AVIF vs WebP for Web Images: Which Format Should You Export?

AVIF vs WebP at a glance

Both AVIF and WebP are modern web formats designed to replace JPG and PNG with smaller files at similar or better quality. WebP, from Google, has been around since 2010 and is supported everywhere that matters today. AVIF, based on the AV1 video codec, is newer and compresses harder — often noticeably smaller than WebP at the same visual quality, especially for detailed photographic content.

The trade-off is not quality versus size alone; it is also encode speed and operational simplicity. AVIF squeezes files smaller but takes longer to encode, while WebP is faster and simpler to slot into an existing pipeline. For most teams the answer is not 'pick one forever' but 'know when each one wins'.

Compression and quality

On photographic images, AVIF typically produces the smallest file for a given perceived quality, with better handling of gradients and fewer blocky artifacts at low bitrates. WebP is still a big improvement over JPG, but at aggressive compression it can show banding where AVIF stays clean.

For flat graphics, logos and screenshots, the gap narrows, and lossless WebP is often a practical choice. The honest test is always side-by-side preview at your real target size — the 'better' format is the one that hits your size budget without visible degradation on your actual images.

Browser support and fallbacks

WebP is supported by every current major browser, which makes it the safe default when you want one format with minimal fallback logic. AVIF support is now broad across modern Chrome, Firefox, Safari and Edge, but older browser versions and some tools still lack it.

The robust pattern is to serve AVIF with a fallback: use the HTML picture element to offer AVIF first, then WebP, then a JPG as a last resort. That way modern visitors get the smallest file and everyone else still sees an image. If you cannot manage multiple sources, WebP alone is the lower-risk single-format choice.

When to choose AVIF

Pick AVIF when file size is the priority and you can manage a fallback.

• Image-heavy pages where every KB counts for Core Web Vitals.
• Detailed photography where AVIF's cleaner low-bitrate output shows.
• You can serve a picture element with WebP/JPG fallbacks.
• Encode time is not a bottleneck in your build or export pipeline.

When to choose WebP

Pick WebP when simplicity, speed and universal support matter more than the last few percent of size.

• You want one format with no fallback complexity.
• Fast, high-volume encoding is important for your workflow.
• Broad compatibility with older tools and browsers is a requirement.
• The images are graphics or screenshots where the size gap is small.