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by dchest 1524 days ago
JXL without container has a very short header, which is nice.

WebP is 38 bytes, and is already supported by browsers.

  00000000  52 49 46 46 24 00 00 00  57 45 42 50 56 50 38 4c  |RIFF$...WEBPVP8L|
  00000010  18 00 00 00 2f ff c0 3f  00 07 50 e8 d6 16 ba ff  |..../???..P??.??|
  00000020  01 00 45 fa ff 9f 22 fa  9f fa df 7f              |..E??."?.??.|


  data:image/webp;base64,UklGRiQAAABXRUJQVlA4TBgAAAAv/8A/AAdQ6NYWuv8BAEX6/58i+p/6338=

Maybe can be made smaller, I just used cwebp -z 9.