quality
Output image quality for lossy file formats.
The quality parameter enables control over the compression level for lossy file-formatted images.
Syntax
quality={value}quality={value},{autoWebpQuality}value may be any integer between 1 and 100, where 1 is a lower quality image and a smaller file and 100 is the highest quality image and larger file. If desired, a second quality level can be specified for use when auto=webp is enabled and a WebP output format has been selected.
Notes
- The
qualityparameter can be applied to the following output formats:avif,jpg,pjpg,png8,webpandwebply. - If no
qualityparameter is present forjpg,pjpg, orwebp, the output image will be returned at the default value set in the Image Optimizer web interface. - If
auto=webpis enabled by the URL or the service settings, the second value will be used as the quality value if the requestor sends theaccept: image/webprequest header. - When only specifying
quality, if the output image file size is larger than the input image, the original image will be delivered. - This does not include a way of specifying auto AVIF quality.
Examples
Click the links to view the transformed image using a demo Fastly IO service.
| Example usage | Description |
|---|---|
?quality=85 | Output an image with quality set to 85. |
?format=pjpg&auto=webp&quality=85,75 | Convert the image format to a progressive jpg with image quality set to 85. For browsers that support WebP set the image quality to 75. |
User contributed notes
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