What Is an AVIF File?
An AVIF file is an image in the AV1 Image file format.
Files are compressed with AV1 (AOMedia Video 1) algorithms and stored in the HEIF container format.

Netflix TechBlog
The AV1 compression technology that this image format uses is royalty-free.
So there are zero licensing fees, meaning that compressing and decoding files can be done without paying royalties.
Reduced size means lessbandwidthis required, which in turn means lower data usage and storage.
Color depth is another way AVIF outperforms JPEG.
The latter is limited to8-bit color depthwhile AVIF supportsHDR.
This translates to richer colors and more detail.
Netflix has some good visual examplescomparing identical images when compressed as JPEGs vs AVIFs.
Othercomparisons of the WebP and PNG formatsare also worth checking out.
you’re able to test whether its working by visitingthis AVIF test page.
Thefree nomacs image vieweris another option.
Its a downloadable program that runs on Windows and Linux.
How to Convert an AVIF File
Convertiois the easiest way to convert an AVIF file.
It all happens in your web client, and bulk conversions are supported, so it’s really fast.
Still Cant Open It?
When this happens, you might get an error alert saying that the program doesnt support your file.
If this is happening, theres a good chance you dont actually have an AVIF file.
For example,AVIis a video format that shares the first three file extension letters.
But videos and images dont always open with the same program.
The same is true for other similar-looking ones likeAIFFand AVL.