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WebP to AVIF converter

Convert WebP to AVIF in your browser: your files are never uploaded, there is no limit on how many you convert, and transparency is kept and you set the quality yourself. Drop in one WebP or a whole batch and download the AVIF files straight away.

Drag your WebP files here

Choose files

Several files allowed ยท or paste with Ctrl+V

    WebP to AVIF

    60

    Lower makes the file smaller, higher keeps more detail.

    Everything happens in your browser. Your files are not uploaded.

    How it works

    1. Choose your WebP files

      Drop them into the box, choose them on your device or paste with Ctrl+V.

    2. Converted automatically

      Each file is converted to AVIF straight away in your browser.

    3. Download

      File by file, or everything at once as a ZIP file.

    One step further than WebP

    AVIF compresses better than WebP, typically giving a smaller file at a similar look, especially for photos with smooth areas and for large images. If you are already serving WebP and want to squeeze out more, this is the next format to try. Both formats support transparency, so cut-outs stay cut out.

    Generation loss: prefer the original

    Both WebP and AVIF are lossy. Converting a lossy WebP into a lossy AVIF compresses an already compressed picture, which adds a second round of small errors. At moderate settings you will not see it, but if you still have the original PNG, TIFF or camera JPG, convert that with PNG to AVIF or JPG to AVIF for the best result.

    Settings

    The quality slider starts at 60, which is a good value for AVIF. Because the source is already compressed, going much lower tends to show blocks, while going above 70 gives a larger file with little visible gain. Check the size summary under each file: if the AVIF is not clearly smaller than your WebP, keep the WebP.

    Practical notes

    • The encoder is about 3.4 MB and loads from this site the first time you use AVIF.
    • Speed. AVIF takes longer to produce than WebP, so big images need a few seconds. Shrink image first if you only need web size.
    • Support. AVIF works in all current major browsers, but some programs and email clients do not read it yet.

    Frequently asked questions

    Is AVIF really smaller than WebP?

    Usually, at a similar look, but not always. The size summary under each file shows your exact result, so you can keep whichever is smaller.

    Will I lose more quality?

    A little: both formats are lossy, so converting adds a second round of compression. Use the original image if you still have it.

    Is the transparency kept?

    Yes. Both formats support transparent and semi-transparent areas.

    Is my WebP uploaded?

    No. The AVIF is made in your browser, so the WebP never leaves your device. Images saved from the web stay as private as any other file on your device. The AVIF encoder (about 3.4 MB) is loaded from this site the first time you use it; your image is not sent along.