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CodexValley

Image Format Converter

Available

Convert images between JPEG, PNG and WebP in a batch, with a background colour for transparency, and download a ZIP.

Convert your images

Your images stay on your device. Nothing is uploaded, and re-saving removes camera details such as GPS location.

    Applies to JPEG and WebP. PNG keeps every pixel, so it only gets smaller by making the image smaller.

    Wider images are made smaller, keeping their shape. Smaller ones are never enlarged.

    JPEG cannot be transparent, so see-through parts get this colour.

    About this converter

    Change images between JPEG, PNG and WebP, one at a time or in a batch, and download them one by one or as a ZIP. Choose the quality, a background colour for transparent areas and an optional largest width. Nothing is uploaded: the conversion happens in your browser.

    How it works

    • Each image is drawn on a canvas in your browser and saved in the format you choose. Phone photos are turned the right way up first.
    • JPEG has no transparency, so transparent parts of a PNG or WebP are filled with the background colour you pick. PNG and WebP keep transparency.
    • GIF, BMP and AVIF files that your browser can open can also be converted. Animated GIFs keep only their first frame.
    • Limits: up to 30 images, 40 MB each and 100 megapixels.

    Common questions

    Which format should I choose?

    JPEG for photos that must open everywhere, PNG for screenshots, logos and anything that needs sharp edges or transparency, and WebP for small files on websites.

    Are my images uploaded?

    No. Everything happens in your browser and nothing is sent to our server.

    Why did I get a different format than I chose?

    Some older browsers cannot create WebP. When that happens the tool tells you which format was used instead.