Convert WebP to AVIF without uploading
Drop your WebP files below. You get AVIF back in seconds. No upload, no queue, no limits, no watermark.
Drop images here or click to browse
HEIC · JPG · PNG · WebP · GIF · BMP. Nothing is uploaded.
Output:AVIF · need another format?
Why convert WebP to AVIF?
WebP is common on the web, but many desktop apps, printers and older tools still cannot open it. AVIF is the most efficient mainstream format today. It is roughly half the size of JPG at the same quality and works in 94% of browsers.
When you actually need this
Both are modern web formats, but AVIF generally compresses better. Converting is worth it when you are optimising a site and want the smallest file the browser can still display.
What it costs you
This is a lossy-to-lossy conversion, so quality can only drop. On a small, already-efficient WebP the gain may not be worth it: our 30 KB test file came out at 32 KB, slightly larger, while taking about 1.3 seconds to encode.
What happens to the file size
On this site's own 550×368 test image, 30 KB of WebP became 32 KB of AVIF. Slightly larger, which is the cost of the format change rather than a fault. Drop the quality slider a little if size matters more than fidelity. Encoding took roughly 1.3 seconds per image on our test machine.
How it works
Drop your WebP files above and pick a quality. Each one is decoded to raw pixels in a background thread, re-encoded as AVIF, and handed straight back to you — individually or as a ZIP. Nothing queues, because nothing leaves.
Frequently asked questions
Is AVIF always smaller than WebP?
No. On large photographs AVIF usually wins clearly. On small or already heavily compressed WebP files the difference can vanish or reverse, as it did in our own measurement. Convert one file first and compare before running a whole batch.
Is it really private? Where do my WebP files go?
Nowhere. The WebP is decoded and re-encoded as AVIF by your own browser, using WebAssembly — the same technology behind Photopea and Google's Squoosh. Load this page, switch off your internet, and the conversion still works. There is no upload step to opt out of, because there is no server to upload to.
Is there a file size or daily limit?
No. Your device does the work, so there is no bill for us to protect. The practical ceiling is your own memory: a batch of WebP files converts fine, but very large images on an older phone can run out of room, and the tool will say so rather than fail silently.
Is QuietPix free?
Yes. Free for personal and commercial use, supported by small ads placed outside the tool itself. No account, no trial, no watermark on anything you convert.