What AVIF is
AVIF stores images with the AV1 video codec. It supports 8-, 10- and 12-bit colour, transparency, HDR and animation, and usually produces smaller files than JPG or WebP at the same visual quality.
Browser support is about 95% of users (caniuse): Chrome 85+, Firefox 93+, Edge 121+ and Safari 16.4+. This page uses your browser’s built-in decoder, so no extra download is needed.
Why convert AVIF to JPG
- Older photo viewers, office suites and image editors that cannot open .avif files.
- Upload forms, marketplaces and print services that accept only JPG or PNG.
- Sharing with people whose devices do not preview AVIF.
Expect the JPG to be bigger
AVIF compresses far more efficiently than JPG, so the converted file grows. In our tests a 1204×800 AVIF of 80,743 bytes became 158,939 bytes as JPG at quality 85 (1.97 times), and a 722×1024 AVIF went from 85,445 to 141,167 bytes (65% larger).
The row note explains this so it is not mistaken for an error. If size matters, use quality 75–80 or reduce the dimensions under Resize.
HDR and 10-bit images
JPG stores 8 bits per channel in standard dynamic range. A 10-bit or HDR AVIF is converted by the browser to 8-bit sRGB, so bright highlights can look duller and very saturated colours may shift slightly.
For photos from phones that save HDR AVIF, compare the result with the original before deleting anything.
Transparency and animated AVIF
Transparent areas in an AVIF are filled with the background colour you pick, and the row reports how much of the image was transparent.
An animated AVIF (an image sequence) is detected from its file header; only the first frame is converted and the row says so.
If the file will not open
A “cannot open AVIF” message means the browser has no AVIF decoder, typically Safari 16.3 or older. Update the browser or use a current Chrome, Edge or Firefox.
If other AVIF files work, the file may be damaged or truncated; try downloading it again.