AVIF vs WebP: Which Image Format Is Better in 2026?

Quick Comparison Table

The table reveals the central trade-off: AVIF compresses better and has more features (HDR, wide color), while WebP encodes faster and enjoys wider compatibility. Let's examine each dimension in detail.

Compression Efficiency

This is the most important comparison point for most users. Both formats exist primarily to reduce image file sizes compared to JPEG, and AVIF does it meaningfully better than WebP.

Lossy Compression: AVIF Wins by 20–25%

At equivalent perceptual quality (measured by metrics like SSIM, VMAF, and Butteraugli), AVIF lossy files are approximately 20–25% smaller than WebP lossy files. Both formats are dramatically smaller than JPEG, but AVIF pushes the compression frontier further.

Here are representative file sizes for a 12-megapixel photograph at equivalent visual quality:

The savings come from AV1's more advanced compression pipeline: larger and more flexible block sizes (up to 128×128 vs WebP's 16×16 macroblocks), over 60 directional prediction modes (vs VP8's 10), multi-scale transforms, and a more efficient arithmetic entropy coder.

Lossless Compression: Close Contest

In lossless mode, the gap narrows considerably. Both AVIF and WebP produce lossless files approximately 20–30% smaller than PNG for photographic content. AVIF has a slight edge (typically 5–10% smaller than WebP lossless), but the difference is less dramatic than in lossy mode. For simple graphics, the two formats perform comparably.

Image Quality Comparison

Raw file size is only half the story. What matters is the visual quality at a given file size — and this is where AVIF and WebP diverge in subtle but important ways.

Photographs and Gradients: AVIF Is Superior

AVIF excels at preserving photographic detail, especially in challenging areas that cause problems for other formats:

• Smooth gradients — sky, skin tones, and subtle color transitions are rendered without banding. AVIF's 10/12-bit internal processing preserves more tonal steps than WebP's 8-bit pipeline.
• Low-contrast detail — texture in shadows, fabric patterns, and foliage retain more structure at equivalent file sizes. AV1's prediction models are better at preserving these subtle details.
• Artifacts at aggressive compression — when both formats are pushed to very small file sizes, AVIF's artifacts tend to be softer and less objectionable than WebP's, which can exhibit ringing and blockiness inherited from VP8's simpler block structure.

Simple Graphics: WebP Holds Its Own

For images with large areas of flat color, sharp text, and geometric shapes, WebP performs well relative to AVIF. The VP8L lossless codec is specifically optimized for these patterns, and the gap between the two formats narrows to near-zero for simple graphic content. In some cases with very few colors and large flat areas, WebP lossless can even produce marginally smaller files.

HDR and Wide Color Gamut

This is AVIF's most significant technical advantage over WebP — and it is not even close.

AVIF: Full HDR Support

AVIF supports:

• 10-bit and 12-bit color depth per channel (1,024 or 4,096 levels per channel vs WebP's 256)
• PQ (Perceptual Quantizer) transfer function for HDR content mastered for specific peak brightness
• HLG (Hybrid Log-Gamma) transfer function for backwards-compatible HDR that looks acceptable on SDR displays
• BT.2020 and Display P3 wide color gamuts that cover colors sRGB cannot represent — vivid reds, greens, and cyans that modern OLED screens can actually display

This makes AVIF the only widely-supported web image format that can deliver true HDR content to HDR-capable displays. For photographers, e-commerce, and visual media, this is a tangible advantage: product colors appear more vivid and accurate, landscape photos show more dynamic range, and UI elements can use the full color capabilities of modern screens.

WebP: SDR Only

WebP is limited to 8-bit sRGB. It has no support for HDR transfer functions, no support for wide color gamuts, and no support for color depths beyond 8 bits per channel. This was a reasonable limitation in 2010 when WebP was designed, but in 2026, with HDR displays shipping in the majority of new phones, laptops, and monitors, it is an increasingly significant shortcoming.

If you need to deliver HDR images on the web, AVIF is currently your only practical option among widely-supported formats.

Browser Support

Browser compatibility determines whether you can actually use a format in production, and both AVIF and WebP have strong but slightly different support profiles in 2026.

WebP: ~97% Global Support

WebP has been supported in Chrome since 2014 and gained Safari support in 2020 (macOS Big Sur / iOS 14). By 2026, WebP works in virtually every browser that is still in use:

• Chrome, Edge, Opera, Brave, Vivaldi — since 2014+
• Firefox — since version 65 (January 2019)
• Safari — since version 14 (September 2020)
• Samsung Internet, UC Browser — full support

The only browsers lacking WebP support are IE 11 (discontinued) and extremely old mobile browsers. For all practical purposes, WebP is universal.

AVIF: ~94% Global Support

AVIF support is slightly behind WebP but has closed the gap dramatically:

• Chrome — since version 85 (August 2020)
• Edge — since version 90 (April 2021)
• Firefox — since version 93 (October 2021)
• Safari — since version 16 (September 2022)
• Samsung Internet — since version 14 (2021)

The 3% gap between AVIF (~94%) and WebP (~97%) consists primarily of Safari 14–15 users (who support WebP but not AVIF) and older mobile browsers. This gap continues to shrink as users update their browsers and devices.

Encoding and Decoding Speed

This is where WebP has a clear, significant advantage.

Encoding Speed: WebP Is 5–10x Faster

WebP encoding takes approximately 2x longer than JPEG — fast enough for real-time use cases. AVIF encoding takes approximately 8–10x longer than JPEG, which can be a bottleneck for:

• Real-time image processing — user-uploaded images that need to be converted on the fly
• Large-scale batch processing — converting millions of existing images to a new format
• CDN edge conversion — services like Cloudflare and Fastly that convert images at the edge per request
• CMS workflows — content management systems that generate multiple image variants on upload

The encoding speed difference is the single biggest practical barrier to AVIF adoption. However, several factors are mitigating this:

• Hardware encoders — Intel Arc, NVIDIA RTX 40-series, AMD RDNA 3, and Apple M4 all include hardware AV1 encoders that dramatically reduce encoding time
• Speed presets — AVIF encoders like libaom and libsvtav1 offer speed presets that trade some compression efficiency for faster encoding. At speed 6 (out of 10), SVT-AV1 encodes approximately 3x faster than the default setting with only a 5–10% increase in file size
• Pre-encoding — for static websites, images can be encoded to AVIF during the build step, making encoding speed irrelevant for the end user

Decoding Speed: Both Are Adequate

Decoding speed (how quickly the browser renders the image for the user) is competitive between the two formats. WebP decoding is slightly faster due to the simpler VP8 codec, but AVIF decoding is well within acceptable ranges for web use. Users will not perceive a difference in page rendering between the two formats — the network transfer time saved by AVIF's smaller files typically more than compensates for any marginal decoding difference.

Animation Support

Both AVIF and WebP support animated images, offering modern alternatives to GIF.

• Animated WebP uses VP8 compression for each frame with inter-frame prediction, producing files approximately 50–65% smaller than equivalent GIFs with full color support (no 256-color limitation).
• Animated AVIF uses AV1's full inter-frame compression, producing files approximately 60–80% smaller than GIFs — and 20–30% smaller than animated WebP for the same content.

For animation, the same trade-offs apply: AVIF produces smaller files but encodes more slowly, while WebP offers a better balance of compression and speed. Both formats support variable frame rates, full color, and transparency in animated sequences — features that GIF lacks.

Recommendation for Web Developers

The optimal strategy in 2026 is not to choose between AVIF and WebP, but to use both via progressive enhancement.

The <picture> Element Approach

The HTML <picture> element lets you specify multiple image sources with automatic browser selection:

This approach delivers the best possible experience to every visitor:

• AVIF users (~94%) get the smallest files, fastest loads, and HDR support if applicable
• WebP-only users (~3%) get significantly smaller files than JPEG, with transparency and animation support
• JPEG fallback users (~3%) get a universally compatible image that works everywhere

If You Can Only Choose One

If your workflow or CMS only supports a single next-gen format, here is how to decide:

• Choose AVIF if you prioritize maximum compression, need HDR support, or your encoding pipeline can handle the speed overhead (pre-build, background processing, or hardware encoding).
• Choose WebP if you need real-time encoding, maximum browser compatibility, or your infrastructure cannot handle AVIF's encoding cost at scale.

Offline and Sharing Use

For files shared outside the browser — via email, messaging apps, cloud storage, or USB — neither AVIF nor WebP is the best choice. JPEG remains the universal interchange format that every device, application, and service understands.

If you receive AVIF or WebP images that you need to share, print, or use in legacy software, converting to JPEG ensures universal compatibility. The file will be larger, but it will work everywhere without question.