Convert AVIF to WebP
Converting AVIF to WebP works like every pair on this site: drop the .avif in the box, click Convert to WebP, download the result. The work is done by WebAssembly codecs in your browser, never by a remote server.
Drop your AVIF here
It becomes a WebP right in your browser, up to 100 MB
Your file never leaves your device
Why convert AVIF to WebP?
WebP is the compatibility compromise between AVIF and the legacy formats: smaller than JPG or PNG, but with several extra years of software support compared to AVIF. This pair fits when a CMS, app or toolchain accepts WebP but chokes on AVIF, which is currently a common middle state, and when you want to keep transparency that rules out JPG without paying PNG sizes. It is a sideways move between modern formats rather than a retreat to the lowest common denominator.
What is AVIF?
AVIF (AV1 Image File Format) is the newest mainstream image format, published by the Alliance for Open Media in 2019 on top of the royalty-free AV1 codec. It delivers the strongest compression of any widely deployed format, especially at low and medium quality, and adds an alpha channel, HDR and 10/12-bit color. Browser support landed in Chrome 85, Firefox 93 and Safari 16, but much desktop software still cannot open an .avif file.
What is WebP?
WebP is an image format Google released in 2010, built on VP8 video coding. It offers both lossy and lossless modes, supports transparency in both, can hold animation, and typically lands 25-35% smaller than a comparable JPG. Every modern browser has rendered it since Safari 14 arrived in 2020, but plenty of desktop software, older CMS upload forms and printing services still refuse it.
Quality and what to expect
Expect modest growth in file size, since WebP cannot match AV1 compression; the output is still far smaller than a PNG equivalent. The transcode is lossy-to-lossy in the typical case, layering slight WebP loss over the AVIF's own, so go back to originals when you have them and care deeply about fidelity. Alpha channels are preserved in both directions of this pair. HDR and high-bit-depth AVIF content gets flattened to 8-bit standard dynamic range in the WebP.
AVIF to WebP FAQ
Why convert between two modern formats at all?
Support maturity. WebP went mainstream around five years before AVIF, so a large band of software accepts WebP but not AVIF yet. This pair targets exactly that band without sacrificing transparency or bloating to PNG sizes.
How do the file sizes compare?
The WebP usually comes out somewhat larger than the AVIF, often 20-60% bigger at similar quality, because AV1 simply compresses harder. It remains much leaner than the legacy formats.
Is quality lost in this conversion?
A little, in the usual lossy-to-lossy way: the WebP encoder re-compresses pixels the AVIF already approximated. At default settings the effect is hard to see. Lossless mastering workflows should run from original sources instead.
What happens with animated AVIF files?
This pair handles single images. An animated AVIF will not convert as a sequence; at most you receive the first frame as a still WebP, and some animated files may fail to decode entirely.