How to open JXL files

You downloaded a .jxl file, double-clicked it, and… nothing useful happened. That is because JPEG XL is a newer format that most operating systems and apps do not open by default yet. The good news: the file is fine, and there are several easy ways to view it. The fastest works on any device.

The fastest way: view it in your browser

You do not need to install anything. Open our JXL viewer, drop your file in, and the image appears instantly. Everything is decoded locally in your browser, so the file is never uploaded. If you want a copy that opens in any app afterwards, export it as PNG or JPG. This works the same on Windows, Mac, Android, and iPhone.

On Windows

Windows 10 has no built-in JPEG XL support. Windows 11 (version 24H2) can open .jxl files after you install the free JPEG XL extension from the Microsoft Store — once installed and after restarting the Photos app, files open natively and show thumbnails in Explorer. For a single file, the browser viewer for Windows is quicker. Desktop apps like XnView MP and IrfanView (with its plugin pack) can also open JXL.

On Mac

Recent versions of macOS can render JPEG XL through the system image framework, so Preview and Quick Look may already work. If your Mac or a specific app still refuses to open the file, use the browser viewer for Mac, which works in Safari and Chrome without any setup.

On Android and iPhone

Mobile support is inconsistent. iPhones running recent iOS can often preview JPEG XL because Apple supports the format, while many Android phones cannot. On either platform, opening the file in a mobile browser through an online viewer is the most reliable option, and you can save a PNG or JPG to your camera roll afterwards.

Desktop apps and editors

If you work with JXL regularly, free tools like GIMP, XnView MP, and ImageMagick support it, and you can use the official djxl command-line tool to convert .jxl to PNG. For occasional files, though, converting in the browser is simpler and keeps your images private.

Summary

JPEG XL support is improving quickly, but until your device opens .jxl natively, the easiest path is a no-install, no-upload viewer. Start with the online JXL viewer, confirm the image, and convert it if you need a widely-compatible copy.