WebP to AVIF Converter
Runs in your browser — your files are never uploaded.
Convert WebP to AVIF, the newer format that usually edges it out on file size at matched quality. Transparency survives the trip. This is a closer contest than PNG or JPEG to AVIF, so the result reports the real before-and-after size — on some images, particularly small or flat ones, your existing WebP will simply be the better file, and it is worth knowing that before you replace it.
OptionsQuality: 60% · Encoder effort: Balanced · Max width: Original size · Lossless: off
How to convert WebP to AVIF
- 1
Drop your WebP onto the box, or click to choose a file.
- 2
Leave quality at 60, which on AVIF is already high.
- 3
Compare the reported sizes — keep the WebP if it came out smaller.
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Frequently asked questions
Is AVIF actually better than WebP?+
Usually smaller at the same visual quality, especially on photographs and at lower quality settings, where AVIF degrades far more gracefully. It is slower to encode and the margin narrows on small images. For a graphic under a few kilobytes the container overhead can make AVIF the larger file, which is why this tool reports the comparison instead of assuming a win.
Does transparency survive?+
Yes. Both formats support a full alpha channel, so transparent areas convert cleanly with no background flattening.
What about animated WebP?+
Only the first frame is converted. Animated AVIF exists, but encoding it in a browser is a different and much heavier job than a still image. For animation, keep the WebP or use the GIF and video tools instead.
Am I losing quality by converting?+
A little — both are lossy formats, so re-encoding compounds whatever loss the WebP already carries. At quality 60 it is not visible in practice, but converting back and forth repeatedly will degrade an image. Work from the highest-quality original you have.
Why the one-time download?+
No browser can encode AVIF, so the encoder ships as about 3.5 MB of WebAssembly, fetched once per session and reused after that. It is what makes converting on your own device possible at all.