Convert AVIF to WebP

Switch your AVIF images to WebP for better compatibility while keeping files small.

Drop your AVIF files here

Or choose them, or paste an image (Ctrl + V or ⌘ + V).

Up to 20 files of 50 MB each (10 files of 30 MB on mobile).

The lower the quality, the smaller the file.

Longest side, proportions kept. Never enlarged.

Metadata (GPS location, camera, date) is always removed from the converted file.

    100% local processing, nothing is uploaded

    How does it work?

    AVIF (AV1 Image File Format)

    AVIF is based on AV1, a royalty-free video codec. It is currently the most efficient image format on the web: often half the size of a JPG at equal visual quality, with transparency and a wide color gamut. Chrome, Firefox, Edge and Safari (since iOS 16 and macOS Ventura) display it; many programs outside the browser cannot read it yet. It is slower to encode than other formats.

    WebP

    WebP, created by Google, was designed for the web. It offers lossy or lossless compression, transparency and animation, with files 25 to 35% smaller than a JPG of comparable quality. Every current browser reads it, but some older software (viewers, office programs, printing services) cannot open it yet.

    AVIF or WebP: which format should you choose?

    AVIF offers the best quality-to-size ratio, but is less widely supported outside browsers.

    WebP is a safe compromise: almost as small, with transparency, and accepted by more software, CMSs and social networks. Choose it when a tool rejects AVIF but you want to keep files small.

    How does the conversion work?

    1. Drop your AVIF files in the area provided, choose them or paste an image: several files at once if you like.
    2. Adjust the options if needed: they apply to every file in the list, which are converted again automatically.
    3. Download each WebP file, or all of them at once in a ZIP archive.

    The conversion takes place in your browser. For your information:

    • The real format of each file is checked from its content, not its extension.
    • If your browser cannot create WebP itself (Safari, for example), a free WebAssembly encoder takes over automatically.

    Examples

    Importing images into a tool that rejects AVIF

    Your newsletter tool rejects the 4 AVIF images (120 KB each) delivered by your agency. Converted to WebP at quality 80, they weigh about 160 KB and are accepted.

    Standardizing a website’s formats

    Your media library mixes AVIF and WebP. The 18 AVIF images are converted to WebP in one go, with a maximum size of 1,920 px: a single format to manage, with an average size of about 220 KB.

    Frequently asked questions

    Will the WebP be larger than the AVIF?

    Usually slightly, by 20 to 40% depending on the image. WebP is still two to three times smaller than PNG and noticeably smaller than JPG.

    Is transparency kept?

    Yes, WebP supports transparency just like AVIF.

    Why convert AVIF to WebP rather than to JPG?

    To keep small files and transparency while gaining compatibility with web tools. For full compatibility (printing, office software), JPG remains the best choice.

    What quality should I choose?

    80, the default value, suits most images. An already heavily compressed AVIF does not need a WebP quality above 85: lost details will not come back.

    Are my AVIF files uploaded to a server?

    No. The conversion runs entirely in your browser, on your device: your files are never uploaded, stored or viewed by anyone. You can check this in the “Network” tab of your browser’s developer tools: no file appears there. Metadata (GPS location, camera, date) is also removed from the converted file.

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