JPEG XL to WebP converter
Convert a JPEG XL into a WebP right here on the page. WebP is the usual choice for web images where page weight is a ranking and conversion factor. The practical difference is that the result opens anywhere, which JPEG XL files do not. Your file never leaves your computer.
Need the other direction? Convert WebP to JPEG XL
How to convert JPEG XL to WebP
- 1 Drop your JPEG XL .jxl file onto the page, or click to browse for it.
- 2 Set the quality, or leave the default, which keeps the file small without anything showing.
- 3 Convert. The work happens on your own machine, so how long it takes depends on your computer and the file.
- 4 Download the WebP, or add more files and do the whole set in one go.
Why convert JPEG XL to WebP
- A JPEG XL will not open in a browser, so anything going onto a web page, into a document or into a message has to become a WebP first.
- Substantially smaller than JPEG and PNG at matching quality.
- One format covers photos, flat graphics, transparency and animation.
- Replacing PNG for transparent graphics at a fraction of the size.
- JPEG XL: browser support is still inconsistent and politically contested.
JPEG XL compared with WebP
How the two formats differ on the things that decide whether a conversion is worth making.
| Property | JPEG XL | WebP |
|---|---|---|
| File extension | .jxl | .webp |
| Colour depth | Up to 32 bits per channel, HDR | 8 bits per channel |
| Browser support | Some browsers | Every browser |
| Introduced | 2021 | 2010 |
| Developed by | JPEG Committee |
Quality and what changes
WebP stores the same content under a different set of rules, so what matters here is compatibility rather than picture quality. Convert once from the best source you have rather than through a chain of intermediate files.
- One WebP limitation to keep in mind: strongly coloured edges soften a little at smaller file sizes.
Questions about JPEG XL to WebP
Is there a maximum size for WebP?
Yes, WebP is limited to 16383 x 16383 pixels. Images beyond that have to be scaled down or split before they can be written, which is a property of the format rather than of this tool.
Is my JPEG XL file uploaded anywhere?
No. The whole thing runs inside the browser tab you already have open. Your JPEG XL is read straight from your own disk, converted on your machine and handed back as a WebP. Nothing is sent anywhere, nothing is stored and there is no account.
Is there a file size limit?
There is no server-side limit because no server sees the file. The real ceiling is your device memory, since the input and the output both have to fit in the tab. A few hundred megabytes is usually fine on a desktop machine and considerably less on a phone.
Can I convert several JPEG XL files at once?
Yes. Add as many as you like and they are processed one after another, then offered as separate WebP downloads or as a single ZIP. Speed depends on your own processor rather than on a queue.
Does the converter work offline?
Yes, after the page has loaded once. The engine is cached by the browser, so you can disconnect, reload and keep converting. That falls out of doing the work locally rather than being a separate mode you switch on.