Turn WebP downloads into AVIF: the smallest modern web format
Processed in your browser. Nothing is uploaded. Updated on 24 Oct 2026.AVIF is what people squeezing the last kilobytes out of a page end up needing. Drop in a WebP saved from a web page; what comes back is about half the bytes of a JPEG that looks the same. The program you need to open it in was written before WebP existed, which is why this page exists. AVIF is lossy, so a little detail is thrown away. Your files stay where they are; the work is done by the browser you are reading this in.
Choose the WebP images you want smaller still; AVIF is already set under Convert to.
AVIF can be written in Chrome and Edge; elsewhere the button is greyed out with a note saying why.
Set Quality, and keep it high when the WebP was already compressed hard, as AVIF is lossy too.
Press Convert to AVIF, then Download; any transparency carries over.
Convert Image reads ten formats and writes seven. It opens JPEG, PNG, GIF, WebP, AVIF, BMP, TIFF, ICO, SVG and HEIC, and saves as JPEG, PNG, WebP, AVIF, BMP, TIFF or ICO. Drop up to twenty files in and each row shows the new size beside the old one as it finishes.
What a conversion costs is stated before it runs, not after the download. JPEG has no transparency, so transparent areas are filled with a colour you pick, white by default. BMP is the same. A multi-page TIFF gives you one file per page by default; an animated GIF or WebP keeps its first frame by default, with every frame available on browsers that can read them. An ICO is written as a genuine icon file holding 16, 32, 48, 64, 128 and 256 pixel versions, each stored as a PNG.
Everything runs on your device. TIFF uses a reader loaded only when a TIFF arrives; HEIC uses a decoder loaded only when a HEIC arrives; an SVG is stripped of anything that could run or fetch and then drawn in an isolated image, at a size you choose. Writing WebP and AVIF depends on the browser, and the tool disables a format it cannot write rather than quietly saving something else. Limits are 20 files per batch and 50 MB per file.
The rest of the article, and all 8 questions about Convert Image, are on the Convert Image page.
Reading works for JPEG, PNG, GIF, WebP, AVIF, BMP, TIFF, ICO, SVG and HEIC; writing works for JPEG, PNG, WebP, AVIF, BMP, TIFF and ICO. That is every pair those two lists allow, about sixty of them, and each pair has its own page with the target format already chosen for you.
Frames are counted the moment the file is dropped, and the first one is kept by default, because a still is what people usually want. Chrome and Edge can read every frame, and there the choice 'All 12 frames' gives you one file per frame. Other browsers can only read the first, and the page says so rather than pretending.
Writing AVIF and WebP is done by the browser, and not every browser can. Chrome and Edge write both; Firefox and Safari often cannot write AVIF. A format this browser cannot write is disabled with a note naming the browsers that can, so nothing is silently saved in the wrong format.
Not here, and the page says so up front. Tracing pixels into shapes is a different job, done by Image to SVG on this site, and PSD files are now opened by PSD to PNG, which saves the picture and each layer. Camera RAW differs by manufacturer and needs a decoder too large for a browser; export a JPEG or TIFF first.
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On the related tools: JPG to PPT – Build a slideshow from JPG photographs in a few seconds · Combine Photos – Put two or more pictures side by side in one image.
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