Broader compatibility
WebP is supported across more browsers, editors and platforms than AVIF, so converting removes the risk of an image that simply will not open for some visitors.
ImageRuns in your browser
AVIF to WebP Converter
Swap a cutting-edge AVIF for a WebP that older browsers and tools still open happily — no upload.
- Upload
- Batch upload supported · 25 MB max
- Privacy
- Nothing is uploaded
- Cost
- Free · no sign-up · no watermark
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Processed entirely on your device
Your file is read, transformed and re-encoded inside this browser tab using JavaScript. There is no upload endpoint — nothing leaves your machine, nothing is stored, and the result is created as a local object URL that disappears when you close the page.
Overview
About the AVIF to WebP Converter
Convert AVIF to WebP free online — re-encode a modern AV1 image into a widely supported WebP with a quality slider and transparency. Batch, in-browser, no upload.
When AVIF is too new for the audience
AVIF is the most efficient mainstream image format, but efficiency only helps if the browser on the other end can decode it. Some older browsers, editors and platforms still cannot. WebP has been supported far longer and more widely, so converting AVIF to WebP keeps a modern, small file while removing the compatibility risk.
Quality and transparency
The quality slider decides how hard WebP compresses; 90% and above stays very close to the decoded AVIF while producing a small file. Any alpha channel in the source is preserved, so transparent artwork stays cleanly cut out. Because both formats are modern codecs, the size penalty for the extra compatibility is usually small.
Batch conversion, privately
Up to twenty files convert in one run, each up to 25 MB, processed one at a time so memory stays predictable, with a summary of size before and after. Each result is named after its source with a .webp extension. Nothing is uploaded: the decode, the re-encode and every download happen inside the tab, with no account and no watermark, because there is no server on the other end.
Step by step
How to use the AVIF to WebP Converter
Drop one or more images onto the upload area — an .avif or any other format, detected automatically.
Set the quality slider; 85-95% keeps the WebP close to the decoded AVIF.
Leave transparency on — WebP keeps the alpha channel the AVIF carried.
Press Convert to WebP — each file is decoded and re-encoded locally, one at a time.
Read the size change in the result row, then download each WebP or the whole batch.
Why use it
Benefits and common use cases
What this tool is good for, and what it deliberately does not try to do.
Still efficiently compressed
WebP is a modern codec in its own right, so you keep most of AVIF's size advantage while gaining reach — far smaller than a comparable PNG or JPG.
Keeps transparency
The alpha channel survives the conversion, so logos and cut-out artwork stay transparent instead of being flattened onto a background.
Private by construction
Decoding and re-encoding run in the browser's own image pipeline, so nothing is uploaded and no copy is stored on a server.
Questions
Frequently asked questions
Short, honest answers about quality, limits and privacy.
Why convert AVIF to WebP?
AVIF compresses slightly better but is newer and not decoded everywhere. WebP has near-universal browser support and broad tool support, so it is the safer choice for publishing to an unknown audience.
Will the WebP be much larger than the AVIF?
Usually only modestly. Both are modern codecs; at a comparable quality the WebP is a little bigger but still far smaller than PNG or JPG, and the compatibility gain is worth it.
Does this keep transparency?
Yes. Any alpha channel in the AVIF is preserved in the WebP, so transparent regions stay transparent rather than being filled with a solid colour.
Are my files uploaded to a server?
Never. There is no upload endpoint — the decode, the re-encode and every download happen inside your tab using local object URLs released shortly after.