jarvisbox

JPEG XL to GIF Converter

Decode a .jxl image and export it as an animated GIF — useful while end-user platforms still lack JPEG XL support. Encoding uses ffmpeg.wasm locally.

100% client-side · ffmpeg.wasm · no upload

Pick a JPEG XL file to begin.

How to convert JXL to GIF

  1. Pick your .jxl file.
  2. Choose a target width.
  3. Press Convert to GIF and download.

Common use cases

Frequently asked questions

Why might decoding fail?

Some JXL files use features (lossless mode, animation, HDR) that older ffmpeg.wasm builds don't fully decode. Re-encoding from source helps.

Why isn't there native JXL support in my browser?

Chromium removed default JXL support; Safari 17+ added it. This tool decodes via ffmpeg.wasm so it works regardless.

Related: AVIF to GIF · WebP to GIF · APNG to GIF · All animation tools

回報這個工具的問題