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AVIF (AV1 Image File Format)

A modern, royalty-free image format based on the AV1 video codec — the best compression of any web image format.

Definition

AVIF (AV1 Image File Format) is an image format that encodes still images using the AV1 video codec. It supports lossy and lossless compression, an alpha channel for transparency, animation, 12-bit color depth and wide color gamuts, and produces the smallest files of any current web image format.

In practice

At matched visual quality, AVIF files are roughly 50–60% the size of JPEG and 80% the size of WebP. Supported in Chrome, Firefox, Safari 16.4+ and Edge — over 96% of browsers in 2026. Its encoder is slower than WebP's, which is why batch tools run it in background workers.

Related guides

AVIF compressorWebP vs AVIFWhat is WebP?

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Frequently asked questions

AV1 Image File Format. It encodes still images using the AV1 video codec, which is why it achieves better compression than older image formats.

Yes. AVIF is royalty-free and open, backed by the Alliance for Open Media. There are no licensing fees for encoding or decoding.

Chrome, Firefox, Safari 16.4 and later, Edge, and all modern mobile browsers — over 96% of global traffic in 2026. A WebP or JPEG fallback inside a <picture> element covers the remainder.