Convert JPEG XL to WebP
Drop a JPEG XL file below and get a WebP back. The conversion happens on your own machine, so nothing is uploaded and there is no size or quantity limit beyond what your browser can hold in memory.
Drop images here
Accepts JPEG XL
Lower means a smaller file. 75 is a good default for photos.
100% in your browser Files are never uploaded.
Why convert JPEG XL to WebP?
Plenty of websites, content management systems and older desktop programs reject JPEG XL uploads outright. WebP is accepted just about everywhere, and that alone accounts for most of these conversions.
Expect the WebP file to come out larger than the JPEG XL you started with. That is the price of the broader compatibility and simpler decoding WebP gives you.
Both formats are lossy. Every re-encode discards a little more detail, so it is worth starting from the original rather than from a copy that has already been through this a few times.
JPEG XL vs WebP at a glance
| Property | JPEG XL | WebP |
|---|---|---|
| Compression | Lossy | Lossy |
| Transparency | Yes | Yes |
| Typical file size | 45-60% of an equivalent JPEG | 65-75% of an equivalent JPEG |
| Compatibility | Safari and recent Chrome; still uncommon elsewhere | Supported by all current browsers and most apps |
| Usually comes from | Long-term archives and photography workflows | Websites optimising page weight |
Frequently asked questions
Are my JPEG XL files uploaded anywhere?
No. The decoder and encoder are WebAssembly modules that run inside this page. You can verify it by opening your browser’s network tab — converting a file produces no outbound requests. You could even disconnect from the internet after the page loads and it would still work.
Is there a file size or quantity limit?
There is no limit imposed by us. The practical ceiling is your device’s memory, since the image has to be held uncompressed while converting. On a typical laptop, images up to around 100 megapixels convert without trouble.
Will converting to WebP lose quality?
WebP is a lossy format, so some data is discarded. At the default quality setting the difference is not visible at normal viewing sizes. If you need an exact copy of the pixels, choose PNG instead.
Does it work on a phone?
Yes. The same WebAssembly modules run on mobile browsers. Conversion is slower than on a desktop because phone CPUs are weaker, and very large images are more likely to hit memory limits.
What produces JPEG XL files?
Mostly archiving workflows and photography software that adopted it early. It is not something a camera or phone hands you. If you have one, it most likely came from someone deliberately choosing it for storage quality.
Is WebP safe to use on a website?
Yes. Every current browser supports it, which covers roughly 97% of visitors. The remaining gap is old software rather than old browsers — a few desktop image viewers and older CMS upload forms still refuse it.