Convert AVIF to WebP — locally, without uploading
Developers usually reach for this conversion when AVIF proves a step too new: WebP support reaches back years further across browsers, apps, email clients, and image pipelines, making it the pragmatic middle ground between cutting-edge AVIF and bulky JPG or PNG. Both formats support alpha transparency, so nothing is flattened, and both compress well — expect the WebP to be somewhat larger than the AVIF, since AV1-based compression is simply stronger. The conversion is performed by WebAssembly codecs inside your browser: files are decoded and re-encoded on your machine, nothing is uploaded, and batches process as fast as your CPU allows.
How it works
- Drop .avif files below — batch conversion is supported.
- Adjust the WebP quality slider if the default doesn’t suit.
- Download each .webp file as it completes.
Frequently asked questions
Why convert AVIF to WebP instead of keeping AVIF?
Compatibility. WebP has been supported in every major browser since 2020 and in far more apps and pipelines, while AVIF support (Safari 16+, various desktop tools) is still catching up. WebP is the safer format when you don’t control where the image will be opened.
Will the WebP file be bigger than the AVIF?
Usually somewhat, yes — AVIF’s AV1-based compression outperforms WebP at similar quality. The WebP should still be far smaller than an equivalent JPG or PNG, so it remains an efficient choice.
Is transparency carried over?
Yes. Both AVIF and WebP support full alpha transparency, and it survives the conversion unchanged.
Where do my files go during conversion?
Nowhere. They are read into your browser’s memory, converted by WebAssembly codecs on your device, and offered back as downloads. No network requests carry your image data — the page even works offline once loaded.