Depends on the format I'm targeting. PNG: zopflipng https://github.com/google/zopfli/blob/master/README.zopflipng https://github.com/google/zopfli/blob/master/

Depends on the format I'm targeting. PNG: zopflipng https://github.com/google/zopfli/blob/master/README.zopflipng https://github.com/google/zopfli/blob/master/README.zopflipn... AVIF: libavif https://github.com/AOMediaCodec/libavif https://github.com/AOMediaCodec/libavif JPG (for backwards compatibility when there's no AVIF): mozjpeg https://github.com/mozilla/mozjpeg https://github.com/mozilla/mozjpeg