AVIF to JPG

You often get AVIF files without choosing them: images saved from websites that serve AVIF to save bandwidth, pictures downloaded from social networks and shops, screenshots from some Android phones, and photos exported by newer camera and editing apps. When such a file is rejected by an upload form, a messaging app, an older version of Windows or Office, or a print shop, converting it to JPG is the quickest fix. The JPG keeps the same width and height as the AVIF and opens everywhere.

AVIF (AV1 Image File Format) compresses images about half as large as JPG at similar quality and supports transparency and high dynamic range. Current Chrome, Edge, Firefox and Safari can display it. JPG remains the universal format, though, so converting is the easiest way to use AVIF pictures in places that don't support them yet.

Because AVIF is so efficient, the JPG version is usually larger than the AVIF it came from — that's expected, not a mistake. A quality of 90 keeps the picture visually identical for most photos; lower values make smaller files with slightly softer detail. Converting can't restore detail the AVIF compression removed, so the JPG will look exactly like the AVIF did, not better. PNG is lossless and keeps every pixel, but it is much larger for photos.

Some AVIF images, such as logos and product cut-outs, have transparent areas. JPG can't store transparency, so those areas are filled with the background colour you choose — white by default, which suits most documents and marketplaces. If you need the transparency, choose PNG instead; it keeps the transparent areas exactly.

Each file is checked by its content: an image that only has an .avif name but is really a JPG or PNG is refused with a message, and you can convert it with the Image Converter instead. Very large images that would exhaust the browser's memory are refused before decoding. Nothing is uploaded or stored, there is no watermark and no limit on how many images you convert.