Convert JPEG XL images (JXL) to JPG locally - no upload, right in your browser. JPG opens in virtually every program.
Running locally on your device ...
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Your files never left your device
No. Everything runs in your browser - your file never leaves your device. How this is verifiable
JPEG XL (JXL) is a very efficient image format that even supports lossless storage. The catch: barely any browser or program opens JXL reliably yet - Chrome removed its support again, others do not display it at all. As JPG, by contrast, your image works everywhere.
The JXL is decoded locally with a self-hosted codec and exported as JPG; transparent areas are filled with white. Nothing is ever uploaded - the conversion runs entirely in the browser.
JPEG XL was designed, among other things, as a modern successor to classic JPG and meant to replace both: small photos and lossless graphics. In practice it has stalled on hesitant browser adoption, which is why you often need the route back to JPG just to send, upload or display a JXL file at all. If your JXL comes from a lossless source, the exported JPG is of course lossy - for maximum edge sharpness choose JXL to PNG instead.
| Input formats | JXL |
|---|---|
| Output format | JPG |
| Batch processing | Yes |
| Processing | Locally in your browser (WebAssembly) |
| File upload | None |
Limitations: JPG cannot store transparency; transparent areas become white. If you need transparency, use JXL to PNG. JPG is larger than JXL at the same quality, but readable everywhere.
No. The conversion runs entirely in the browser - even in airplane mode.
JXL is still barely supported by any browser or program. As JPG the image works everywhere.
Use JXL to PNG for that; JPG has no transparency.
Yes, download individually or as a ZIP.