Convert JPEG XL to WebP
WebP is the format the web already agreed on — every major browser, CDN and image service reads it. So when you've got .jxl files and need something a CMS or social platform will actually accept, WebP is an easy landing spot. This decodes the .jxl and re-encodes to WebP in your tab, with a quality slider (90% default) and transparency carried straight through. One thing to flag: WebP export leans on your browser's canvas — Chrome and Firefox can, but Safari (any version) cannot and would silently return a PNG, so on Safari the tool tells you and points you to JXL to JPG or JXL to PNG 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 a canvas encoder your browser supports. Chrome and Firefox have one; Safari does not (any version) — it would hand back a PNG, so the tool detects that and stops rather than mislabelling a file. Use JXL to JPG or JXL to PNG instead — JPG is the safe fallback on every system.
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); Chrome enables them by default from version 155 (October 2026) and Firefox from version 158 (October 2026). 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. Starting from JPG/PNG and want WebP? JPG to WebP or PNG to WebP.