The Short Answer
AVIF wins on raw compression and image quality — it consistently produces smaller files than WebP at the same visual fidelity, and it adds HDR support that WebP lacks. WebP wins on compatibility and practicality: broader browser support, much faster encoding, and wider acceptance in image editors and CMS platforms. Neither format is wrong; the right pick depends on who's viewing your images and how fast you need to generate them.
Format Overview
AVIF (AV1 Image File Format) is built on the AV1 video codec and represents the current state of the art in image compression. It was released in 2019 by the Alliance for Open Media and is now supported natively by all major modern browsers, though encoding it is computationally expensive.
WebP, developed by Google in 2010, was the previous generation's answer to the same problem — smaller files than JPG and PNG, with transparency and animation support. It encodes far faster than AVIF and has had a decade-long head start building software support.
AVIF vs WebP: Full Comparison Table
| Feature | AVIF | WebP |
|---|---|---|
| Compression | Best available | Excellent |
| Transparency | Yes | Yes |
| Animation | Yes | Yes |
| Browser Support | Chrome 85+, Firefox 93+, Safari 16+ | Chrome 17+, Firefox 65+, Safari 14+ |
| Editing Support | Very limited | Limited |
| File Size | Smallest | Small |
| HDR Support | Yes | No |
| Encoding Speed | Slow | Fast |
| Best For | Web delivery | Web images, broad compatibility |
When to Use AVIF
Reach for AVIF when you're optimizing for the smallest possible file size on modern browsers and you control the image pipeline — a build step, a CDN with on-the-fly transforms, or a CMS that pre-generates formats. It's the strongest choice for bandwidth-sensitive delivery, especially for large hero images or photo-heavy galleries where every kilobyte counts.
When to Use WebP
Choose WebP when you need broader compatibility without fallback complexity, faster encoding at build time, or animated images that need to work reliably across more platforms. It's also the safer pick if your image editing tools or CMS plugins don't yet support AVIF.
When to Convert Between Them
Convert AVIF to a more compatible format when a file needs to open in a desktop image editor, get printed, or display correctly for users on older browsers. Our AVIF to PNG converter gives you a lossless, universally compatible file, or use AVIF to JPG for a smaller, still-universal alternative — both run entirely in your browser.