JPG to AVIF Converter

AVIF compresses far better than JPG, so web pages load faster and use less data. Every current browser shows it. Keep your JPGs for printing and for apps that don’t read AVIF yet.

AVIF is slow to encode: the encoder tries many ways to describe each part of the picture to find the smallest. It runs on your device, one image at a time. Large photos use a faster setting so they finish in seconds.

It keeps every pixel exactly. Lossless AVIF files are much larger than normal ones, and a JPG already lost detail when it was saved, so lossless rarely helps for photos. It suits screenshots and graphics better.

Yes, once: browsers can read AVIF but can’t write it, so the page loads an AVIF encoder (libavif with the AOM AV1 encoder, about 1.1 MB compressed) when you start. It then works offline too.

Up to 20 files per batch, up to 50 MB each and 200 MB in total. Files are processed one after another; download each one as soon as it is ready, or all of them as a ZIP.

Very large images are refused to keep your browser from running out of memory: above 100 megapixels on computers and 50 megapixels on phones and tablets. On iPhone and iPad, formats other than HEIC are limited to about 16 megapixels by Safari.

It is free to use and there is nothing to sign up for. There are no watermarks and no daily limits.