Free Online WEBP to AVIF Converter
Convert WebP to AVIF format. Free online conversion.
Max file size 10MB. Sign up for more.
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Checking files and selected output formats.
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WebP to AVIF: upgrading to the latest codec
AVIF's AV1 codec achieves 20-30% better compression than WebP's VP8 at equivalent quality. Both are modern formats, but AV1 uses more advanced prediction modes, larger transform blocks (up to 64×64 vs VP8's 16×16), and film grain synthesis that preserves the visual texture of photographs at very low bitrates. The conversion decodes VP8-compressed data and re-encodes with AV1, adding one generation of lossy compression.
When to convert WEBP to AVIF
Convert WebP to AVIF when squeezing the last percentage of file size reduction from web images. The gains are most noticeable on large hero images and product photography. For small thumbnails and icons, the savings may not justify the slower encoding time and slightly reduced browser support.
WebP vs AVIF: Side-by-side
Technical comparison of the two formats — useful for deciding which to use, or for confirming what changes during conversion.
| Property | WebP | AVIF |
|---|---|---|
| Full name | WebP (Google) | AV1 Image File Format |
| Year introduced | 2010 | 2019 |
| Developer / standard body | Alliance for Open Media | |
| MIME type | image/webp | image/avif |
| File extension | .webp | .avif |
| Compression | Lossy or lossless (VP8/VP8L) | Lossy or lossless (AV1) |
| Color / data depth | 24-bit + 8-bit alpha | 8/10/12-bit |
| Max dimensions / size | 16,383 × 16,383 px | 65,536 × 65,536 px |
| Transparency | Yes | Yes |
| Animation | Yes | Yes |
| Standard / specification | RFC 9649 (lossless), RFC 6386 (VP8) | AOMedia AV1 |
| Best for | Modern web — 25–35% smaller than JPG/PNG at equivalent quality | Next-gen web images — 50% smaller than JPG, 20% smaller than WebP |
About the WebP Format
WebP is a modern image format developed by Google in 2010, based on the VP8 video codec. It supports both lossy and lossless compression modes, giving developers and designers flexibility to choose the right balance between quality and file size. WebP images are typically 25-35% smaller than equivalent-quality JPEG files, making it a compelling choice for web performance optimization.
WebP excels in web environments where bandwidth and loading speed are critical. It combines features that previously required multiple formats — lossy compression like JPEG, transparency like PNG, and animation like GIF — all in a single format. With over 97% browser coverage across Chrome, Firefox, Safari, and Edge, WebP has become one of the most practical choices for modern web development. Its primary limitation is reduced support in older desktop software and some native image editors.
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