Output image quality for lossy file formats.
quality parameter enables control over the compression level for lossy file-formatted images.
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.
qualityparameter can be applied to the following output formats:
- If no
qualityparameter is present for
webp, the output image will be returned at the default value set in the Image Optimizer user interface.
auto=webpis enabled by the URL or the service settings, the second value will be used as the quality value if the requestor sends the
accept: 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.
Click the links to view the transformed image using a demo Fastly IO service.