WebP to AVIF Converter: Free & Private
You are already on a modern format and want the next one. Convert it here, in your browser, with nothing uploaded anywhere.
Why convert WebP to AVIF?
Both formats come from video codecs. WebP from VP8, AVIF from AV1, and AVIF is the newer generation. Be sceptical of the headline claims though: on our own measurements, at the encoder settings that keep conversion times reasonable, AVIF and WebP land within a few percent of each other on an ordinary photograph. Where AVIF genuinely pulls ahead is the difficult material, dark scenes, film grain, and wide smooth gradients that WebP renders in visible steps.
The catch worth knowing about
This is the one conversion on the site we would talk you out of for a whole library. Both formats are lossy, so you pay another compression generation, the byte saving is often close to zero, and AVIF takes several times longer to encode. Do it for specific images that band or smear as WebP, not as a bulk migration.
One tip before you start
Converting from the original source rather than from an already-compressed WebP always gives a better result. Use this page when the WebP is all you have.
WebP vs AVIF, quick comparison
| Property | WebP | AVIF |
|---|---|---|
| Best for | Google's modern web format. Excellent compression with transparency and animation support. | The newest generation format (AV1 image). Best compression of all, but support is still growing. |
| File size | Roughly 25-35% smaller than JPG | About 40% of the JPG size; close to WebP |
| Transparency | Yes, full 8-bit alpha | Yes, full 8-bit alpha |
| Where it opens | Every browser; patchy in desktop and print software | All current browsers; rare outside them |
How to convert WebP to AVIF
- Drop your WebP files into the box above (or click to browse).
- Press Convert, the encoder loads the first time you use it, then each image takes a moment. It all runs on your device.
- Download each converted file, or grab them all as a ZIP.
Frequently asked questions
Why would I convert WebP to AVIF?
You are already on a modern format and want the next one. Both formats come from video codecs. WebP from VP8, AVIF from AV1, and AVIF is the newer generation. Be sceptical of the headline claims though: on our own measurements, at the encoder settings that keep conversion times reasonable, AVIF and WebP land within a few percent of each other on an ordinary photograph. Where AVIF genuinely pulls ahead is the difficult material, dark scenes, film grain, and wide smooth gradients that WebP renders in visible steps.
What should I watch out for when converting WebP to AVIF?
This is the one conversion on the site we would talk you out of for a whole library. Both formats are lossy, so you pay another compression generation, the byte saving is often close to zero, and AVIF takes several times longer to encode. Do it for specific images that band or smear as WebP, not as a bulk migration.
Any tips for getting the best AVIF out of a WebP file?
Converting from the original source rather than from an already-compressed WebP always gives a better result. Use this page when the WebP is all you have.
Will I lose quality converting WebP to AVIF?
AVIF is lossy, and unusually good at it, at the same visual quality it is typically 20-30% smaller than WebP and around half the size of JPG. Gradients and flat skies, where JPG bands most visibly, survive best.
Do my WebP files get uploaded?
No. The conversion runs on your device, in the browser tab you are reading this in. You can prove it: disconnect from the internet and convert anyway.
Is it free, and how many WebP files can I do at once?
Free, with no sign-up, no watermark and no daily limit. Up to 200 files per batch, downloadable individually or as one ZIP.
Related conversions
AVIF is not the only thing a WebP file can become, and WebP is not the only thing that converts to AVIF. These run on the same converter, on your device, with the same 200-file batch limit.
Guides
Longer walk-throughs covering WebP and the way this converter handles it.
Related tools
Once your images are converted, these on-device tools can help you prepare them for sharing or upload.