Can I set an exact quality level instead of a profile?

Yes - providing a quality value from 1-100 overrides the chosen profile's default.

Which format compresses best?

WebP and AVIF typically produce smaller files than JPEG or PNG at similar visual quality, if your use case supports those formats.

Reduce an image's file size in JPEG, PNG, WebP, or AVIF, using a compression profile or a custom quality level.

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Upload the image you want to compress.
Choose an output format and a compression profile (low, balanced, high, or maximum), or set a custom quality level.
Download the smaller file.

Reduce an image's file size using a compression profile or a custom quality level, in JPEG, PNG, WebP, or AVIF.

Can I set an exact quality level instead of a profile?: Yes - providing a quality value from 1-100 overrides the chosen profile's default.
Which format compresses best?: WebP and AVIF typically produce smaller files than JPEG or PNG at similar visual quality, if your use case supports those formats.