Convert AVIF to WebP
Drop a AVIF 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 AVIF
Lower means a smaller file. 75 is a good default for photos.
100% in your browser Files are never uploaded.
Why convert AVIF to WebP?
Plenty of websites, content management systems and older desktop programs reject AVIF 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 AVIF 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.
AVIF vs WebP at a glance
| Property | AVIF | WebP |
|---|---|---|
| Compression | Lossy | Lossy |
| Transparency | Yes | Yes |
| Typical file size | 40-55% of an equivalent JPEG | 65-75% of an equivalent JPEG |
| Compatibility | All current browsers; some older desktop apps lag behind | Supported by all current browsers and most apps |
| Usually comes from | Websites optimising page weight | Websites optimising page weight |
Frequently asked questions
Are my AVIF 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.
Where do AVIF files come from?
Almost always from a website. AVIF compresses better than anything else in wide use, so sites that care about page weight serve it. Cameras and phones do not produce it, which is why most people only meet AVIF when saving an image from the web.
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.