Smaller again, but stills only
WebP, released by Google in 2010, already beats JPEG and PNG on size. AVIF, built on AV1, a newer video codec (compression method), usually goes smaller still at the same look. For a page full of product photos that is worth doing. For one small icon it isn't worth the bother.
The catch is animation. If your WebP moves, this converter keeps only the first frame, and the AVIF you download is a single still picture. Keep animated files as WebP.
AVIF supports transparency as a format. If your WebP has a transparent background, open the output and check the edges before you place it on a coloured page.
How to convert WebP to AVIF
- Upload up to 5 .webp files of 300 MB or less. For an animated WebP, remember that only the first frame comes through.
- AVIF is the target. Press Convert.
- Download the .avif and compare its size with the WebP before you swap them on the page.
Files are uploaded and converted on our servers. There is no quality setting to choose; you get one AVIF per WebP.
When WebP is still the better choice
Every browser that shows AVIF also shows WebP, but not the other way round. Edge only added AVIF in version 121 (January 2024), and Safari with iOS 16 on iPhone and Safari 16.4 on Mac, while both showed WebP well before that. If many of your visitors sit on older browsers, keep serving WebP. The reverse direction is AVIF to WebP, and if an editor opens neither, WebP to PNG is the safe route. Other targets are on the WebP converter page.