Quality transformation

Name

Description

Value range

q

• Sets the relative quality of the image by compressing it to a percentage of its original quality. For example, if the original image quality is 100%, using 90q results in an image with 90% quality. If the original image quality is 80%, using 90q results in an image with 72% quality.

• Relative compression is effective only for original images in JPG format. If the original image is in WEBP format, relative quality is the same as absolute quality.

• When the value is lossless, WEBP images are saved in a lossless format.

1-100, lossless

Q

• Sets the absolute quality of the image. The image is compressed to Q% quality. If the original image quality is lower than the specified value, the image is not compressed. For example, if the original image quality is 100%, using 90Q results in an image with 90% quality. If the original image quality is 95%, using 90Q also results in an image with 90% quality. If the original image quality is 80%, using 90Q does not compress the image and returns the original image with 80% quality.

• This parameter is effective only when the output format is JPG or WEBP. It has no effect on other formats. If a transformation URL specifies both q and Q, the Q parameter takes precedence.

• When the value is lossless, WEBP images are saved in a lossless format.

1-100, lossless