AVIF vs WebP: Next-Gen Image Formats Compared

By ImgForge Team — Published November 14, 2025

AVIF and WebP are the two leading next-generation image formats for the web. Both beat JPEG and PNG on file size, but they make different trade-offs. This guide breaks down exactly where each format excels so you can make an informed choice for your project.

Where These Formats Come From

WebP was released by Google in 2010, derived from the VP8 video codec. It was designed as a single replacement for both JPEG (for photographs) and PNG (for graphics with transparency), supporting both lossy and lossless compression modes along with animation and alpha channel transparency. After a slow start, WebP now enjoys universal browser support.

AVIF (AV1 Image File Format) is newer, standardized in 2019 by the Alliance for Open Media. It is derived from the AV1 video codec — a more modern and complex algorithm than VP8 — which is why AVIF achieves better compression ratios. AVIF also inherits AV1's support for HDR, wide color gamut, and higher bit depths.

Compression Efficiency

AVIF consistently outperforms WebP on compression. Independent benchmarks show that AVIF files are typically 20-50% smaller than equivalent JPEG files and around 10-20% smaller than equivalent WebP files at the same perceptual quality level. For a high-traffic website serving thousands of images per day, this difference translates directly into bandwidth savings and faster load times.

WebP is no slouch either — it produces files roughly 25-35% smaller than JPEG at equivalent quality. For most web projects, WebP is already a significant improvement over legacy formats. AVIF's edge is most pronounced at lower quality settings and with photographic content; for lossless compression of simple graphics, the gap between the two formats narrows considerably.

Visual Quality

At equivalent file sizes, AVIF generally produces better visual quality than WebP, particularly at aggressive compression levels. AVIF handles fine textures, gradients, and skin tones more cleanly. WebP's lossy mode can introduce a characteristic blockiness at low quality settings — similar to JPEG, since both share VP8 lineage.

For lossless compression, WebP lossless is typically 26% smaller than PNG, while AVIF lossless is competitive but can be slower to encode. Both formats support 8-bit and higher color depths, but AVIF's support for 10-bit and 12-bit color makes it the better choice for HDR photography and professional workflows.

Feature Comparison

Both AVIF and WebP share a strong feature set that goes well beyond what JPEG and PNG offer:

• Alpha channel transparency — both formats support full 8-bit transparency, replacing PNG in many use cases
• Animation — both support animated sequences, though WebP animation is more widely supported in image processing tools
• HDR and wide color gamut — AVIF supports HDR natively; WebP does not
• Color depth — AVIF supports 10-bit and 12-bit color; WebP is limited to 8-bit
• Lossless mode — both formats offer lossless compression as an alternative to their default lossy mode

Encoding Speed

Encoding speed is where WebP has a clear advantage. WebP encodes images several times faster than AVIF using typical settings. For on-the-fly image resizing or real-time conversion pipelines, this matters — AVIF encoding can take noticeably longer, especially at high quality settings.

Decoding speed (how fast a browser renders the image) is more similar between the two formats, though WebP has a slight edge. For most end-users, both formats render quickly enough that decoding speed is not a bottleneck. The encoding speed difference is primarily relevant for server-side image processing.

Browser Support

Both formats now have broad browser support, but WebP reached universal support several years before AVIF:

When to Use Each Format

The right choice depends on your priorities and constraints:

Choose WebP when:

• You need fast server-side encoding in a real-time image processing pipeline
• You need animated image support with broad tooling compatibility
• You want maximum browser compatibility without using the HTML picture element fallback pattern

Choose AVIF when:

• Maximum compression efficiency is the priority — bandwidth savings matter for high-traffic sites
• You are working with HDR photography or content requiring wide color gamut support
• You can pre-encode images offline and serve them statically, avoiding real-time encoding overhead

Explore our detailed format guides for AVIF, WebP, and JPG to dive deeper into each format's specifications.

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