AVIF Format: Next-Gen Image Format Guide

What Is AVIF?

AVIF stands for AV1 Image File Format. It is an image format derived from the AV1 video codec, developed by the Alliance for Open Media — a consortium that includes Google, Apple, Mozilla, Netflix, and Amazon. The format was finalized in 2019 and has gained rapid browser adoption since then.

AVIF delivers significantly smaller file sizes compared to JPEG and WebP at equivalent visual quality. In independent tests, AVIF images are typically 30-50% smaller than JPEG and 20-30% smaller than WebP. This translates directly to faster page loads, lower bandwidth costs, and better Core Web Vitals scores.

The format supports both lossy and lossless compression, HDR (high dynamic range) content, wide color gamuts (including P3 and Rec. 2020), transparency (alpha channel), and animated sequences. This combination of features makes it the most capable image format available for the web today.

AVIF vs WebP vs JPEG

Each format occupies a different point on the quality-size-compatibility spectrum:

• JPEG: Universal compatibility. No transparency. Lossy only. Larger files at comparable quality. The safe default when you need every browser and device to work, including legacy systems.
• WebP: 25-34% smaller than JPEG. Supports transparency and animation. Supported by all modern browsers since 2020. A solid middle ground with wide compatibility.
• AVIF: 30-50% smaller than JPEG. Supports transparency, animation, HDR, and wide color gamut. Browser support is strong but not yet universal — older Safari versions and some mobile browsers may not support it.

For photographic content, AVIF excels at preserving detail in gradients and textures while aggressively compressing file size. Where JPEG shows banding and blocking artifacts, AVIF remains smooth. WebP falls between the two — better than JPEG but not as efficient as AVIF.

One notable trade-off: AVIF encoding is slower than JPEG or WebP. Encoding a single image can take several seconds depending on the quality settings and image dimensions. This is acceptable for static assets that are encoded once and served many times, but less practical for real-time conversion.

Browser Support

As of 2024, AVIF is supported in Chrome (desktop and Android), Firefox, Opera, Samsung Internet, and Safari 16.4 and later. This covers roughly 92% of global web traffic according to Can I Use data.

The practical approach is to serve AVIF as the preferred format with fallbacks. The HTML <picture> element makes this straightforward:

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

The browser picks the first format it supports, falling through to JPEG as the universal fallback. This pattern delivers the smallest possible file to capable browsers without breaking anything for older ones.

How to Convert Images to AVIF

There are several paths to generating AVIF files:

• Online converters: Upload a JPEG or PNG and download the AVIF version. No software installation needed. Best for one-off conversions or small batches.
• Command-line tools: avifenc (from libavif) and cavif offer fine-grained control over quality, speed, and color settings. Ideal for build pipelines and batch processing.
• Image CDNs: Services like Cloudflare Images, Imgix, and Cloudinary can convert and serve AVIF automatically based on the client's Accept header.
• Build tools: Webpack, Vite, and Next.js can generate AVIF variants during the build step, so images are ready to serve without runtime conversion.

When converting, start with quality settings around 60-70 for lossy compression. AVIF quality numbers do not correspond directly to JPEG quality numbers — an AVIF at quality 60 often looks better than a JPEG at quality 80.

Convert AVIF with Our Free Tool

Our AVIF to JPG converter lets you convert AVIF files to widely compatible JPEG format directly in your browser. This is useful when you receive AVIF images but need to share them with people or systems that do not support the format yet.

The conversion runs entirely in your browser using Web APIs. No files are uploaded to any server, so your images stay private. You can convert single files or batch-process multiple AVIF images at once.

AVIF is the future of web images. Adopting it now, with appropriate fallbacks, gives your site a measurable performance advantage while remaining compatible with every visitor's browser.