Convert AVIF to WebP
This is the conversion for when you want to keep files small but need broader compatibility than AVIF offers. WebP is somewhat larger than AVIF for the same quality, but it is understood by a great deal more software, and it keeps the transparency that JPG would destroy.
Files are decoded and re-encoded inside this browser tab. Nothing is uploaded — you can disconnect from the internet after this page loads and conversion still works.
A sensible middle ground for web publishing, and it runs entirely in your browser.
How to convert AVIF to WebP
- Drag your AVIF files onto the box above, or click it to browse.
- Each file converts in place — no upload, no queue.
- Download them one by one, or grab the whole batch as a ZIP.
The compatibility gap between two modern formats
Both formats are supported by every current browser, so for web delivery either works. The difference shows up everywhere else. WebP has been around since 2010 and has slowly worked its way into desktop editors, CMS platforms, and design tools. AVIF arrived in 2019 and much of that ecosystem has not caught up.
So if your images pass through a CMS, a plugin, a template, or somebody else's pipeline, WebP is far less likely to be rejected along the way.
What the conversion costs you
Expect the WebP to be perhaps 20 to 50 percent larger than the AVIF for equivalent visual quality. AVIF genuinely compresses better, particularly on images with smooth gradients.
Transparency survives, since WebP has a full alpha channel. HDR does not — WebP is limited to standard dynamic range, so your browser tone-maps HDR content down while decoding, and that cannot be undone.
Why not convert the other way?
You cannot, at least not in a browser. Browsers decode AVIF but have no ability to encode it through the canvas API, so no client-side tool can produce AVIF output. Generating AVIF needs a server or a dedicated desktop encoder. That is a genuine constraint of doing this without uploading your files, not an omission.
Frequently asked questions
Is WebP or AVIF smaller?
AVIF, usually by 20 to 50 percent at matching quality. You are trading some of that efficiency for much wider software support.
Does transparency survive?
Yes. WebP supports a full alpha channel, so transparent regions carry through unchanged.
Can I convert WebP to AVIF here?
No. Browsers can decode AVIF but cannot encode it, so producing AVIF requires server-side processing or a desktop tool.
What happens to HDR images?
They are tone-mapped down to standard dynamic range during decoding, because WebP cannot represent HDR. This is not reversible.
Are my files uploaded?
No. Everything runs in your browser.