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The web was designed from the start to solve this problem and you can serve alternate formats to user agents which will select the one they support.

• dpark 11mo ago
  Your statement here amounts to “you can serve JPEG XL to other browsers, just not Chrome”. Yeah, that’s what I said.
  • jeffbee 11mo ago
    This is the way of web. Sites don't get to dictate what the user agent does. The clue is in the name: user agent.
    • dpark 11mo ago
      Okay. So putting it together… If the user agent does not support JPEG XL, then you cannot use it. “Nobody is stopping you from using jpegxl” except Google.