Convert WebP to AVIF — free, in your browser
Drop your file below. The conversion runs entirely inside your browser — the file never leaves your device, there is no account, no watermark and no size-signup trap.
Supports image/*,.webp,.gif,.bmp,.avif,.svg,.tif,.tiff
This page converts WEBP files to AVIF right in your browser — the file is never uploaded. WEBP is lossy or lossless (transparency support); AVIF is lossy or lossless (transparency support). Everything below runs on the same encoder your browser ships with, so the result you download is exactly what this page measured.
Converting never adds quality: if the source is a lossy format, that loss is already baked into the pixels and no converter can recover it. What a conversion can do is stop further loss (choosing a lossless target) or shrink the file further (choosing a more efficient codec). The measured table below shows real sizes and timings for a representative sample so you can decide before spending time.
Measured numbers
We publish first-party measurements only where our automated benchmark environment can guarantee the encoder is real (headless Chromium silently falls AVIF encoding back to PNG, so we refuse to print invented numbers here). The tool above performs the conversion with your own browser's encoder — its result card shows the true size for your file, which beats any sample statistic anyway.
When WebP → AVIF is the right call
- •A mature web pipeline graduating from WebP to AV1: same-quality files typically shrink another 15–25%.
- •Long-tail assets (documentation images, archive galleries) where every KB matters over years.
FAQ
Is it worth re-encoding WebP to AVIF?
For large libraries served at scale, a 15–25% cut is real bandwidth. The caveat: your WebP was already lossy, so this is a second lossy generation — keep original masters.
Does quality suffer from double compression?
At quality 80 the second generation is designed to be visually transparent for most content. Judge with the preview and per-file size readout before downloading.
What about animated WebP?
Only the first frame converts — this tool is for still images by design.