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AVIF is the most efficient mainstream image format — typically 30–50% smaller than JPEG and smaller than WebP at the same quality, with transparency and HDR support. Drop your JPG, PNG or WebP files below to convert them to AVIF, entirely in your browser. No upload, no account.
PNG, JPG, GIF, WebP, HEIC up to 50MB per file
Choose filesAVIF is built on AV1, the video codec developed by the Alliance for Open Media, and it compresses harder than anything else in mainstream use. Compared with JPEG at matching visual quality it typically produces files around 50% smaller; compared with WebP the gain is usually 20–30%. On a large hero image that can mean going from 400KB to under 150KB.
It also brings capabilities JPEG never had: a full alpha channel for transparency, HDR and wide colour gamut support, and 10- and 12-bit colour depth that avoids the faint banding JPEG can show in smooth skies and gradients.
Encoding is slow. Compressing an AVIF takes meaningfully longer than a JPEG or WebP because the codec explores far more possibilities to find the smallest representation. In the browser this is noticeable on large images and on batches — the wait is the price of the file size.
Browser support is now broad: Chrome, Firefox, Edge, Safari and current mobile browsers all decode AVIF. Support outside the browser is thinner, so desktop image editors, print workflows and older upload forms may still reject it. The usual approach on a website is to serve AVIF with a WebP or JPEG fallback rather than converting your only copy.
For most photos AVIF is 30–50% smaller than JPEG at the same visual quality, and usually 10–20% smaller than WebP. The savings are biggest on detailed photographs; simple graphics see less difference.
AVIF is decoded (viewed) by all modern browsers. Encoding in the browser currently works in Chrome and Edge. On Safari and Firefox this tool can't produce AVIF yet, so use a Chromium browser to convert — or pick WebP, which encodes everywhere.
Yes. Unlike JPEG, AVIF keeps an alpha channel, so transparent PNGs convert to AVIF without a white background — while being far smaller than the original PNG.
AVIF gives the smallest files and is supported by all current browsers, so it's the best choice for new sites that can serve a WebP or JPEG fallback for older clients. If you need a single format that encodes everywhere, WebP is the safer pick.