How to Convert WebP to AVIF
WebP was a big improvement over JPG and PNG, and for years it was the obvious choice for a fast website. AVIF is the next step: built on a newer, more capable codec, it typically shaves another thirty to fifty percent off a WebP file at the same visual quality. If you already moved your images to WebP for performance, converting them to AVIF is the logical follow-up — and this tool does it entirely in your browser.
Upload your WebP files
Drop one image or a whole batch. Everything is encoded locally on your device - nothing is sent to a server.
Set the quality
60% is visually excellent for almost every image. The savings over WebP show up per file as you convert.
Download your AVIFs
See exactly how much smaller each file became, then download individually or as a single ZIP.
Is Moving From WebP to AVIF Worth It?
For most sites, honestly, yes — but with a caveat worth understanding. AVIF and WebP are both modern, both support transparency, and both are miles ahead of JPG. The gap between them is real but smaller than the gap either has over the old formats. If your images are already WebP, you have captured most of the available benefit; AVIF is the final refinement rather than a transformation.
Where AVIF pulls decisively ahead is on large, detailed images and smooth gradients — skies, shadows, subtle colour transitions — which it handles with noticeably fewer artifacts than WebP at the same file size. On small icons and flat graphics the difference is marginal, since both formats already compress those to almost nothing.
The one thing to watch is support. WebP is supported slightly more widely than AVIF in older software, though every current browser handles both. The standard professional approach is to serve AVIF with a WebP fallback using the HTML picture element, so every visitor automatically gets the best format their browser can decode. To go the other way, our AVIF to PNG converter handles decoding.
Frequently Asked Questions
How much smaller is AVIF than WebP?
Typically thirty to fifty percent at the same visual quality, though it varies by image. Large photos with smooth gradients benefit most; small flat graphics benefit least, since WebP already compresses those very well.
Does converting WebP to AVIF lose quality?
Both are lossy, so there is a re-encoding step. At 60% quality the result is visually indistinguishable from the WebP source while being meaningfully smaller.
Is it worth moving from WebP to AVIF?
For image-heavy sites, usually yes - it is the final refinement in compression. If your images are already WebP you have captured most of the benefit, and AVIF adds the last increment.
Does AVIF preserve transparency from WebP?
Yes, fully. Both formats support a complete alpha channel, so transparent areas are carried over exactly.
Which browsers support AVIF?
Chrome, Edge, Firefox and Safari all decode AVIF in current versions. Encoding - what this tool does - needs Chrome 106+, Edge 121+ or Firefox 128+.
Should I serve AVIF or WebP on my website?
Serve AVIF with a WebP fallback using the HTML picture element. That way modern browsers get the smaller AVIF and everything else gets WebP automatically.
Is it safe to convert private images here?
Yes. Encoding happens entirely inside your browser - your images are never uploaded to any server, never stored, and never seen by anyone.
Can I convert multiple WebP files at once?
Yes. Drop as many as you like - each converts separately, and Download All as ZIP bundles the whole batch.
Why did one image barely get smaller?
Small or already-optimised WebP files have little redundancy left for AVIF to remove. The big wins are on large, detailed photographs.
Will AVIF improve my site speed over WebP?
Somewhat. The image payload drops, which helps Core Web Vitals - but the improvement is smaller than the jump from JPG to WebP was, since WebP is already efficient.
How do I convert AVIF back to WebP or PNG?
Use our AVIF to PNG converter for a lossless copy, or convert onward from there. PNG is the safe universal target for editing.
Is this WebP to AVIF converter really free?
Completely free, with no limits, no watermarks, no signup and no premium wall. Everything runs in your browser, so there are no server costs to pass on.
Last updated: July 11, 2026 · FlipMyFormat WebP to AVIF Converter
Written and maintained by the FlipMyFormat team