- Fastly Status
Last updated April 17, 2017
By adding the transformation URL API query string parameters to your existing image URLs, images can be resized, cropped, rotated, compressed, and transcoded into different image formats for increased performance. Image transformations can be applied programmatically and on-demand, eliminating the need to batch process or maintain multiple copies of an image to support different sizes and characteristics of device viewing your image content.
Resize an image to 200px wide.
Although the URL API parameters can be specified in any order, we normalize the transformation sequence within our system to the following order:
Input and output formats
The source image can use any of the following image formats:
The optimized image can use any of the following image formats:
Input and output limits
- The maximum input and output image dimensions are 8,000×8,000 pixels.
- The maximum input image file size is 50 Megabytes.
Default quality level
When no quality value is specified, a default value of 85 is automatically applied. The quality parameter will be ignored by GIF and PNG output formats.
Meta data removal
To optimize your images for delivery, all metadata (for example, EXIF, XMP, or ICC) is removed to reduce file size. If an image contains an ICC profile, the data is applied directly to the image to ensure color output is correct.
WebP image support
WebP images can be delivered to supported browsers by adding the