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WebP to AVIF Converter
Convert WebP images to AVIF for even smaller files on the modern web. Transparency is kept, and conversion happens in your browser.
Your images never leave your device
How to use WebP to AVIF
- Drop your WebP files on the page or pick them from your device.
- Wait while each file is converted to AVIF. AVIF encoding is slow, and large photos can take several seconds.
- Download the AVIF files one by one, or all together as a zip.
Frequently asked questions
Is AVIF really smaller than WebP?
For photographs, usually yes, often by a meaningful margin at similar visual quality. For small flat graphics and icons the gap is narrower, and AVIF can occasionally be larger.
Should I convert from the original instead of the WebP?
If you have it, yes. Starting from the original JPG or PNG avoids compressing the image twice, so you get cleaner results at the same size.
Will AVIF work in every browser?
Current versions of Chrome, Edge, Firefox and Safari display it. Older browsers and many non-browser programs do not, so serve a fallback if you need broad reach.
Are my WebP files uploaded anywhere?
No. The conversion runs in your browser using WebAssembly, so your WebP files stay on your device. There is no signup, no watermark and no cost, and you can convert a whole batch and download it as a zip.
About WebP to AVIF
WebP to AVIF is a web performance move. AVIF is the newer of the two formats and, on photographs, tends to reach the same visual quality at a noticeably smaller file size. If you maintain a website and have already moved to WebP, AVIF is the next step down. Like WebP it supports transparency, so logos and cut-outs survive the change.
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Both formats are lossy for photos, which means a WebP re-encoded as AVIF is compressed twice and can pick up artifacts. If you still have the original JPG or PNG, converting from that gives better results. AVIF encoding is slow, and large images can take several seconds each. Animated WebP files are reduced to their first frame, since the output is a still AVIF. Browsers have supported AVIF for a few years, but editors, email clients and upload forms often do not, so keep a WebP or JPG fallback for those uses.
WebP is either lossy or lossless, depending on how the file was saved; AVIF is lossy or lossless, compressed with AV1. Both formats can store transparency, so transparent areas in the WebP file stay transparent. WebP files can be animated, but the result is a still image made from the first frame. For scale, a 12-megapixel photo is typically 1.5 to 3.5 MB as WebP and 1 to 2.5 MB as AVIF. Compatibility: Recent versions of Chrome, Edge, Firefox and Safari display it. Support in editors, email clients and upload forms is still patchy.