AVIF to JPG

AVIF is a modern image format based on the AV1 video codec. Shops, news sites and image CDNs love it because a product photo that weighs 200 KB as JPEG often needs well under 100 KB as AVIF. The catch shows up when you save such an image: Windows Photos may open it, but older versions of Office, many print kiosks, some government upload forms and plenty of photo editors still refuse the file. Converting to JPG solves that in one step.

Why you end up with AVIF files

When a browser asks a server for an image, it says which formats it understands. If the browser accepts AVIF, many sites send AVIF even when the address ends in .jpg. Right-click and save, and you get an AVIF file, sometimes with a misleading extension. The converter reads the file’s first bytes to recognise the real format, so a mislabeled download is still handled, and the list tells you when the content was not what the name claimed.

Converting step by step

Drop one file or a whole folder’s worth. Choose JPG (PNG and WebP are offered too), set the quality and press the convert button. Each row then shows the new size and dimensions with its own save button; with several files, one button bundles everything into a .zip. If the pictures are larger than you need, switch on the size limit and type the longest side in pixels: shrinking during the conversion saves far more space than lowering the quality.

Quality and file size

JPEG quality is a trade-off between detail and bytes. Around 90 percent keeps fine textures such as hair and fabric intact; 80 percent is plenty for most web use; below 70 percent you start to see blocky areas in skies and smooth gradients. Because the AVIF already went through lossy compression once, there is no benefit in pushing JPG quality to 100 percent: the result just becomes larger while carrying the same detail.

Transparency and backgrounds

AVIF supports an alpha channel, so logos and stickers saved from the web are often transparent. JPEG does not. Every transparent pixel is therefore painted with the background color shown in the options. White suits documents and most websites; for a dark slide, pick the slide’s color so no light box appears around the picture. When you need to keep the see-through areas, use AVIF to PNG or AVIF to WebP instead.

What does not carry over

The converter decodes the image to pixels and writes a brand-new JPEG. Camera information such as the capture date and GPS position is not copied, which is usually welcome when sharing. Animated AVIF files, which are rare, are converted as their first frame. Wide-gamut colors are mapped to standard sRGB, the color space every viewer expects from a JPG.

Privacy and older browsers

Nothing is uploaded: decoding and encoding happen on your device. Current browsers decode AVIF natively; in an older browser without AVIF support, the tool loads a WebAssembly build of libavif from this site and decodes the file with it, so even outdated systems can convert. If you want to go the other way and make your own pictures smaller for a website, Image to AVIF encodes JPG and PNG files as AVIF, and the general Image Converter covers the everyday formats.