Convert JPG to JPEG XL
Re-encode your JPGs as JPEG XL (.jxl) and get the same picture in a smaller file — usually 20–60% lighter than the JPG, or the same weight with visibly better quality. It runs on libjxl right in your tab. Start at quality 75 for the best size/fidelity balance, then nudge up for archival shots. It takes PNG input too. The reason people still convert rather than just serve .jxl: outside a few browsers, editors and apps are still catching up — the FAQ below has the current support rundown.
Drop JPG or PNG files here or click to browse
Processed locally — files never leave your device
How to use
- Drop your JPG or PNG files into the box, or click it to browse.
- Drag the quality slider — lower means smaller .jxl files.
- Encoding runs locally in your browser via WebAssembly.
- Download the converted .jxl images.
Frequently asked questions
What is JPEG XL (.jxl)?
JPEG XL is the successor to JPEG: same visual quality at a fraction of the file size, plus lossless mode, animation and HDR support. Safari displays .jxl still images since 2023, Chrome shows them by default from version 155 (October 2026), and Firefox enables them by default in version 158 (October 2026).
Are my images uploaded anywhere?
No. Encoding runs in your browser via WebAssembly on your own device. Nothing is transmitted, stored or logged.
Which apps can open .jxl files?
Safari displays .jxl still images since version 17 (2023), Chrome shows them by default from version 155 (October 2026), and Firefox enables them by default in version 158 (October 2026). For editing and publishing, support is still growing — use this converter's JPG output if you need maximum compatibility elsewhere.
What quality setting should I choose?
75 is a solid default for photos. Use 90+ for near-lossless archiving, 40–60 for web thumbnails. Lower settings dramatically shrink the file.
How much smaller are JXL files compared to JPG?
Typically 20–60% smaller at the same visual quality. The exact savings depend on image content — photos with fine detail compress less than smooth gradients.
Can I convert JXL back to JPG?
Yes — use our JXL to JPG tool to decode .jxl files into universally compatible JPG (or JXL to PNG for lossless).
Is JXL better than AVIF or WebP?
JXL offers the best combination of quality, speed, and features. It supports both lossy and lossless compression, animation, HDR, and transcodes losslessly from existing JPGs. AVIF is better for very low bitrates but slower to encode.
Related tools
Need to decode JXL? Try JXL to JPG. For other conversions, check AVIF to JPG, HEIC to JPG, or WebP to JPG.