What is AVIF to WebP conversion?
This tool converts AVIF images into the WebP format, entirely in your browser with no upload. AVIF is a modern, highly efficient image format based on the AV1 codec. It offers excellent compression with transparency and HDR support, but is only opened by newer browsers and apps. WebP is a modern web format from Google that supports both transparency and higher compression, typically 25–35% smaller than JPG or PNG. It is great for speeding up websites, though a few older programs may not support it.
How to use it
- Select or drop in your AVIF image.
- The tool converts it to WebP locally, instantly.
- Click Download to save the WebP file.
When should you convert AVIF to WebP?
AVIF compresses extremely well, but support is still limited outside the newest browsers, so you may need a more compatible format.
Convert AVIF to WebP when you want faster-loading web pages: WebP is typically 25–35% smaller than AVIF while keeping both quality and transparency. It is perfect for website images; if your audience uses older software without WebP support, use JPG or PNG instead.
AVIF vs WebP: key differences
| Property | AVIF | WebP |
|---|---|---|
| Compression | Lossy | Lossy |
| Transparency | Yes | Yes |
| Best for | Modern web images needing maximum compression | Fast-loading website images |
When does AVIF to WebP actually help?
You've got an AVIF file with great compression, but your CMS, your theme, or a slightly older platform just refuses to show it—AVIF support still isn't everywhere. Converting to WebP is the easy middle ground: nearly every browser from the last few years handles it, the file stays much smaller than JPG or PNG, and transparency comes along untouched.
- Expect the WebP to be substantially larger than the original AVIF, not a little: on our own test files the increase ran from 92% to 378%. That is the normal price for wider reach, and WebP is still the cheapest of the three exits.
- If the target is genuinely ancient and can't even read WebP, don't fight it: fall back to JPG for solid images, or PNG when you need transparency.
Ignore the average, read the worst row — this is the only exit that holds on all three
There are three ways out of AVIF and we ran the same three pictures through all of them. This page gives +92% for the photo, +378% for the UI screenshot and +208% for the illustration — even the worst row stays inside +400%. The worst rows on the other two routes are +2942% for AVIF to JPG and +2704% for AVIF to PNG. That difference is practical: if you are processing a whole folder of mixed material you cannot afford the worst case, and WebP is the only option that never runs away on one category of image. The photo row, 122.3 KB → 234.4 KB, is effectively tied with JPG’s +89%, but WebP also brings a real alpha channel and is recognised by every current browser just the same. The one case WebP loses is a system that accepts JPEG only — a compatibility question, not a size one.