API Reference

The Image API enables real-time image manipulation by appending query string parameters to image URLs.

TIP

All parameters support Base64 encoding. To utilize it, append "64" to the parameter name and base64 encode the parameter value.

auto_fix

Automatically adjust the brightness and contrast of an image.

GET /image.jpg?auto_fix=true HTTP/1.1

See Example

auto_level

Automatically adjust the white balance level of an image.

GET /image.jpg?auto_level=true HTTP/1.1

See Example

autorotate

Disable image autorotation based on EXIF orientation tag. Default value is true.

GET /image.jpg?autorotate=false HTTP/1.1

blur

Apply a blur effect to an image (0 to 100).

GET /image.jpg?blur=100 HTTP/1.1

See Example

brightness

Adjust the brightness of an image (-1.0 to 1.0).

GET /image.jpg?brightness=0.5 HTTP/1.1

See Example

bucket

Override the awsAuthorization S3 bucket name. Imagizer will continue to use the configure keys or IAM role for authorization to the specified bucket.

GET /image.png?bucket=my.s3.bucket HTTP/1.1

TIP

The bucket parameter can be restricted by setting the bucketsAllowedconfiguration or disabled completely using the Allow Dynamic Originconfiguration.

TIP

Specify the AWS region using the region parameter. In the absence of the region parameter, Imagizer will attempt to look up the region of the bucket.

cache_processed

Preprocess the image by applying all given parameters first before caching the origin image. All subsequent requests for the original image will return the modified cached version.

TIP

Works with POST Requests only.

Example: Perform redeye correction and auto_fix then cache the preprocessed image. The image will be cached at /image.jpg.

POST http://IMAGIZER_HOSTNAME/image.jpg HTTP/1.1
Content-Type: multipart/form-data;

file=@image.jpg
redeye=true
auto_fix=true
cache_processed=true

cache_queries

Pass an array of query strings to be preprocessed and cached.

TIP

Works with Post Requests and Async Requests only.

WARNING

Make sure to URL encode the cache_queries value.

Example: Preprocess and cache an image with a width of 200px, a width of 400px, and a height of 500px.
The following URLs will be processed and cached /image.jpg, /image.jpg?width=200, /image.jpg?width=400, and /image.jpg?height=500.

POST http://IMAGIZER_HOSTNAME/image.jpg HTTP/1.1
Content-Type: multipart/form-data;

file=@image.jpg
cache_queries[]=width%3D200
cache_queries[]=width%3D400
cache_queries[]=height%3D500

colorize

Applies an overall color to an image. This parameter takes an RGB value, hex, or color name.

GET /image.jpg?colorize=rgb(255,0,0) HTTP/1.1

See Example

TIP

Custom colors may be defined using the presetColors configuration.

colorize_intensity

Adjusts the intensity of the colorization. This parameter accepts an integer from 1 to 100. The default value is 1.

GET /image.jpg?colorize=green&colorize_intensity=50 HTTP/1.1

See Example

contrast

Adjust the contrast of an image (-1.0 to 1.0).

GET /image.jpg?contrast=1 HTTP/1.1

See Example

crop

Crop the image. There are eight different crop modes. See below for details on each.

TIP

Both the width and height parameters are required.

fit

Crop any excess image data outside the given width and height dimensions, after scaling has been completed. The crop will be centered on the image. The output image will match the dimensions precisely as given.

GET /image.jpg?width=400&height=300&crop=fit HTTP/1.1

See Example

top

Crop any excess image data outside the given width and height dimensions, after scaling has been completed. Crop from the top of the image down. The output image will match the dimensions precisely as given.

GET /image.jpg?width=400&height=300&crop=top HTTP/1.1

See Example

bottom

Crop any excess image data outside the given width and height dimensions, after scaling has been completed. Crop from the bottom of the image up. The output image will match the dimensions precisely as given.

GET /image.jpg?width=400&height=300&crop=bottom HTTP/1.1

See Example

pad

Scale an image to the given dimensions and fill the extra space with the given pad_color. The default pad_color is white.

GET /image.jpg?width=400&height=300&crop=pad HTTP/1.1

See Example

zoom

Zoom in on an image during rotation and crop out any extra white space.

TIP

Requires the rotate parameter.

GET /image.jpg?rotate=30&crop=zoom HTTP/1.1

See Example

Stretch

Stretch an image to the given dimensions. The output image will match the dimensions precisely as given while ignoring the original aspect ratio.

GET /image.jpg?width=250&height=250&crop=stretch HTTP/1.1

See Example

face

Crop the image around any detected faces.

GET /image.jpg?crop=face HTTP/1.1

See Example

entropy

Detect and return the area of interest of the image, crop out insignificant areas.

GET /image.jpg?crop=entropy HTTP/1.1

See Example

custom

Return a region of the image. The region is specified by four numbers representing x-coordinate, y-coordinate, width, and height separated by commas.

GET /image.jpg?crop=160,435,300,300 HTTP/1.1

TIP

Use center in place of the x-coordinate or y-coordinate values to automatically detect the center of the image.

WARNING

If the width parameter set it gets processed first. So when you generate custom crop values, make sure they are based on the scaled image.

See Example

dpr

Set the device pixel ratio (DPR). The device pixel ratio is the ratio between physical pixels and logical pixels. For example, the device pixel ratio of an iPhone 7 is 2, because the physical resolution is double the logical resolution.

GET /image.jpg?dpr=2&width=300 HTTP/1.1

TIP

The width and/or height parameters are required.

See Example

fill_flash

Adjust the fill flash of an image (0 to 1).

GET /image.jpg?fill_flash=1 HTTP/1.1

See Example

filter

Apply various effects to the image. Imagizer offers 20 different filters.

GET /image.jpg?filter=2 HTTP/1.1

See Example

flatten

Remove the alpha channel (transparency) from the image. Removing the alpha channel reduces the resulting image size, and therefore, can improve image delivery times.

GET /image-trans.png?flatten=1 HTTP/1.1

TIP

Use the pad_color parameter to specify the background color.

See Example

flip

Flip the image horizontally. To flip vertically, first rotate the image by 180 degrees.

GET /image.jpg?flip=true HTTP/1.1

See Example

format

Set the output format of the image. Supported output formats are JPEG, PNG, WEBP, and MP4.

GET /image.png?format=webp HTTP/1.1

TIP

Not all browsers support WEBP. Please see the supported browser list here.

WARNING

The mp4 format will be ignored unless conversion is performed on a GIF image.

See Example

format=auto

Automatically format the image into the most optimized version supported by the client. The default format is WEBP. If the client does not support WEBP, the output format will be set to JPEG, or PNG if the image has transparency.

GET /image.png?format=auto HTTP/1.1

See Example

gamma

Adjust the gamma of an image (-1 to 1).

GET /image.jpg?gamma=1 HTTP/1.1

See Example

height

Scale the image by the given height. The aspect ratio of the source image will be used to calculate the width.

GET /image.jpg?height=200 HTTP/1.1

TIP

You may also use the h alias (h=200).

See Example

TIP

If both the width and height are supplied, the image will be scaled to fit within the bounds of both dimensions while preserving the aspect ratio. Use the crop parameter to fit the image in the exact size specified.

highlight

Adjust the brightness of the image highlights (-1 to 1).

GET /image.jpg?highlights=1 HTTP/1.1

See Example

host_header

Override the Host header on the origin request to the image storage.

GET /img.jpg?host_header=images.example.com&origin=example.com HTTP/1.1

TIP

Works well with the origin parameter.

interlace

Set the output image as an interlaced (progressive) image.

GET /image.png?interlace=true HTTP/1.1

TIP

Supports PNG and JPEG only.

See Example

layers

Combine multiple images and text layers into one image. The layers parameter accepts a JSON array of layer objects.

GET /image.jpg?layers=<JSON> HTTP/1.1

WARNING

URL encoding of the JSON string is required for most clients.

Image layer object

Attribute	Description
url	A relative or absolute URL to the layer image.
pos	The position of the layer. Possible values are left, right, top and bottom (default center).
scale	Percentage to scale the layer to the source image. (default 100).
upscale	When true allow upscaling of the layer image. (default: true).
x	The X coordinate of the layer.
y	The Y coordinate of the layer.
alpha	Percentage of the transparency of the layer. (default 100).
offset	The number of pixels to offset the layer from the given position (default 0).
required	When true return an error when any individual layer fetch fails.

The JSON can look something like this:

[
  {
    "url": "/image-trans.png",
    "pos": "top|left",
    "scale": 50
  },
  {
    "url": "/image-trans.png",
    "pos": "top|right",
    "scale": 30
  },
  {
    "url": "/image-transparent.png",
    "pos": "bottom|left",
    "scale": 20
  },
  {
    "url": "/image-transparent.png",
    "pos": "bottom|right",
    "scale": 60
  }
]

See Example

Text layer object

In addition to Image Layer attributes, the Text Layer uses the following attributes:

Attribute	Description
color	The color of the text.
font	The font family, style and size in one declaration. Font size will increase the text quality. Use scale to change the size.
text	The text string to display.

Generates text in italic.

{
  "text": "Some text",
  "font": "italic"
}

Generates text in font size 20.

{
  "text": "Some text",
  "font": "20"
}

Generates text in Arial Bold.

{
  "text": "Some text",
  "font": "Arial Bold"
}

Combine all of the elements together.

{
  "text": "Some text",
  "font": "Arial italic 20"
}

The JSON string can look something like this:

[
  {
    "font": "arial bold 20",
    "text": "red",
    "color": "red",
    "pos": "top",
    "scale": 30
  },
  {
    "font": "Times 20",
    "text": "green",
    "color": "green",
    "pos": "center",
    "scale": 30
  },
  {
    "font": "italic 20",
    "text": "blue",
    "color": "blue",
    "pos": "bottom",
    "scale": 30
  }
]

Fonts

See Font List

font family	Styles
Andale Mono	Regular, normal
Arial Black	Regular, Standard
Arial	Regular, Bold, Italic
Bitstream Charter	Regular, Bold, Italic, Bold Italic
Century Schoolbook L	Bold, Italic, Bold Italic, Roman
cmex10	LyX
cmmi10	LyX
cmr10	LyX
cmsy10	LyX
Comic Sans MS	Regular, normal, Bold
Costar Brown	Regular, Light, Italic, Bold, Bold Italic, Light Italic
Courier 10 Pitch	Regular, Bold, Italic, Bold Italic
Courier New	Regular, Bold, Italic, Bold Italic
Cursor	Regular
DejaVu Sans	Bold, Oblique, Bold Oblique, Book, Condensed, Condensed Bold, ExtraLight
Dingbats	Regular
esint10	LyX
eufm10	LyX
Georgia	Regular, Bold, Italic, Bold Italic
Impact	Regular, Standard
Liberation Mono	Regular, Bold, Italic, Bold Italic
Liberation Sans	Regular, Bold, Italic, Bold Italic
Liberation Sans Narrow	Regular, Bold, Italic, Bold Italic
Liberation Serif	Regular, Bold, Italic, Bold Italic
msam10	LyX
msbm10	LyX
Nimbus Mono L	Regular, Regular Oblique, Bold, Bold Oblique
Nimbus Roman No9 L	Regular, Regular Italic, Medium, Medium Italic
Nimbus Sans L	Regular, Bold, Italic, Bold Italic, Regular Condensed, Bold Condensed, Bold Condensed Italic
Open Sans	Regular, Bold, Italic, Bold Italic, Semibold, Extrabold, Light
Playfair Display	Regular, Black, Medium, Bold, Italic, SemiBold, Bold Italic, ExtraBold Italic, SemiBold Italic, Medium Italic, Black Italic, ExtraBold
RedHat Display	Regular, Black, Medium, Bold, Italic, Light, SemiBold, ExtraBold, Black Italic, SemiBold, SemiBold Italic, Light Italic, ExtraBold Italic, BoldItalic
rsfs10	LyX
Spartan	Regular, Light, Medium, Thin, Black, Bold, SemiBold, ExtraBold, ExtraLight
Standard Symbols L	Regular
stmary10	LyX
Tahoma	Regular
Times New Roman	Regular, Bold, Italic, Bold Italic
Trebuchet MS	Regular, Bold, Italic, Bold Italic, Standard
URW Bookman L	Light, Light Italic, Demi Bold, Demi Bold Italic
URW Chancery L	Medium Italic
URW Gothic L	Book, Book Oblique, Demi, Demi Oblique
URW Palladio L	Bold, Bold Italic, Italic, Roman
Utopia	Regular, Bold, Italic, Bold Italic
Verdana	Regular, Bold, Italic, Bold Italic
wasy10	LyX
Webdings	Regular, normal

See Example

mark

Provides the location of the watermark image. May be a relative or absolute path.

GET /image.jpg?mark=<URL> HTTP/1.1

See Example

Watermarking can be globally set by using the ImageParamsAllowed config.

mark_alpha

Adjust the watermark alpha (0-100 where 0 means fully transparent and 100 is fully opaque).

GET /image.jpg?mark=<URL>&mark_alpha=true HTTP/1.1

TIP

Requires the mark parameter.

See Example

mark_scale

Scale the watermark to a percentage of the smallest dimension.

GET /image.jpg?mark=<URL>&mark_scale=60 HTTP/1.1

TIP

Requires the mark parameter.

See Example

mark_pos

Position the watermark within the source image. Possible values are top, right, bottom, and left; the default position is center.

GET /image.jpg?mark=<URL>&mark_pos=top HTTP/1.1

TIP

Requires the mark parameter.

See Example

mark_offset

Offset the watermark position by a given percentage.

GET /image.jpg?mark=/image-trans.png&mark_pos=top&mark_offset=40 HTTP/1.1

TIP

Requires the mark and mark_pos parameters.

See Example

mark_upscale

When true upscale the watermark image to better cover the image. The default value is false.

GET /image.jpg?mark=<URL>&mark_upscale=true HTTP/1.1

TIP

Requires the mark and mark_scale parameters.

See Example

mark_required

When true, return an error if the watermark image request fails, rather than returning an image missing the watermark.

GET /image.jpg?mark=<URL>&mark_required=true HTTP/1.1

meta

Return image metadata, including EXIF, and dominate color in JSON format.

GET /image.png?meta=true HTTP/1.1

See Example

/image.jpg?meta=true

{
  "fileSize": 4428575,
  "width": 4032,
  "height": 3024,
  "fileType": "jpeg",
  "mimeType": "image/jpeg",
  "hasAlpha": false,
  "colorSpace": "srgb",
  "exif": {
    "ApertureValue": "2159/1273",
    "BrightnessValue": "3497/314",
    "DateTime": "2017:04:02 16:08:21",
    "DateTimeDigitized": "2017:04:02 16:08:21",
    "DateTimeOriginal": "2017:04:02 16:08:21",
    "ExifImageLength": 3024,
    "ExifImageWidth": 4032,
    "ExifOffset": 180,
    "ExifVersion": "48, 50, 50, 49",
    "ExposureBiasValue": "0/1",
    "ExposureMode": 0,
    "ExposureProgram": 2,
    "ExposureTime": "1/3690",
    "Flash": 24,
    "FNumber": "9/5",
    "FocalLength": "399/100",
    "FocalLengthIn35mmFilm": 28,
    "ISOSpeedRatings": 20,
    "Make": "Apple",
    "MeteringMode": 5,
    "Model": "iPhone 7",
    "Orientation": 1,
    "ResolutionUnit": 2,
    "SensingMethod": 2,
    "ShutterSpeedValue": "29588/2497",
    "Software": 10.3,
    "SubjectArea": "2015, 1511, 2217, 1330"
  },
  "faces": [],
  "server": {
    "host": "ip-10-0-1-96",
    "ip": "10.0.1.96"
  },
  "dominateColor": "#4C719F"
}

face

Return facial coordinates along with meta data.

GET /image.png?meta=true&face=true HTTP/1.1

TIP

Requires the meta parameter.

See Example

{
  "fileSize": 215707,
  "width": 1710,
  "height": 1140,
  "fileType": "jpeg",
  "mimeType": "image/jpeg",
  "hasAlpha": false,
  "colorSpace": "srgb",
  "exif": {
    "ColorSpace": 65535,
    "ExifOffset": 90,
    "ExifVersion": "48, 50, 50, 49",
    "Orientation": 1,
    "Software": "Adobe Photoshop CS6 (Macintosh)"
  },
  "faces": [
    {
      "xPos": 926,
      "yPos": 524,
      "width": 137,
      "height": 137
    },
    {
      "xPos": 1012,
      "yPos": 311,
      "width": 140,
      "height": 140
    },
    {
      "xPos": 516,
      "yPos": 228,
      "width": 200,
      "height": 200
    },
    {
      "xPos": 1163,
      "yPos": 148,
      "width": 157,
      "height": 157
    },
    {
      "xPos": 125,
      "yPos": 362,
      "width": 285,
      "height": 285
    }
  ],
  "server": {
    "host": "ip-10-0-1-81",
    "ip": "10.0.1.81"
  },
  "jpeg": {
    "colorspace": 2,
    "sampling-factor": "2x2,1x1,1x1"
  }
}

include_image_data

Include the image data, embedded in the metadata JSON object, as a base64 string.

GET /image.jpg?meta=true&include_image_data=true HTTP/1.1

TIP

Requires the meta parameter.

See Example

{
  "fileSize": 4428575,
  "width": 4032,
  "height": 3024,
  "fileType": "jpeg",
  "mimeType": "image/jpeg",
  "hasAlpha": false,
  "colorSpace": "srgb",
  "exif": {},
  "faces": [],
  "imageData": "...",
  "server": {
    "host": "ip-10-0-1-96",
    "ip": "10.0.1.96"
  }
}

origin

Override the image storage backend server.

GET /image.png?origin=http://images.example.com HTTP/1.1

TIP

The origin parameter can be restricted by setting the Hostname Allowed config or disabled completely using the Allow Dynamic Origin config.

pad

Add padding around an image with a given pad_color as a hex string. The default color is white.

GET /image.jpg?pad=30 HTTP/1.1

TIP

See the crop parameter to automatically pad images.

See Example

pad_color

Set the color of the padding.

Some of the predefined values are: white, black, red, green, blue, yellow, magenta, and cyan. pad_color will also accept a hex string (e.g. fff, ffffff).

GET /image.jpg?pad=30&pad_color=555 HTTP/1.1

TIP

Requires the pad, crop, rotate, or flatten parameters.

TIP

Use pad_color=0000 to pass transparent.

See Example

quality

Set the image quality. A lower setting will reduce the file size. Possible value ranges from 1 to 100. The quality of the initial image will be applied if the quality parameter is not explicitly set. If the initial image quality cannot be detected, a quality of 90 will be applied.

GET /image.jpg?quality=80 HTTP/1.1

See Example

auto New!

The value of auto will automatically determine the optimal quality for the image to achieve the smallest file size while maintaining the perceived visual quality.

Imagizer employs binary search and image similarity algorithms to make multiple attempts at compressing the image. It then compares the results with the original image to identify the best quality setting.

The algorithm is based off the jpeg-archive library.

GET /image.jpg?quality=auto HTTP/1.1

See Example

TIP

Use the quality_attempts, quality_method, quality_preset, quality_target, quality_min, and quality_max parameters to customize the auto quality behavior dynamically.

See the Auto Quality config reference to customize the default values and presets.

WARNING

The auto quality setting is resource intensive and will take longer to process than a fixed quality setting.

quality_attempts New!

The number of binary search steps to perform when using the quality=auto. The default value is 6. Lowering this number will reduce the processing time but may result in a lower quality image.

GET /image.jpg?quality=auto&quality_attempts=3 HTTP/1.1

quality_method New!

Specify the image comparison algorithm to use for auto quality. The default value is ssim.

GET /image.jpg?quality=auto&quality_method=mpe HTTP/1.1

Method	Description
ssim	Structural Similarity
mpe	Mean Pixel Error
smallfry	Linear-weighted BBCQ-like Smallfry

quality_preset New!

Specify the preset target for the image compare algorithm. The default value is medium.

GET /image.jpg?quality=auto&quality_preset=medium HTTP/1.1

Preset	ssim	mpe	smallfry
low	0.999	1.5	100.75
medium	0.9999	1.0	102.25
high	0.99995	0.8	103.8
veryhigh	0.99999	0.6	105.5

See Example

quality_target New!

Specify the target for the image compare algorithm. This parameter takes precedence over the quality_preset parameter.

GET /image.jpg?quality=auto&quality_target=.99 HTTP/1.1

See Example

quality_min New!

Specify the minimum quality setting to use when compressing the image. The default value is 40.

GET /image.jpg?quality=auto&quality_min=25 HTTP/1.1

quality_max Coming soon!

Specify the maximum quality setting to use when compressing the image. The default value is 90.

GET /image.jpg?quality=auto&quality_max=80 HTTP/1.1

recognition

WARNING

At present, the recognition feature is exclusively accessible through our cloud service. https://cloud.imagizer.com.

nsfw

Detect if an image contains nudity.

GET /image.png?recognition=nsfw HTTP/1.1

See Example

Example JSON response object:

{
  "nsfw": {
    "nudity": {
      "confidence": 98.48,
      "value": false
    }
  }
}

labels

Utilize the recognition capability to detect and retrieve a collection of labels that describe the image. With recognition, you can identify numerous objects such as vehicles, pets, or furniture, accompanied by a confidence score. Additionally, recognition is capable of detecting various scenes within an image, such as a sunset or beach.

GET /image.png?recognition=labels HTTP/1.1

See Example

Example JSON response object:

{
  "labels": [
    {
      "Name": "Animal",
      "Confidence": 98.966850280762
    },
    {
      "Name": "Horse",
      "Confidence": 98.966850280762
    },
    {
      "Name": "People",
      "Confidence": 98.813423156738
    },
    {
      "Name": "Human",
      "Confidence": 98.749732971191
    },
    {
      "Name": "Cafe",
      "Confidence": 87.56616973877
    },
    {
      "Name": "Vehicle",
      "Confidence": 83.645690917969
    },
    {
      "Name": "Bazaar",
      "Confidence": 71.16487121582
    },
    {
      "Name": "Market",
      "Confidence": 71.16487121582
    },
    {
      "Name": "Carriage",
      "Confidence": 67.355987548828
    },
    {
      "Name": "Horse Cart",
      "Confidence": 67.355987548828
    }
  ]
}

redeye

Apply red-eye correction to any detected faces.

GET /image.jpg?redeye=true HTTP/1.1

See Example

region

Override the awsAuthorization S3 region.

GET /image.png?bucket=my.s3.bucket&region=us-west-1 HTTP/1.1

TIP

Requires the bucket parameter.

resolve

Provide a custom address for a specific host and port pair. Using resolve, you can perform origin image fetches using a specified address which will prevent the otherwise normally resolved address to be used.

GET /image.png?origin=https://www.example.com&resolve=www.example.com:80:192.0.2.1 HTTP/1.1

TIP

Requires the origin parameter.

rotate

Rotate the image clockwise N degrees.

GET /image.jpg?rotate=90 HTTP/1.1

TIP

Many JPEG files have a tag in the header giving the image orientation. If there’s an orientation tag, Imagizer automatically applies and removes it. Use autorotate=false to disable that function.

TIP

Rotating the image by degrees smaller than 90 will result in padding the background. Use the zoom crop to auto crop out the padding or use the pad_color to set the padding color.

TIP

Use the angle parameter to rotate the image counterclockwise.

See Example

saturation

Adjust the saturation of the image (-1 to 1).

GET /image.jpg?saturation=1 HTTP/1.1

See Example

shadow

Adjust the brightness of the image shadows (-1 to 1).

GET /image.jpg?shadow=1 HTTP/1.1

See Example

sharp_amount

Set the overall strength of the sharpening effect (1 to 100).

GET /image.jpg?sharp_amount=100 HTTP/1.1

See Example

sharp_radius

Set the size of the edges to enhance (1 to 100).

GET /image.jpg?sharp_amount=100&sharp_radius=100 HTTP/1.1

TIP

Requires the sharp_amount parameter.

See Example

source_url

Provide the full URL of the origin image including the hostname.

GET /?source_url=http://example.com/image1.jpg?width=100 HTTP/1.1

TIP

The source_url parameter can be disabled in config.

strip_exif

Strip all EXIF data from the image. In some cases you can significantly reduce an image file size by stripping EXIF data.

GET /image.png?strip_exif=true HTTP/1.1

trim

Trim the image to remove a border around the image. By default the border color white is trimmed. See trim_color to change the color.

GET /image.png?trim=color HTTP/1.1

See Example

trim_color

The color to trim when trim=color.

Some of the predefined values are: white, black, red, green, blue, yellow, magenta, and cyan. trim_color will also accept a hex string (e.g. fff, ffffff).

GET /image.png?trim=color&trim_color=555 HTTP/1.1

TIP

Requires the trim parameter.

See Example

vibrance

Adjust the vibrance of an image (-1 to 1).

GET /image.jpg?vibrance=1 HTTP/1.1

See Example

warmth

Adjust the warmth of an image (-1 to 1).

GET /image.jpg?warmth=1 HTTP/1.1

See Example

width

Scale the image by the given width. The aspect ratio of the source image will be used to calculate the height.

TIP

You may also use the w alias (ex: w=200).

GET /image.jpg?width=200 HTTP/1.1

See Example