false`)
+    -   `options.compressionLevel` **[number][9]** zlib compression level, 0-9 (optional, default `9`)
+    -   `options.adaptiveFiltering` **[boolean][7]** use adaptive row filtering (optional, default `false`)
+    -   `options.palette` **[boolean][7]** quantise to a palette-based image with alpha transparency support, requires libvips compiled with support for libimagequant (optional, default `false`)
+    -   `options.quality` **[number][9]** use the lowest number of colours needed to achieve given quality, requires libvips compiled with support for libimagequant (optional, default `100`)
+    -   `options.colours` **[number][9]** maximum number of palette entries, requires libvips compiled with support for libimagequant (optional, default `256`)
+    -   `options.colors` **[number][9]** alternative spelling of `options.colours`, requires libvips compiled with support for libimagequant (optional, default `256`)
+    -   `options.dither` **[number][9]** level of Floyd-Steinberg error diffusion, requires libvips compiled with support for libimagequant (optional, default `1.0`)
+    -   `options.force` **[boolean][7]** force PNG output, otherwise attempt to use input format (optional, default `true`)
 
 ### Examples
 
@@ -212,13 +212,13 @@ Use these WebP options for output image.
 ### Parameters
 
 -   `options` **[Object][6]?** output options
-    -   `options.quality` **[Number][9]** quality, integer 1-100 (optional, default `80`)
-    -   `options.alphaQuality` **[Number][9]** quality of alpha layer, integer 0-100 (optional, default `100`)
-    -   `options.lossless` **[Boolean][7]** use lossless compression mode (optional, default `false`)
-    -   `options.nearLossless` **[Boolean][7]** use near_lossless compression mode (optional, default `false`)
-    -   `options.smartSubsample` **[Boolean][7]** use high quality chroma subsampling (optional, default `false`)
-    -   `options.reductionEffort` **[Number][9]** level of CPU effort to reduce file size, integer 0-6 (optional, default `4`)
-    -   `options.force` **[Boolean][7]** force WebP output, otherwise attempt to use input format (optional, default `true`)
+    -   `options.quality` **[number][9]** quality, integer 1-100 (optional, default `80`)
+    -   `options.alphaQuality` **[number][9]** quality of alpha layer, integer 0-100 (optional, default `100`)
+    -   `options.lossless` **[boolean][7]** use lossless compression mode (optional, default `false`)
+    -   `options.nearLossless` **[boolean][7]** use near_lossless compression mode (optional, default `false`)
+    -   `options.smartSubsample` **[boolean][7]** use high quality chroma subsampling (optional, default `false`)
+    -   `options.reductionEffort` **[number][9]** level of CPU effort to reduce file size, integer 0-6 (optional, default `4`)
+    -   `options.force` **[boolean][7]** force WebP output, otherwise attempt to use input format (optional, default `true`)
 
 ### Examples
 
@@ -240,17 +240,17 @@ Use these TIFF options for output image.
 ### Parameters
 
 -   `options` **[Object][6]?** output options
-    -   `options.quality` **[Number][9]** quality, integer 1-100 (optional, default `80`)
-    -   `options.force` **[Boolean][7]** force TIFF output, otherwise attempt to use input format (optional, default `true`)
-    -   `options.compression` **[Boolean][7]** compression options: lzw, deflate, jpeg, ccittfax4 (optional, default `'jpeg'`)
-    -   `options.predictor` **[Boolean][7]** compression predictor options: none, horizontal, float (optional, default `'horizontal'`)
-    -   `options.pyramid` **[Boolean][7]** write an image pyramid (optional, default `false`)
-    -   `options.tile` **[Boolean][7]** write a tiled tiff (optional, default `false`)
-    -   `options.tileWidth` **[Boolean][7]** horizontal tile size (optional, default `256`)
-    -   `options.tileHeight` **[Boolean][7]** vertical tile size (optional, default `256`)
-    -   `options.xres` **[Number][9]** horizontal resolution in pixels/mm (optional, default `1.0`)
-    -   `options.yres` **[Number][9]** vertical resolution in pixels/mm (optional, default `1.0`)
-    -   `options.squash` **[Boolean][7]** squash 8-bit images down to 1 bit (optional, default `false`)
+    -   `options.quality` **[number][9]** quality, integer 1-100 (optional, default `80`)
+    -   `options.force` **[boolean][7]** force TIFF output, otherwise attempt to use input format (optional, default `true`)
+    -   `options.compression` **[boolean][7]** compression options: lzw, deflate, jpeg, ccittfax4 (optional, default `'jpeg'`)
+    -   `options.predictor` **[boolean][7]** compression predictor options: none, horizontal, float (optional, default `'horizontal'`)
+    -   `options.pyramid` **[boolean][7]** write an image pyramid (optional, default `false`)
+    -   `options.tile` **[boolean][7]** write a tiled tiff (optional, default `false`)
+    -   `options.tileWidth` **[boolean][7]** horizontal tile size (optional, default `256`)
+    -   `options.tileHeight` **[boolean][7]** vertical tile size (optional, default `256`)
+    -   `options.xres` **[number][9]** horizontal resolution in pixels/mm (optional, default `1.0`)
+    -   `options.yres` **[number][9]** vertical resolution in pixels/mm (optional, default `1.0`)
+    -   `options.squash` **[boolean][7]** squash 8-bit images down to 1 bit (optional, default `false`)
 
 ### Examples
 
@@ -283,9 +283,9 @@ Most versions of libheif support only the patent-encumbered HEVC compression for
 ### Parameters
 
 -   `options` **[Object][6]?** output options
-    -   `options.quality` **[Number][9]** quality, integer 1-100 (optional, default `80`)
-    -   `options.compression` **[Boolean][7]** compression format: hevc, avc, jpeg, av1 (optional, default `'hevc'`)
-    -   `options.lossless` **[Boolean][7]** use lossless compression (optional, default `false`)
+    -   `options.quality` **[number][9]** quality, integer 1-100 (optional, default `80`)
+    -   `options.compression` **[boolean][7]** compression format: hevc, avc, jpeg, av1 (optional, default `'hevc'`)
+    -   `options.lossless` **[boolean][7]** use lossless compression (optional, default `false`)
 
 
 -   Throws **[Error][4]** Invalid options
@@ -334,14 +334,14 @@ Warning: multiple sharp instances concurrently producing tile output can expose
 ### Parameters
 
 -   `options` **[Object][6]?** 
-    -   `options.size` **[Number][9]** tile size in pixels, a value between 1 and 8192. (optional, default `256`)
-    -   `options.overlap` **[Number][9]** tile overlap in pixels, a value between 0 and 8192. (optional, default `0`)
-    -   `options.angle` **[Number][9]** tile angle of rotation, must be a multiple of 90. (optional, default `0`)
-    -   `options.background` **([String][2] \| [Object][6])** background colour, parsed by the [color][10] module, defaults to white without transparency. (optional, default `{r:255,g:255,b:255,alpha:1}`)
-    -   `options.depth` **[String][2]?** how deep to make the pyramid, possible values are `onepixel`, `onetile` or `one`, default based on layout.
-    -   `options.skipBlanks` **[Number][9]** threshold to skip tile generation, a value 0 - 255 for 8-bit images or 0 - 65535 for 16-bit images (optional, default `-1`)
-    -   `options.container` **[String][2]** tile container, with value `fs` (filesystem) or `zip` (compressed file). (optional, default `'fs'`)
-    -   `options.layout` **[String][2]** filesystem layout, possible values are `dz`, `iiif`, `zoomify` or `google`. (optional, default `'dz'`)
+    -   `options.size` **[number][9]** tile size in pixels, a value between 1 and 8192. (optional, default `256`)
+    -   `options.overlap` **[number][9]** tile overlap in pixels, a value between 0 and 8192. (optional, default `0`)
+    -   `options.angle` **[number][9]** tile angle of rotation, must be a multiple of 90. (optional, default `0`)
+    -   `options.background` **([string][2] \| [Object][6])** background colour, parsed by the [color][10] module, defaults to white without transparency. (optional, default `{r:255,g:255,b:255,alpha:1}`)
+    -   `options.depth` **[string][2]?** how deep to make the pyramid, possible values are `onepixel`, `onetile` or `one`, default based on layout.
+    -   `options.skipBlanks` **[number][9]** threshold to skip tile generation, a value 0 - 255 for 8-bit images or 0 - 65535 for 16-bit images (optional, default `-1`)
+    -   `options.container` **[string][2]** tile container, with value `fs` (filesystem) or `zip` (compressed file). (optional, default `'fs'`)
+    -   `options.layout` **[string][2]** filesystem layout, possible values are `dz`, `iiif`, `zoomify` or `google`. (optional, default `'dz'`)
 
 ### Examples
 
diff --git a/docs/api-resize.md b/docs/api-resize.md
index a976aebe..2a9a4f82 100644
--- a/docs/api-resize.md
+++ b/docs/api-resize.md
@@ -38,8 +38,8 @@ Possible interpolation kernels are:
 
 ### Parameters
 
--   `width` **[Number][8]?** pixels wide the resultant image should be. Use `null` or `undefined` to auto-scale the width to match the height.
--   `height` **[Number][8]?** pixels high the resultant image should be. Use `null` or `undefined` to auto-scale the height to match the width.
+-   `width` **[number][8]?** pixels wide the resultant image should be. Use `null` or `undefined` to auto-scale the width to match the height.
+-   `height` **[number][8]?** pixels high the resultant image should be. Use `null` or `undefined` to auto-scale the height to match the width.
 -   `options` **[Object][9]?** 
     -   `options.width` **[String][10]?** alternative means of specifying `width`. If both are present this take priority.
     -   `options.height` **[String][10]?** alternative means of specifying `height`. If both are present this take priority.
@@ -136,11 +136,11 @@ This operation will always occur after resizing and extraction, if any.
 
 ### Parameters
 
--   `extend` **([Number][8] \| [Object][9])** single pixel count to add to all edges or an Object with per-edge counts
-    -   `extend.top` **[Number][8]?** 
-    -   `extend.left` **[Number][8]?** 
-    -   `extend.bottom` **[Number][8]?** 
-    -   `extend.right` **[Number][8]?** 
+-   `extend` **([number][8] \| [Object][9])** single pixel count to add to all edges or an Object with per-edge counts
+    -   `extend.top` **[number][8]?** 
+    -   `extend.left` **[number][8]?** 
+    -   `extend.bottom` **[number][8]?** 
+    -   `extend.right` **[number][8]?** 
     -   `extend.background` **([String][10] \| [Object][9])** background colour, parsed by the [color][11] module, defaults to black without transparency. (optional, default `{r:0,g:0,b:0,alpha:1}`)
 
 ### Examples
@@ -175,10 +175,10 @@ Extract/crop a region of the image.
 ### Parameters
 
 -   `options` **[Object][9]** describes the region to extract using integral pixel values
-    -   `options.left` **[Number][8]** zero-indexed offset from left edge
-    -   `options.top` **[Number][8]** zero-indexed offset from top edge
-    -   `options.width` **[Number][8]** width of region to extract
-    -   `options.height` **[Number][8]** height of region to extract
+    -   `options.left` **[number][8]** zero-indexed offset from left edge
+    -   `options.top` **[number][8]** zero-indexed offset from top edge
+    -   `options.width` **[number][8]** width of region to extract
+    -   `options.height` **[number][8]** height of region to extract
 
 ### Examples
 
@@ -213,7 +213,7 @@ The `info` response Object will contain `trimOffsetLeft` and `trimOffsetTop` pro
 
 ### Parameters
 
--   `threshold` **[Number][8]** the allowed difference from the top-left pixel, a number greater than zero. (optional, default `10`)
+-   `threshold` **[number][8]** the allowed difference from the top-left pixel, a number greater than zero. (optional, default `10`)
 
 
 -   Throws **[Error][13]** Invalid parameters
diff --git a/docs/api-utility.md b/docs/api-utility.md
index 3cea51e1..9b450c18 100644
--- a/docs/api-utility.md
+++ b/docs/api-utility.md
@@ -31,10 +31,10 @@ useful for determining how much working memory is required for a particular task
 
 ### Parameters
 
--   `options` **([Object][1] \| [Boolean][2])** Object with the following attributes, or Boolean where true uses default cache settings and false removes all caching (optional, default `true`)
-    -   `options.memory` **[Number][3]** is the maximum memory in MB to use for this cache (optional, default `50`)
-    -   `options.files` **[Number][3]** is the maximum number of files to hold open (optional, default `20`)
-    -   `options.items` **[Number][3]** is the maximum number of operations to cache (optional, default `100`)
+-   `options` **([Object][1] \| [boolean][2])** Object with the following attributes, or boolean where true uses default cache settings and false removes all caching (optional, default `true`)
+    -   `options.memory` **[number][3]** is the maximum memory in MB to use for this cache (optional, default `50`)
+    -   `options.files` **[number][3]** is the maximum number of files to hold open (optional, default `20`)
+    -   `options.items` **[number][3]** is the maximum number of operations to cache (optional, default `100`)
 
 ### Examples
 
@@ -64,7 +64,7 @@ This method always returns the current concurrency.
 
 ### Parameters
 
--   `concurrency` **[Number][3]?** 
+-   `concurrency` **[number][3]?** 
 
 ### Examples
 
@@ -74,7 +74,7 @@ sharp.concurrency(2); // 2
 sharp.concurrency(0); // 4
 ```
 
-Returns **[Number][3]** concurrency
+Returns **[number][3]** concurrency
 
 ## queue
 
@@ -116,7 +116,7 @@ by taking advantage of the SIMD vector unit of the CPU, e.g. Intel SSE and ARM N
 
 ### Parameters
 
--   `simd` **[Boolean][2]**  (optional, default `true`)
+-   `simd` **[boolean][2]**  (optional, default `true`)
 
 ### Examples
 
@@ -130,7 +130,7 @@ const simd = sharp.simd(false);
 // prevent libvips from using liborc at runtime
 ```
 
-Returns **[Boolean][2]** 
+Returns **[boolean][2]** 
 
 [1]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object
 
diff --git a/lib/channel.js b/lib/channel.js
index 965c1f56..f256b3fc 100644
--- a/lib/channel.js
+++ b/lib/channel.js
@@ -60,7 +60,7 @@ function ensureAlpha () {
  *     // green.jpg is a greyscale image containing the green channel of the input
  *    });
  *
- * @param {Number|String} channel - zero-indexed band number to extract, or `red`, `green` or `blue` as alternative to `0`, `1` or `2` respectively.
+ * @param {number|string} channel - zero-indexed band number to extract, or `red`, `green` or `blue` as alternative to `0`, `1` or `2` respectively.
  * @returns {Sharp}
  * @throws {Error} Invalid channel
  */
@@ -91,7 +91,7 @@ function extractChannel (channel) {
  * Buffers may be any of the image formats supported by sharp: JPEG, PNG, WebP, GIF, SVG, TIFF or raw pixel image data.
  * For raw pixel input, the `options` object should contain a `raw` attribute, which follows the format of the attribute of the same name in the `sharp()` constructor.
  *
- * @param {Array<String|Buffer>|String|Buffer} images - one or more images (file paths, Buffers).
+ * @param {Array<string|Buffer>|string|Buffer} images - one or more images (file paths, Buffers).
  * @param {Object} options - image options, see `sharp()` constructor.
  * @returns {Sharp}
  * @throws {Error} Invalid parameters
@@ -119,7 +119,7 @@ function joinChannel (images, options) {
  *     // then `O(1,1) = 0b11110111 & 0b10101010 & 0b00001111 = 0b00000010 = 2`.
  *   });
  *
- * @param {String} boolOp - one of `and`, `or` or `eor` to perform that bitwise operation, like the C logic operators `&`, `|` and `^` respectively.
+ * @param {string} boolOp - one of `and`, `or` or `eor` to perform that bitwise operation, like the C logic operators `&`, `|` and `^` respectively.
  * @returns {Sharp}
  * @throws {Error} Invalid parameters
  */
diff --git a/lib/colour.js b/lib/colour.js
index bf0fc8a5..d2151613 100644
--- a/lib/colour.js
+++ b/lib/colour.js
@@ -19,7 +19,7 @@ const colourspace = {
  * Tint the image using the provided chroma while preserving the image luminance.
  * An alpha channel may be present and will be unchanged by the operation.
  *
- * @param {String|Object} rgb - parsed by the [color](https://www.npmjs.org/package/color) module to extract chroma values.
+ * @param {string|Object} rgb - parsed by the [color](https://www.npmjs.org/package/color) module to extract chroma values.
  * @returns {Sharp}
  * @throws {Error} Invalid parameter
  */
@@ -57,7 +57,7 @@ function grayscale (grayscale) {
 /**
  * Set the output colourspace.
  * By default output image will be web-friendly sRGB, with additional channels interpreted as alpha channels.
- * @param {String} [colourspace] - output colourspace e.g. `srgb`, `rgb`, `cmyk`, `lab`, `b-w` [...](https://github.com/libvips/libvips/blob/master/libvips/iofuncs/enumtypes.c#L568)
+ * @param {string} [colourspace] - output colourspace e.g. `srgb`, `rgb`, `cmyk`, `lab`, `b-w` [...](https://github.com/libvips/libvips/blob/master/libvips/iofuncs/enumtypes.c#L568)
  * @returns {Sharp}
  * @throws {Error} Invalid parameters
  */
@@ -71,7 +71,7 @@ function toColourspace (colourspace) {
 
 /**
  * Alternative spelling of `toColourspace`.
- * @param {String} [colorspace] - output colorspace.
+ * @param {string} [colorspace] - output colorspace.
  * @returns {Sharp}
  * @throws {Error} Invalid parameters
  */
@@ -82,8 +82,8 @@ function toColorspace (colorspace) {
 /**
  * Update a colour attribute of the this.options Object.
  * @private
- * @param {String} key
- * @param {String|Object} value
+ * @param {string} key
+ * @param {string|Object} value
  * @throws {Error} Invalid value
  */
 function _setBackgroundColourOption (key, value) {
diff --git a/lib/input.js b/lib/input.js
index e1eb48ae..c389d29d 100644
--- a/lib/input.js
+++ b/lib/input.js
@@ -147,7 +147,7 @@ function _createInputDescriptor (input, inputOptions, containerOptions) {
  * Handle incoming Buffer chunk on Writable Stream.
  * @private
  * @param {Buffer} chunk
- * @param {String} encoding - unused
+ * @param {string} encoding - unused
  * @param {Function} callback
  */
 function _write (chunk, encoding, callback) {
@@ -183,7 +183,7 @@ function _flattenBufferIn () {
 /**
  * Are we expecting Stream-based input?
  * @private
- * @returns {Boolean}
+ * @returns {boolean}
  */
 function _isStreamInput () {
   return Array.isArray(this.options.input.buffer);
diff --git a/lib/is.js b/lib/is.js
index eaabc7cf..94b868a8 100644
--- a/lib/is.js
+++ b/lib/is.js
@@ -91,8 +91,8 @@ const inArray = function (val, list) {
 /**
  * Create an Error with a message relating to an invalid parameter.
  *
- * @param {String} name - parameter name.
- * @param {String} expected - description of the type/value/range expected.
+ * @param {string} name - parameter name.
+ * @param {string} expected - description of the type/value/range expected.
  * @param {*} actual - the value received.
  * @returns {Error} Containing the formatted message.
  * @private
diff --git a/lib/operation.js b/lib/operation.js
index 9e0caa84..43adc44e 100644
--- a/lib/operation.js
+++ b/lib/operation.js
@@ -32,9 +32,9 @@ const is = require('./is');
  *   });
  * readableStream.pipe(pipeline);
  *
- * @param {Number} [angle=auto] angle of rotation.
+ * @param {number} [angle=auto] angle of rotation.
  * @param {Object} [options] - if present, is an Object with optional attributes.
- * @param {String|Object} [options.background="#000000"] parsed by the [color](https://www.npmjs.org/package/color) module to extract values for red, green, blue and alpha.
+ * @param {string|Object} [options.background="#000000"] parsed by the [color](https://www.npmjs.org/package/color) module to extract values for red, green, blue and alpha.
  * @returns {Sharp}
  * @throws {Error} Invalid parameters
  */
@@ -88,9 +88,9 @@ function flop (flop) {
  * When a `sigma` is provided, performs a slower, more accurate sharpen of the L channel in the LAB colour space.
  * Separate control over the level of sharpening in "flat" and "jagged" areas is available.
  *
- * @param {Number} [sigma] - the sigma of the Gaussian mask, where `sigma = 1 + radius / 2`.
- * @param {Number} [flat=1.0] - the level of sharpening to apply to "flat" areas.
- * @param {Number} [jagged=2.0] - the level of sharpening to apply to "jagged" areas.
+ * @param {number} [sigma] - the sigma of the Gaussian mask, where `sigma = 1 + radius / 2`.
+ * @param {number} [flat=1.0] - the level of sharpening to apply to "flat" areas.
+ * @param {number} [jagged=2.0] - the level of sharpening to apply to "jagged" areas.
  * @returns {Sharp}
  * @throws {Error} Invalid parameters
  */
@@ -129,7 +129,7 @@ function sharpen (sigma, flat, jagged) {
 /**
  * Apply median filter.
  * When used without parameters the default window is 3x3.
- * @param {Number} [size=3] square mask size: size x size
+ * @param {number} [size=3] square mask size: size x size
  * @returns {Sharp}
  * @throws {Error} Invalid parameters
  */
@@ -150,7 +150,7 @@ function median (size) {
  * Blur the image.
  * When used without parameters, performs a fast, mild blur of the output image.
  * When a `sigma` is provided, performs a slower, more accurate Gaussian blur.
- * @param {Number} [sigma] a value between 0.3 and 1000 representing the sigma of the Gaussian mask, where `sigma = 1 + radius / 2`.
+ * @param {number} [sigma] a value between 0.3 and 1000 representing the sigma of the Gaussian mask, where `sigma = 1 + radius / 2`.
  * @returns {Sharp}
  * @throws {Error} Invalid parameters
  */
@@ -173,7 +173,7 @@ function blur (sigma) {
 /**
  * Merge alpha transparency channel, if any, with a background.
  * @param {Object} [options]
- * @param {String|Object} [options.background={r: 0, g: 0, b: 0}] - background colour, parsed by the [color](https://www.npmjs.org/package/color) module, defaults to black.
+ * @param {string|Object} [options.background={r: 0, g: 0, b: 0}] - background colour, parsed by the [color](https://www.npmjs.org/package/color) module, defaults to black.
  * @returns {Sharp}
  */
 function flatten (options) {
@@ -193,8 +193,8 @@ function flatten (options) {
  *
  * Supply a second argument to use a different output gamma value, otherwise the first value is used in both cases.
  *
- * @param {Number} [gamma=2.2] value between 1.0 and 3.0.
- * @param {Number} [gammaOut] value between 1.0 and 3.0. (optional, defaults to same as `gamma`)
+ * @param {number} [gamma=2.2] value between 1.0 and 3.0.
+ * @param {number} [gammaOut] value between 1.0 and 3.0. (optional, defaults to same as `gamma`)
  * @returns {Sharp}
  * @throws {Error} Invalid parameters
  */
@@ -264,11 +264,11 @@ function normalize (normalize) {
  *   });
  *
  * @param {Object} kernel
- * @param {Number} kernel.width - width of the kernel in pixels.
- * @param {Number} kernel.height - width of the kernel in pixels.
- * @param {Array<Number>} kernel.kernel - Array of length `width*height` containing the kernel values.
- * @param {Number} [kernel.scale=sum] - the scale of the kernel in pixels.
- * @param {Number} [kernel.offset=0] - the offset of the kernel in pixels.
+ * @param {number} kernel.width - width of the kernel in pixels.
+ * @param {number} kernel.height - width of the kernel in pixels.
+ * @param {Array<number>} kernel.kernel - Array of length `width*height` containing the kernel values.
+ * @param {number} [kernel.scale=sum] - the scale of the kernel in pixels.
+ * @param {number} [kernel.offset=0] - the offset of the kernel in pixels.
  * @returns {Sharp}
  * @throws {Error} Invalid parameters
  */
@@ -300,7 +300,7 @@ function convolve (kernel) {
 
 /**
  * Any pixel value greather than or equal to the threshold value will be set to 255, otherwise it will be set to 0.
- * @param {Number} [threshold=128] - a value in the range 0-255 representing the level at which the threshold will be applied.
+ * @param {number} [threshold=128] - a value in the range 0-255 representing the level at which the threshold will be applied.
  * @param {Object} [options]
  * @param {Boolean} [options.greyscale=true] - convert to single channel greyscale.
  * @param {Boolean} [options.grayscale=true] - alternative spelling for greyscale.
@@ -331,13 +331,13 @@ function threshold (threshold, options) {
  * This operation creates an output image where each pixel is the result of
  * the selected bitwise boolean `operation` between the corresponding pixels of the input images.
  *
- * @param {Buffer|String} operand - Buffer containing image data or String containing the path to an image file.
- * @param {String} operator - one of `and`, `or` or `eor` to perform that bitwise operation, like the C logic operators `&`, `|` and `^` respectively.
+ * @param {Buffer|string} operand - Buffer containing image data or string containing the path to an image file.
+ * @param {string} operator - one of `and`, `or` or `eor` to perform that bitwise operation, like the C logic operators `&`, `|` and `^` respectively.
  * @param {Object} [options]
  * @param {Object} [options.raw] - describes operand when using raw pixel data.
- * @param {Number} [options.raw.width]
- * @param {Number} [options.raw.height]
- * @param {Number} [options.raw.channels]
+ * @param {number} [options.raw.width]
+ * @param {number} [options.raw.height]
+ * @param {number} [options.raw.channels]
  * @returns {Sharp}
  * @throws {Error} Invalid parameters
  */
@@ -353,8 +353,8 @@ function boolean (operand, operator, options) {
 
 /**
  * Apply the linear formula a * input + b to the image (levels adjustment)
- * @param {Number} [a=1.0] multiplier
- * @param {Number} [b=0.0] offset
+ * @param {number} [a=1.0] multiplier
+ * @param {number} [b=0.0] offset
  * @returns {Sharp}
  * @throws {Error} Invalid parameters
  */
@@ -394,7 +394,7 @@ function linear (a, b) {
  *     // With this example input, a sepia filter has been applied
  *   });
  *
- * @param {Array<Array<Number>>} 3x3 Recombination matrix
+ * @param {Array<Array<number>>} inputMatrix - 3x3 Recombination matrix
  * @returns {Sharp}
  * @throws {Error} Invalid parameters
  */
@@ -440,9 +440,9 @@ function recomb (inputMatrix) {
  *   });
  *
  * @param {Object} [options]
- * @param {Number} [options.brightness] Brightness multiplier
- * @param {Number} [options.saturation] Saturation multiplier
- * @param {Number} [options.hue] Degrees for hue rotation
+ * @param {number} [options.brightness] Brightness multiplier
+ * @param {number} [options.saturation] Saturation multiplier
+ * @param {number} [options.hue] Degrees for hue rotation
  * @returns {Sharp}
  */
 function modulate (options) {
diff --git a/lib/output.js b/lib/output.js
index 1548b990..550ae4b2 100644
--- a/lib/output.js
+++ b/lib/output.js
@@ -36,7 +36,7 @@ const formats = new Map([
  *   .then(info => { ... })
  *   .catch(err => { ... });
  *
- * @param {String} fileOut - the path to write the image data to.
+ * @param {string} fileOut - the path to write the image data to.
  * @param {Function} [callback] - called on completion with two arguments `(err, info)`.
  * `info` contains the output image `format`, `size` (bytes), `width`, `height`,
  * `channels` and `premultiplied` (indicating if premultiplication was used).
@@ -103,7 +103,7 @@ function toFile (fileOut, callback) {
  *   .catch(err => { ... });
  *
  * @param {Object} [options]
- * @param {Boolean} [options.resolveWithObject] Resolve the Promise with an Object containing `data` and `info` properties instead of resolving only with `data`.
+ * @param {boolean} [options.resolveWithObject] Resolve the Promise with an Object containing `data` and `info` properties instead of resolving only with `data`.
  * @param {Function} [callback]
  * @returns {Promise<Buffer>} - when no callback is provided
  */
@@ -130,7 +130,7 @@ function toBuffer (options, callback) {
  *   .then(info => { ... });
  *
  * @param {Object} [options]
- * @param {Number} [options.orientation] value between 1 and 8, used to update the EXIF `Orientation` tag.
+ * @param {number} [options.orientation] value between 1 and 8, used to update the EXIF `Orientation` tag.
  * @returns {Sharp}
  * @throws {Error} Invalid parameters
  */
@@ -157,7 +157,7 @@ function withMetadata (options) {
  *   .toFormat('png')
  *   .toBuffer();
  *
- * @param {(String|Object)} format - as a String or an Object with an 'id' attribute
+ * @param {(string|Object)} format - as a string or an Object with an 'id' attribute
  * @param {Object} options - output options
  * @returns {Sharp}
  * @throws {Error} unsupported format or options
@@ -183,18 +183,18 @@ function toFormat (format, options) {
  *   .toBuffer();
  *
  * @param {Object} [options] - output options
- * @param {Number} [options.quality=80] - quality, integer 1-100
- * @param {Boolean} [options.progressive=false] - use progressive (interlace) scan
- * @param {String} [options.chromaSubsampling='4:2:0'] - for quality < 90, set to '4:4:4' to prevent chroma subsampling otherwise defaults to '4:2:0' (use chroma subsampling); for quality >= 90 chroma is never subsampled
- * @param {Boolean} [options.trellisQuantisation=false] - apply trellis quantisation, requires libvips compiled with support for mozjpeg
- * @param {Boolean} [options.overshootDeringing=false] - apply overshoot deringing, requires libvips compiled with support for mozjpeg
- * @param {Boolean} [options.optimiseScans=false] - optimise progressive scans, forces progressive, requires libvips compiled with support for mozjpeg
- * @param {Boolean} [options.optimizeScans=false] - alternative spelling of optimiseScans
- * @param {Boolean} [options.optimiseCoding=true] - optimise Huffman coding tables
- * @param {Boolean} [options.optimizeCoding=true] - alternative spelling of optimiseCoding
- * @param {Number} [options.quantisationTable=0] - quantization table to use, integer 0-8, requires libvips compiled with support for mozjpeg
- * @param {Number} [options.quantizationTable=0] - alternative spelling of quantisationTable
- * @param {Boolean} [options.force=true] - force JPEG output, otherwise attempt to use input format
+ * @param {number} [options.quality=80] - quality, integer 1-100
+ * @param {boolean} [options.progressive=false] - use progressive (interlace) scan
+ * @param {string} [options.chromaSubsampling='4:2:0'] - for quality < 90, set to '4:4:4' to prevent chroma subsampling otherwise defaults to '4:2:0' (use chroma subsampling); for quality >= 90 chroma is never subsampled
+ * @param {boolean} [options.trellisQuantisation=false] - apply trellis quantisation, requires libvips compiled with support for mozjpeg
+ * @param {boolean} [options.overshootDeringing=false] - apply overshoot deringing, requires libvips compiled with support for mozjpeg
+ * @param {boolean} [options.optimiseScans=false] - optimise progressive scans, forces progressive, requires libvips compiled with support for mozjpeg
+ * @param {boolean} [options.optimizeScans=false] - alternative spelling of optimiseScans
+ * @param {boolean} [options.optimiseCoding=true] - optimise Huffman coding tables
+ * @param {boolean} [options.optimizeCoding=true] - alternative spelling of optimiseCoding
+ * @param {number} [options.quantisationTable=0] - quantization table to use, integer 0-8, requires libvips compiled with support for mozjpeg
+ * @param {number} [options.quantizationTable=0] - alternative spelling of quantisationTable
+ * @param {boolean} [options.force=true] - force JPEG output, otherwise attempt to use input format
  * @returns {Sharp}
  * @throws {Error} Invalid options
  */
@@ -260,15 +260,15 @@ function jpeg (options) {
  *   .toBuffer();
  *
  * @param {Object} [options]
- * @param {Boolean} [options.progressive=false] - use progressive (interlace) scan
- * @param {Number} [options.compressionLevel=9] - zlib compression level, 0-9
- * @param {Boolean} [options.adaptiveFiltering=false] - use adaptive row filtering
- * @param {Boolean} [options.palette=false] - quantise to a palette-based image with alpha transparency support, requires libvips compiled with support for libimagequant
- * @param {Number} [options.quality=100] - use the lowest number of colours needed to achieve given quality, requires libvips compiled with support for libimagequant
- * @param {Number} [options.colours=256] - maximum number of palette entries, requires libvips compiled with support for libimagequant
- * @param {Number} [options.colors=256] - alternative spelling of `options.colours`, requires libvips compiled with support for libimagequant
- * @param {Number} [options.dither=1.0] - level of Floyd-Steinberg error diffusion, requires libvips compiled with support for libimagequant
- * @param {Boolean} [options.force=true] - force PNG output, otherwise attempt to use input format
+ * @param {boolean} [options.progressive=false] - use progressive (interlace) scan
+ * @param {number} [options.compressionLevel=9] - zlib compression level, 0-9
+ * @param {boolean} [options.adaptiveFiltering=false] - use adaptive row filtering
+ * @param {boolean} [options.palette=false] - quantise to a palette-based image with alpha transparency support, requires libvips compiled with support for libimagequant
+ * @param {number} [options.quality=100] - use the lowest number of colours needed to achieve given quality, requires libvips compiled with support for libimagequant
+ * @param {number} [options.colours=256] - maximum number of palette entries, requires libvips compiled with support for libimagequant
+ * @param {number} [options.colors=256] - alternative spelling of `options.colours`, requires libvips compiled with support for libimagequant
+ * @param {number} [options.dither=1.0] - level of Floyd-Steinberg error diffusion, requires libvips compiled with support for libimagequant
+ * @param {boolean} [options.force=true] - force PNG output, otherwise attempt to use input format
  * @returns {Sharp}
  * @throws {Error} Invalid options
  */
@@ -328,13 +328,13 @@ function png (options) {
  *   .toBuffer();
  *
  * @param {Object} [options] - output options
- * @param {Number} [options.quality=80] - quality, integer 1-100
- * @param {Number} [options.alphaQuality=100] - quality of alpha layer, integer 0-100
- * @param {Boolean} [options.lossless=false] - use lossless compression mode
- * @param {Boolean} [options.nearLossless=false] - use near_lossless compression mode
- * @param {Boolean} [options.smartSubsample=false] - use high quality chroma subsampling
- * @param {Number} [options.reductionEffort=4] - level of CPU effort to reduce file size, integer 0-6
- * @param {Boolean} [options.force=true] - force WebP output, otherwise attempt to use input format
+ * @param {number} [options.quality=80] - quality, integer 1-100
+ * @param {number} [options.alphaQuality=100] - quality of alpha layer, integer 0-100
+ * @param {boolean} [options.lossless=false] - use lossless compression mode
+ * @param {boolean} [options.nearLossless=false] - use near_lossless compression mode
+ * @param {boolean} [options.smartSubsample=false] - use high quality chroma subsampling
+ * @param {number} [options.reductionEffort=4] - level of CPU effort to reduce file size, integer 0-6
+ * @param {boolean} [options.force=true] - force WebP output, otherwise attempt to use input format
  * @returns {Sharp}
  * @throws {Error} Invalid options
  */
@@ -386,17 +386,17 @@ function webp (options) {
  *   .then(info => { ... });
  *
  * @param {Object} [options] - output options
- * @param {Number} [options.quality=80] - quality, integer 1-100
- * @param {Boolean} [options.force=true] - force TIFF output, otherwise attempt to use input format
- * @param {Boolean} [options.compression='jpeg'] - compression options: lzw, deflate, jpeg, ccittfax4
- * @param {Boolean} [options.predictor='horizontal'] - compression predictor options: none, horizontal, float
- * @param {Boolean} [options.pyramid=false] - write an image pyramid
- * @param {Boolean} [options.tile=false] - write a tiled tiff
- * @param {Boolean} [options.tileWidth=256] - horizontal tile size
- * @param {Boolean} [options.tileHeight=256] - vertical tile size
- * @param {Number} [options.xres=1.0] - horizontal resolution in pixels/mm
- * @param {Number} [options.yres=1.0] - vertical resolution in pixels/mm
- * @param {Boolean} [options.squash=false] - squash 8-bit images down to 1 bit
+ * @param {number} [options.quality=80] - quality, integer 1-100
+ * @param {boolean} [options.force=true] - force TIFF output, otherwise attempt to use input format
+ * @param {boolean} [options.compression='jpeg'] - compression options: lzw, deflate, jpeg, ccittfax4
+ * @param {boolean} [options.predictor='horizontal'] - compression predictor options: none, horizontal, float
+ * @param {boolean} [options.pyramid=false] - write an image pyramid
+ * @param {boolean} [options.tile=false] - write a tiled tiff
+ * @param {boolean} [options.tileWidth=256] - horizontal tile size
+ * @param {boolean} [options.tileHeight=256] - vertical tile size
+ * @param {number} [options.xres=1.0] - horizontal resolution in pixels/mm
+ * @param {number} [options.yres=1.0] - vertical resolution in pixels/mm
+ * @param {boolean} [options.squash=false] - squash 8-bit images down to 1 bit
  * @returns {Sharp}
  * @throws {Error} Invalid options
  */
@@ -482,9 +482,9 @@ function tiff (options) {
  * @since 0.23.0
  *
  * @param {Object} [options] - output options
- * @param {Number} [options.quality=80] - quality, integer 1-100
- * @param {Boolean} [options.compression='hevc'] - compression format: hevc, avc, jpeg, av1
- * @param {Boolean} [options.lossless=false] - use lossless compression
+ * @param {number} [options.quality=80] - quality, integer 1-100
+ * @param {boolean} [options.compression='hevc'] - compression format: hevc, avc, jpeg, av1
+ * @param {boolean} [options.lossless=false] - use lossless compression
  * @returns {Sharp}
  * @throws {Error} Invalid options
  */
@@ -563,14 +563,14 @@ function raw () {
  *   });
  *
  * @param {Object} [options]
- * @param {Number} [options.size=256] tile size in pixels, a value between 1 and 8192.
- * @param {Number} [options.overlap=0] tile overlap in pixels, a value between 0 and 8192.
- * @param {Number} [options.angle=0] tile angle of rotation, must be a multiple of 90.
- * @param {String|Object} [options.background={r: 255, g: 255, b: 255, alpha: 1}] - background colour, parsed by the [color](https://www.npmjs.org/package/color) module, defaults to white without transparency.
- * @param {String} [options.depth] how deep to make the pyramid, possible values are `onepixel`, `onetile` or `one`, default based on layout.
- * @param {Number} [options.skipBlanks=-1] threshold to skip tile generation, a value 0 - 255 for 8-bit images or 0 - 65535 for 16-bit images
- * @param {String} [options.container='fs'] tile container, with value `fs` (filesystem) or `zip` (compressed file).
- * @param {String} [options.layout='dz'] filesystem layout, possible values are `dz`, `iiif`, `zoomify` or `google`.
+ * @param {number} [options.size=256] tile size in pixels, a value between 1 and 8192.
+ * @param {number} [options.overlap=0] tile overlap in pixels, a value between 0 and 8192.
+ * @param {number} [options.angle=0] tile angle of rotation, must be a multiple of 90.
+ * @param {string|Object} [options.background={r: 255, g: 255, b: 255, alpha: 1}] - background colour, parsed by the [color](https://www.npmjs.org/package/color) module, defaults to white without transparency.
+ * @param {string} [options.depth] how deep to make the pyramid, possible values are `onepixel`, `onetile` or `one`, default based on layout.
+ * @param {number} [options.skipBlanks=-1] threshold to skip tile generation, a value 0 - 255 for 8-bit images or 0 - 65535 for 16-bit images
+ * @param {string} [options.container='fs'] tile container, with value `fs` (filesystem) or `zip` (compressed file).
+ * @param {string} [options.layout='dz'] filesystem layout, possible values are `dz`, `iiif`, `zoomify` or `google`.
  * @returns {Sharp}
  * @throws {Error} Invalid parameters
  */
@@ -653,9 +653,9 @@ function tile (options) {
  * Update the output format unless options.force is false,
  * in which case revert to input format.
  * @private
- * @param {String} formatOut
+ * @param {string} formatOut
  * @param {Object} [options]
- * @param {Boolean} [options.force=true] - force output format, otherwise attempt to use input format
+ * @param {boolean} [options.force=true] - force output format, otherwise attempt to use input format
  * @returns {Sharp}
  */
 function _updateFormatOut (formatOut, options) {
@@ -666,10 +666,10 @@ function _updateFormatOut (formatOut, options) {
 }
 
 /**
- * Update a Boolean attribute of the this.options Object.
+ * Update a boolean attribute of the this.options Object.
  * @private
- * @param {String} key
- * @param {Boolean} val
+ * @param {string} key
+ * @param {boolean} val
  * @throws {Error} Invalid key
  */
 function _setBooleanOption (key, val) {
diff --git a/lib/resize.js b/lib/resize.js
index aa86a80a..eca92389 100644
--- a/lib/resize.js
+++ b/lib/resize.js
@@ -190,8 +190,8 @@ function isRotationExpected (options) {
  *     .toBuffer()
  *   );
  *
- * @param {Number} [width] - pixels wide the resultant image should be. Use `null` or `undefined` to auto-scale the width to match the height.
- * @param {Number} [height] - pixels high the resultant image should be. Use `null` or `undefined` to auto-scale the height to match the width.
+ * @param {number} [width] - pixels wide the resultant image should be. Use `null` or `undefined` to auto-scale the width to match the height.
+ * @param {number} [height] - pixels high the resultant image should be. Use `null` or `undefined` to auto-scale the height to match the width.
  * @param {Object} [options]
  * @param {String} [options.width] - alternative means of specifying `width`. If both are present this take priority.
  * @param {String} [options.height] - alternative means of specifying `height`. If both are present this take priority.
@@ -302,11 +302,11 @@ function resize (width, height, options) {
  *   })
  *   ...
  *
- * @param {(Number|Object)} extend - single pixel count to add to all edges or an Object with per-edge counts
- * @param {Number} [extend.top]
- * @param {Number} [extend.left]
- * @param {Number} [extend.bottom]
- * @param {Number} [extend.right]
+ * @param {(number|Object)} extend - single pixel count to add to all edges or an Object with per-edge counts
+ * @param {number} [extend.top]
+ * @param {number} [extend.left]
+ * @param {number} [extend.bottom]
+ * @param {number} [extend.right]
  * @param {String|Object} [extend.background={r: 0, g: 0, b: 0, alpha: 1}] - background colour, parsed by the [color](https://www.npmjs.org/package/color) module, defaults to black without transparency.
  * @returns {Sharp}
  * @throws {Error} Invalid parameters
@@ -358,10 +358,10 @@ function extend (extend) {
  *   });
  *
  * @param {Object} options - describes the region to extract using integral pixel values
- * @param {Number} options.left - zero-indexed offset from left edge
- * @param {Number} options.top - zero-indexed offset from top edge
- * @param {Number} options.width - width of region to extract
- * @param {Number} options.height - height of region to extract
+ * @param {number} options.left - zero-indexed offset from left edge
+ * @param {number} options.top - zero-indexed offset from top edge
+ * @param {number} options.width - width of region to extract
+ * @param {number} options.height - height of region to extract
  * @returns {Sharp}
  * @throws {Error} Invalid parameters
  */
@@ -388,7 +388,7 @@ function extract (options) {
  *
  * The `info` response Object will contain `trimOffsetLeft` and `trimOffsetTop` properties.
  *
- * @param {Number} [threshold=10] the allowed difference from the top-left pixel, a number greater than zero.
+ * @param {number} [threshold=10] the allowed difference from the top-left pixel, a number greater than zero.
  * @returns {Sharp}
  * @throws {Error} Invalid parameters
  */
diff --git a/lib/utility.js b/lib/utility.js
index 8bbad182..ace94dc7 100644
--- a/lib/utility.js
+++ b/lib/utility.js
@@ -39,10 +39,10 @@ try {
  * sharp.cache( { files: 0 } );
  * sharp.cache(false);
  *
- * @param {Object|Boolean} [options=true] - Object with the following attributes, or Boolean where true uses default cache settings and false removes all caching
- * @param {Number} [options.memory=50] - is the maximum memory in MB to use for this cache
- * @param {Number} [options.files=20] - is the maximum number of files to hold open
- * @param {Number} [options.items=100] - is the maximum number of operations to cache
+ * @param {Object|boolean} [options=true] - Object with the following attributes, or boolean where true uses default cache settings and false removes all caching
+ * @param {number} [options.memory=50] - is the maximum memory in MB to use for this cache
+ * @param {number} [options.files=20] - is the maximum number of files to hold open
+ * @param {number} [options.items=100] - is the maximum number of operations to cache
  * @returns {Object}
  */
 function cache (options) {
@@ -77,8 +77,8 @@ cache(true);
  * sharp.concurrency(2); // 2
  * sharp.concurrency(0); // 4
  *
- * @param {Number} [concurrency]
- * @returns {Number} concurrency
+ * @param {number} [concurrency]
+ * @returns {number} concurrency
  */
 function concurrency (concurrency) {
   return sharp.concurrency(is.integer(concurrency) ? concurrency : null);
@@ -124,8 +124,8 @@ function counters () {
  * const simd = sharp.simd(false);
  * // prevent libvips from using liborc at runtime
  *
- * @param {Boolean} [simd=true]
- * @returns {Boolean}
+ * @param {boolean} [simd=true]
+ * @returns {boolean}
  */
 function simd (simd) {
   return sharp.simd(is.bool(simd) ? simd : null);
diff --git a/package.json b/package.json
index 115f915e..7564bfc5 100644
--- a/package.json
+++ b/package.json
@@ -76,7 +76,7 @@
     "test-licensing": "license-checker --production --summary --onlyAllow=\"Apache-2.0;BSD;ISC;MIT\"",
     "test-coverage": "./test/coverage/report.sh",
     "test-leak": "./test/leak/leak.sh",
-    "docs-build": "for m in constructor input resize composite operation colour channel output utility; do documentation build --shallow --format=md --markdown-toc=false lib/$m.js >docs/api-$m.md; done && node docs/search-index/build",
+    "docs-build": "documentation lint lib && for m in constructor input resize composite operation colour channel output utility; do documentation build --shallow --format=md --markdown-toc=false lib/$m.js >docs/api-$m.md; done && node docs/search-index/build",
     "docs-serve": "cd docs && npx serve",
     "docs-publish": "cd docs && npx firebase-tools deploy --project pixelplumbing --only hosting:pixelplumbing-sharp"
   },
@@ -122,7 +122,7 @@
     "async": "^3.2.0",
     "cc": "^2.0.1",
     "decompress-zip": "^0.3.2",
-    "documentation": "^12.3.0",
+    "documentation": "^13.0.0",
     "exif-reader": "^1.0.3",
     "icc": "^1.0.0",
     "license-checker": "^25.0.1",