Stayput

Convert AVIF to JPG

For the newest image format that most software still cannot open.

Nothing is uploaded Works offline Open source No limits, no watermark
Drop AVIF files hereor click to choose files. Batches welcome.
    Working…

    Done

    Your files are processed on this device and never sent to a server. Reload the page to clear everything from memory.

    AVIF is the image format built on the AV1 video codec. Websites use it because it is even smaller than WebP, but if you save an AVIF from a site you will find that many editors, viewers and upload forms do not know what to do with it. Converting to JPG makes it universally usable.

    Every current browser decodes AVIF natively, so this page usually needs no extra download; older browsers get a WebAssembly decoder instead. The image is decoded in your tab and re-encoded as JPG at the quality you set. Transparent AVIF areas are filled with the background colour you choose.

    How it works

    1. Drop your AVIF files onto the page, or tap to pick them. Batches are fine.
    2. Adjust the quality slider if you want a smaller file, or leave it at 90.
    3. Download each JPG, or all of them as one zip.

    In your browser, not on a server

    Your browser already knows how to decode JPG, PNG, WebP, AVIF and SVG. Stayput draws each image onto an off-screen canvas and asks the browser to encode it again in the format you picked. HEIC input goes through the libheif WebAssembly decoder, and JPEG XL (or AVIF, in a browser without native support) through the Squoosh decoders compiled to WebAssembly, fetched once as program files and cached. Nothing here needs a server because nothing here is beyond what a browser can do on its own.

    Compared with upload-based tools: Online converters upload your image, convert it on their machine and hand it back through an ad-covered download page. This does the same conversion with the same codecs, on your device, in less time than the upload.

    Verify it yourself. Load this page, turn off Wi-Fi or switch to airplane mode, and run the tool. Or open your browser's developer tools (F12, or Cmd-Option-I on a Mac), pick the Network tab, and watch it while you convert. The panel above does the same count for you.

    Questions

    What if my browser cannot decode AVIF?

    AVIF decoding arrived in Chrome 85, Firefox 93 and Safari 16. In an older browser the page fetches a WebAssembly AVIF decoder (about 1 MB of program code, cached after the first use) and decodes the image in the tab instead. Either way the image itself is never sent anywhere.

    Is quality lost?

    AVIF and JPG are both lossy, so a small amount of detail is discarded in the re-encode. At quality 90 it is not visible. There is no way to convert AVIF to JPG without this step.

    Is the image uploaded anywhere?

    No. The conversion runs entirely inside your browser tab. The page works with the network disconnected.

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