What is AVIF (AV1 Image File Format)?
Complete guide to the AVIF file format
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What is AVIF (AV1 Image File Format)?
AVIF is a modern image format based on the AV1 video codec. It delivers significantly better compression than JPEG and WebP while maintaining excellent visual quality.
AVIF can reduce image file sizes by 50% or more compared to JPEG at equivalent quality, making it the most efficient image format available today for web use.
How AVIF Works
AVIF stores still images as keyframes coded with the AV1 video codec, packaged inside the ISO Base Media File Format container, making it structurally a sibling of HEIC that swaps HEVC for AV1.[2] The format supports a wide feature set including alpha transparency, high dynamic range with up to 12 bits per channel, wide color gamut, and both lossy and lossless modes.[1] AV1's intra-prediction and transform tools are what allow it to retain detail at low bitrates where older codecs introduce blocking.[3]
History and Standardization
The AVIF specification is published by the Alliance for Open Media, the same industry consortium (including Google, Mozilla, Netflix, and others) that developed the royalty-free AV1 codec.[2] The first specification was finalized in 2019, and browser support followed in Chrome and Firefox in 2020 and Safari in 2022.[4] Unlike HEIC, AVIF is explicitly royalty-free, which removed a major barrier to native browser adoption.[4]
AVIF vs WebP and JPEG
Compared with WebP, AVIF generally achieves higher compression efficiency and supports higher bit depths and HDR, though it can be slower to encode.[1] Its main practical drawback relative to JPEG is encoding time and the lack of progressive decoding, so very large images may appear all at once after download rather than refining gradually.[3]
Technical Details
AVIF vs Other Image Formats
| Feature | AVIF | JPG | WebP | HEIC |
|---|---|---|---|---|
| Based on | AV1 codec[2] | DCT | VP8 | HEVC |
| Compression | Best in class[1] | Moderate | Good | Very good |
| Transparency | Yes[1] | No | Yes | Yes |
| Animation | Yes[1] | No | Yes | Yes |
| Licensing | Royalty-free[2] | Free | Free | Licensed |
| Browser support | Broad | Universal | Broad | Limited |
AVIF offers the strongest compression and a royalty-free license, while JPG remains universally compatible and HEIC is favored within Apple's ecosystem.
Pros and Cons
Advantages
AVIF offers 50-80% smaller file sizes than JPEG at equivalent visual quality.
Native HDR and wide color gamut support for future-proof image quality.
Supports transparency, animation, and HDR in a single format.
Backed by Google, Netflix, Apple, and Microsoft - strong long-term support guaranteed.
Disadvantages
AVIF encoding is slower than JPEG or WebP, making it less ideal for real-time image processing.
Safari before 16, older Android browsers, and IE do not support AVIF.
Many image editors and viewers do not yet fully support AVIF format.
As a newer format, AVIF has less tooling and ecosystem support than JPEG or PNG.
When to Use AVIF (AV1 Image File Format)
Here are the most common situations where AVIF (AV1 Image File Format) is the right choice:
Web Optimization
Use AVIF for web images where bandwidth and loading speed are critical.
Progressive Enhancement
Serve AVIF to modern browsers with JPEG fallback for older browsers.
Photography Sites
Image-heavy photography portfolios and e-commerce sites benefit greatly from AVIF.
Mobile Web
AVIF's excellent compression is especially valuable for mobile users on limited data plans.
Convert AVIF (AV1 Image File Format) Files
Need to convert your AVIF files? Use our free online converter.
Try Image Converter FreeFrequently Asked Questions about AVIF (AV1 Image File Format)
Is AVIF better than WebP?
AVIF generally achieves 20-50% better compression than WebP at equivalent quality, especially for photographs.
Is AVIF supported by all browsers?
AVIF is supported by Chrome, Firefox, Edge, and Safari 16+. Use a JPEG fallback for older browsers.
How do I use AVIF on my website?
Use the HTML picture element to serve AVIF with JPEG fallback:
Can Photoshop open AVIF?
Photoshop CC 2021 and later support AVIF with a plugin. Newer versions have native AVIF support.
Should I convert all my images to AVIF?
For web use, yes - AVIF will reduce bandwidth and improve load times. For archives, keep PNG or TIFF.