AVIF and WebP are the two leading modern raster formats for the web. Both outperform JPEG and PNG, but they serve slightly different roles in a 2026 performance strategy.
Compression Comparison
AVIF typically achieves 20–30% smaller files than WebP at equivalent visual quality — and WebP is already 25–35% smaller than JPEG. AVIF is the most compact option for cutting-edge sites.
However, AVIF encoding is slower and tooling is less mature than WebP in many workflows.
Browser Support
| Format | Chrome | Firefox | Safari | Edge |
|---|---|---|---|---|
| WebP | Yes | Yes | Yes | Yes |
| AVIF | Yes | Yes | Yes (16+) | Yes |
WebP has broader historical support. AVIF caught up in recent Safari versions but check your analytics for legacy browser share before going AVIF-only.
Quality and Use Cases
Choose WebP when:
- You need a reliable default for all modern browsers today
- You want fast client-side conversion — use our Image to WebP converter
- You are migrating from JPEG/PNG at scale
Choose AVIF when:
- You need maximum compression and your audience uses current browsers
- You have build pipelines (CDN, CI) that support AVIF encoding
- Every kilobyte counts (high-traffic media sites)
Can You Use Both?
Yes. A progressive strategy many teams use:
- Convert everything to WebP now (big win, easy tooling)
- Add AVIF as a
<picture>source for supported browsers - Keep JPEG as final fallback
See best image formats for websites for the full <picture> pattern.
AVIF vs WebP for SEO
Both improve Core Web Vitals by reducing LCP element size. WebP alone is sufficient for most sites to hit “Good” thresholds. AVIF is an incremental gain for performance-critical properties.
Start With WebP
If you have not adopted modern formats yet, start with WebP — the tooling is simpler and the gains are massive compared to JPEG.
Convert free with our Image to WebP tool or PNG to WebP for graphics.
Learn the basics in What Is WebP?.
Conclusion
AVIF wins on raw compression; WebP wins on ecosystem maturity and ease of adoption. For most sites in 2026, WebP is the right first step — with AVIF as an optional upgrade path.
Try it free — convert in your browser
Put what you learned into practice. These tools run locally on your device — your images never leave your browser.
Related articles
- What Is WebP? A Complete Guide to the Modern Image Format
Learn what WebP is, how it works, browser support, and why it is the best image format for faster websites and better SEO in 2026.
- Best Image Formats for Websites in 2026
A complete guide to choosing the right image format — WebP, AVIF, JPG, PNG, and SVG — for speed, quality, and browser compatibility.
- PNG vs WebP: Which Format Is Better for the Web?
Compare PNG and WebP for file size, transparency, and quality. Learn when to convert PNG to WebP and improve your site speed.