Convert JPEG XL to WebP
WebP is the format the web already agrees on: every major browser, CDN and image service reads it, and it beats JPG on file size for the same visual quality. When you have JPEG XL (.jxl) files and need something a content pipeline, a CMS, or a social platform will accept, WebP is a natural destination. This converter decodes .jxl and re-encodes to WebP entirely in your browser, using the JPEG XL decoder compiled to WebAssembly. A quality slider (default 90%) lets you balance size against fidelity, and any transparency in the source is carried over. The whole job is local: no uploads, no server, no file-size limits, no watermark, offline-capable after the codec loads once. One honest caveat: WebP *export* depends on your browser's canvas support. Chrome and Firefox export it natively; very old Safari versions (15 and earlier) cannot, and the tool will tell you plainly to use JPG or PNG output instead.
Drop JPEG XL files here or click to browse
Processed locally — files never leave your device
How to use
- Drop your .jxl files into the box, or click it to browse.
- Drag the quality slider — lower means a smaller WebP file.
- Decoding and re-encoding run locally via WebAssembly.
- Download the converted WebP images.
Frequently asked questions
Why target WebP instead of JPG or PNG?
WebP sits between the two: much better compression than JPG for photos, transparency support like PNG, and universal acceptance in browsers, CDNs and web services. It's the natural format when the destination is a website or app.
Are my .jxl files uploaded anywhere?
No. The JPEG XL decoder and WebP encoder run inside your browser as WebAssembly. Nothing leaves your device, and conversion works offline after the codec loads once.
What quality setting should I use?
90% is a solid default for photos. For large web assets where size matters, 75–80% is usually visually indistinguishable for typical photos; below that you'll start to see artifacts on fine detail.
Is transparency preserved?
Yes. If your .jxl source has an alpha channel, the WebP output keeps it. WebP handles transparency efficiently, which is why it beats JPG for logos and graphics.
The tool says my browser can't export WebP — what now?
WebP export needs modern canvas support. Very old Safari releases (15 and earlier) lack it. Use JXL to JPG instead — JPG is the safe fallback on every system. Chrome, Firefox and current Safari all export WebP fine.
Is WebP better than JXL?
Not in quality — JXL compresses better and supports lossless and animation. The advantage of WebP is reach: it is already accepted by essentially every web stack. Converting .jxl to WebP is about making files usable in today's pipeline.
Do browsers support JPEG XL?
Safari has rendered .jxl still images since version 17 (2023); Firefox 157 (September 2026) enables it by default; Chrome has merged a decoder but default-on support is still pending. Browsers are increasingly comfortable with JXL directly — this tool is for everything else that isn't yet.
Related tools
For lossless output try JXL to PNG; for maximum compatibility use JXL to JPG. Going the other way, compress with WebP to JXL or PNG to JXL.