AVIF vs WebP: Which Modern Image Format Wins in 2026?
AVIF and WebP are both modern image formats designed to replace JPEG on the web. AVIF produces smaller files — but WebP has broader support. This guide breaks down the real-world differences so you can choose the right format for your use case.
Quick Comparison
| Feature | AVIF | WebP |
|---|---|---|
| File size vs JPEG | 40–60% smaller | 25–35% smaller |
| Browser support (2026) | ~90% (Chrome, Firefox, Edge) | ~97% (all modern) |
| Safari support | Partial (iOS 16+) | Full (Safari 14+) |
| Transparency (alpha) | Yes | Yes |
| Lossless mode | Yes | Yes |
| Animation | Yes | Yes |
| Encoding speed | Slow (CPU-heavy) | Fast |
| HDR / wide color gamut | Yes | Limited |
What Is AVIF?
AVIF (AV1 Image File Format) is an image format derived from the AV1 video codec — the same technology used by YouTube, Netflix, and Vimeo for video streaming. It was developed by the Alliance for Open Media (AOM) and standardized in 2019.
Because AV1 was designed to compress video with extreme efficiency, its still-image variant AVIF achieves remarkable compression ratios. At equivalent visual quality, AVIF files are typically 40–60% smaller than JPEG and 20–30% smaller than WebP.
The trade-off is encoding speed. Generating an AVIF file from an original source is significantly more CPU-intensive than encoding WebP or JPEG. For static images on a website, this is a one-time server cost. For user-uploaded content or real-time processing, it can be a bottleneck.
What Is WebP?
WebP was developed by Google and released in 2010. It uses a compression algorithm based on the VP8 video codec for lossy mode and a custom algorithm for lossless mode. It was designed as a single format to replace both JPEG (lossy photos) and PNG (lossless transparency).
WebP achieves 25–35% smaller file sizes than JPEG at the same visual quality — a meaningful improvement for web performance without the encoding complexity of AVIF. As of 2026, WebP support exceeds 97% globally across all modern browsers.
The key advantage WebP has over AVIF is maturity. It is supported in every modern browser, every major CMS, most image CDNs, and most image processing libraries. It is the format Google PageSpeed Insights recommends when it flags "Serve images in next-gen formats."
File Size: How Big Is the Difference?
The compression advantage of AVIF over WebP varies by image content. Photographic images with smooth gradients show the largest AVIF advantage. Images with sharp edges and flat colors show less difference.
| Image type | JPEG baseline | WebP | AVIF |
|---|---|---|---|
| Portrait photo | 300 KB | 200 KB (−33%) | 140 KB (−53%) |
| Product photo (white bg) | 180 KB | 130 KB (−28%) | 100 KB (−44%) |
| Landscape / nature | 500 KB | 320 KB (−36%) | 220 KB (−56%) |
| Screenshot / UI | 120 KB | 90 KB (−25%) | 75 KB (−38%) |
Approximate values at equivalent visual quality (JPEG q80, WebP q75, AVIF q60). Actual results vary by image content and encoder settings.
Browser Support in 2026
WebP has universal support among modern browsers — Chrome, Firefox, Safari 14+, Edge, Samsung Internet, and Opera. Global support exceeds 97%.
AVIF support has grown significantly since 2022. Chrome and Firefox have supported it since 2020–2021. Safari added basic AVIF support in Safari 16 (iOS 16 / macOS Ventura), but support for edge cases (animations, specific encoding profiles) has been inconsistent.
Remaining AVIF gaps as of 2026:
- Older iOS devices (pre-iOS 16) — approximately 5–8% of mobile users
- Some embedded browsers in apps on Android
- Internet Explorer (irrelevant for most sites, but worth noting)
- Some server-side image processors that pre-date AVIF support
The practical implication: if you serve AVIF without a fallback, roughly 7–10% of visitors may see broken images depending on your audience.
The <picture> Element: Best of Both Worlds
For production websites, the recommended approach is to serve AVIF to browsers that support it and fall back to WebP or JPEG for those that do not. The HTML <picture> element handles this automatically:
<picture> <source srcSet="image.avif" type="image/avif" /> <source srcSet="image.webp" type="image/webp" /> <img src="image.jpg" alt="Description" width="800" height="600" /> </picture>
The browser picks the first source it supports. AVIF for modern browsers, WebP for Safari 14–15, JPEG for everything older. No JavaScript required.
Which Should You Use?
Use WebP if you want simplicity
WebP works everywhere, encodes fast, and is supported by virtually all tools and CDNs. For most websites, switching from JPEG to WebP gives the largest performance improvement with the least complexity. This is the right choice for most developers in 2026.
Use AVIF if you prioritize file size
AVIF is worth using if your site serves large volumes of images (e-commerce, news, CDN-heavy), your audience is primarily on modern Chrome/Firefox, and you can implement the <picture> element fallback. The 20–30% additional size reduction over WebP is meaningful at scale.
Serve both with a <picture> element
The best production strategy is AVIF → WebP → JPEG. This gives AVIF benefits to the majority of users while guaranteeing compatibility for everyone else. Most image CDNs (Cloudflare Images, Imgix, Cloudinary) can handle this automatically.
Related Tools
- Compress image — reduce JPEG, PNG, or WebP file size
- JPG to WebP — convert photos to WebP format
- PNG to WebP — convert PNG to smaller WebP
- Convert image format — convert between any supported format
- Best image format for web — full format comparison guide
Frequently Asked Questions
Is AVIF better than WebP?
AVIF produces 20–30% smaller files than WebP at equivalent visual quality, which makes it technically superior in compression. However, WebP has broader browser support (97% vs ~90%) and faster encoding. For most websites in 2026, WebP is the practical choice — use AVIF with a WebP fallback if file size is critical.
Does Safari support AVIF?
Safari 16+ (iOS 16 / macOS Ventura and later) added basic AVIF support. Older Safari versions do not support AVIF. This is why the <picture> element fallback to WebP is important — it ensures Safari users always see the image.
Is AVIF supported in Chrome?
Yes. Chrome has supported AVIF since version 85 (released August 2020). This covers the majority of desktop and Android browser usage.
How much smaller is AVIF compared to JPEG?
At equivalent visual quality, AVIF is typically 40–60% smaller than JPEG. The actual reduction varies by image type — photographs with smooth gradients show the largest improvement, while flat-color images show less difference.
Can I convert images to AVIF or WebP for free?
Yes. Use the free tools at compressimg.pro — JPG to WebP and PNG to WebP convert in your browser without any upload. For AVIF conversion, specialized tools or image CDNs handle this at the server level.
Does WebP or AVIF support transparency?
Both formats support alpha channel transparency. WebP can replace PNG for transparent images with much smaller file sizes. AVIF also supports transparency with even better compression.