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Format: fm#

The fm parameter is used to convert the image to a specified format. The following image formats are supported:

  1. JPEG
  2. PNG
  3. GIF
  4. WEBP
  5. AVIF
  6. JXL

Output quality: q#

The q parameter controls the output quality of the image for lossy formats, including JPEG, WEBP, AVIF, and JXL. The valid values for q range from 0 to 100, with a default value of 75. If the Save-Data client hint is enabled, the value of q is set to 45.

The following quality strings are supported for quality hunting:

  1. auto
  2. auto:high
  3. auto:med
  4. auto:low