AVIF: The Future of Web Images Explained

The web image landscape is experiencing its biggest shift since the introduction of WebP. AVIF (AV1 Image File Format) promises to deliver images that are 50% smaller than JPEG and 20% smaller than WebP — with the same or better visual quality. But what exactly is AVIF, and should you start using it today?

What is AVIF?

AVIF is an image format based on the AV1 video codec, developed by the Alliance for Open Media (AOMedia) — a consortium that includes Google, Apple, Microsoft, Mozilla, Netflix, Amazon, and many other tech giants. It was standardized in 2019 and has been rapidly gaining browser support since.

The key insight behind AVIF is simple: modern video codecs are incredibly efficient at compressing visual content. By applying these advanced video compression techniques to still images, AVIF achieves compression ratios that were previously impossible.

How AVIF Compares to Other Formats

AVIF vs JPEG

JPEG has been the dominant web image format for over 30 years, but it’s showing its age. AVIF consistently outperforms JPEG in quality-per-byte comparisons:

• At equivalent visual quality, AVIF files are 40-50% smaller than JPEG
• AVIF supports 10-bit and 12-bit color depth (vs JPEG’s 8-bit), enabling HDR content
• AVIF supports alpha transparency (JPEG does not)
• AVIF handles smooth gradients much better, without the banding artifacts common in JPEG

AVIF vs WebP

WebP, introduced by Google in 2010, was the previous “next-generation” format. AVIF pushes the boundary further:

• AVIF achieves approximately 20% better compression than WebP
• Both support transparency, animation, and lossy/lossless modes
• AVIF has better color science with wider color gamut support
• WebP currently has better browser support and faster encoding times

AVIF vs PNG

For lossless content like screenshots and graphics:

• AVIF lossless mode produces files significantly smaller than PNG
• Both support full alpha transparency
• PNG has universal support while AVIF support is still expanding
• PNG is the safer choice for maximum compatibility

Browser Support in 2026

AVIF support has expanded dramatically:

Browser	AVIF Support
Chrome	85+ (since Aug 2020)
Firefox	93+ (since Oct 2021)
Safari	16.4+ (since Mar 2023)
Edge	85+ (since Aug 2020)
Opera	71+ (since Aug 2020)
Samsung Internet	16+

As of 2026, AVIF is supported by over 95% of web users globally. The remaining 5% are on older browsers that can be served JPEG or WebP fallbacks.

Technical Deep Dive

Why is AVIF So Efficient?

AVIF leverages several advanced techniques from the AV1 video codec:

1. Larger Block Sizes: While JPEG works with 8x8 pixel blocks, AVIF can use blocks up to 64x64 pixels. Larger blocks capture patterns more efficiently in areas of uniform content.

2. Intra Prediction: AVIF can predict pixel values based on neighboring blocks within the same image. This is borrowed from video codec inter-frame prediction, adapted for still images.

3. Film Grain Synthesis: Instead of encoding noisy texture detail, AVIF can store film grain parameters and synthesize matching noise during decoding. This dramatically reduces file size for photographic content.

4. Better Transform and Quantization: AVIF uses more sophisticated mathematical transforms than JPEG’s DCT, capturing visual information more efficiently.

AVIF Limitations

Despite its advantages, AVIF has some practical limitations:

• Encoding speed: AVIF is significantly slower to encode than JPEG or WebP. A single image may take several seconds to encode, compared to milliseconds for JPEG
• Maximum dimensions: Early implementations limited images to 8193x4320 pixels, though this has been relaxed in newer versions
• Software support: Many image editing applications still don’t natively support AVIF import/export
• Decoding on older hardware: Without hardware decoder support, AVIF decoding can be CPU-intensive

How to Start Using AVIF

For Web Developers

The recommended approach is progressive enhancement using the HTML <picture> element:

<picture>
  <source srcset="image.avif" type="image/avif">
  <source srcset="image.webp" type="image/webp">
  <img src="image.jpg" alt="Description">
</picture>

This serves AVIF to browsers that support it, WebP as a secondary option, and JPEG as the universal fallback. The browser automatically selects the best format it supports.

For Content Creators

If you need to convert existing images to AVIF, our browser-based converter handles the process locally. Convert your JPEG, PNG, or WebP images to AVIF to see the file size savings firsthand — all without uploading your images to any server.

Quality Settings

For AVIF, recommended quality settings differ from JPEG:

• Quality 60-70: Equivalent to JPEG quality 80-85. Good for general web use
• Quality 50-60: Equivalent to JPEG quality 70-80. Acceptable for thumbnails
• Quality 70-80: Equivalent to JPEG quality 90-95. For high-quality galleries

The Bigger Picture: Format Evolution

The progression from JPEG (1992) to WebP (2010) to AVIF (2019) shows a clear trend: each generation of formats leverages more sophisticated algorithms to pack more visual quality into fewer bytes.

Looking ahead, JPEG XL is another promising format that offers both lossless JPEG recompression and excellent lossy compression. However, its future is uncertain after Chrome removed support in 2023.

For the foreseeable future, the practical approach is to serve AVIF with WebP and JPEG fallbacks. This combination ensures every user gets the best format their browser supports, while maximizing performance for the majority.

Conclusion

AVIF represents a genuine leap forward in image compression. With 50% smaller files than JPEG, support for HDR and transparency, and 95%+ browser coverage, it’s ready for production use in 2026. Combined with fallback strategies, you can start benefiting from AVIF today while maintaining universal compatibility.

Convert your images to AVIF with WasmConvert — entirely in your browser, with zero quality compromise and complete privacy.