Convert WebP to AVIF
Drop your WebP files and download AVIF copies that are typically 20–40% smaller at the same visual quality. The browser decodes each WebP natively and re-encodes it as AVIF through a Canvas, so nothing is uploaded.
How to convert WebP to AVIF
- Drop your WebP files into the box below.
- The browser decodes each WebP natively and a Canvas exports an AVIF copy.
- Download the AVIF copies and serve them with a WebP fallback in production.
Why convert WebP to AVIF?
WebP was the efficient web image format of the last decade; AVIF is the efficient format of this one. If you already serve WebP and want to squeeze out the last drops of bandwidth, AVIF shrinks the same picture another 20–40% with no perceptible quality loss, which improves Core Web Vitals and lowers CDN bills on image-heavy pages. The catch is reach: AVIF only became safe to rely on in 2023 (Chrome 85+, Edge 121+, Firefox 113+, Safari 16.4+, Opera 71+), so a small slice of older browsers still cannot decode it. The professional approach is to serve AVIF with a WebP or JPG fallback via the picture element, giving modern visitors the smallest file and everyone else a working image. This converter is for one-off batches; for continuous publishing, generate AVIF in your build pipeline. Keep the WebP originals, since AVIF is a one-way lossy conversion.
How we compare
The closest peer to this tool is Google's Squoosh, which also runs fully in your browser. Squoosh focuses on compression for the modern web and does not handle HEIC or batch conversion. Cloudconvert and Convertio cover more formats but upload your files to their servers and meter usage.
| This site | Squoosh | Cloudconvert | Convertio | |
|---|---|---|---|---|
| Files stay on your device | ||||
| No signup | Limited | Limited | ||
| No ads | ||||
| Batch conversion | ||||
| Supports HEIC | ||||
| Works offline |
Frequently asked questions
Are files uploaded?+
No. Both the WebP decode and the AVIF encode happen inside your browser tab.
How much smaller will the AVIF be?+
Typically 20–40% smaller than the source WebP at the default quality. Smooth gradients and skies save the most; busy textures save less.
Why is AVIF encoding slow?+
AVIF is essentially a video codec encoding a single frame, so it is computationally heavy. Expect roughly 1–4 seconds per image on a modern laptop.
Does AVIF work in every browser?+
Chrome 85+, Edge 121+, Firefox 113+, Safari 16.4+ and Opera 71+ decode AVIF. Use a WebP or JPG fallback in production for older clients.
Does it preserve transparency?+
Yes. AVIF supports an alpha channel, and transparency from the WebP carries through.
Should I keep the WebP originals?+
Yes. AVIF is a one-way lossy step; keep the WebP (or the original master) for future re-exports.
Related converters
Files processed in your browser. We never see them.