Converting WebP to AVIF typically cuts file size further, often 20–30% smaller than the WebP at matched perceived quality. If you're serving modern browsers and want the smallest possible files, AVIF is the more aggressive choice.
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Transcoding between two lossy codecs adds a small quality hit. Encoding at similar quality produces output very close to the source. AVIF encoding is much slower than WebP: minutes versus seconds for large batches.
AVIF works in Chrome 85+, Firefox 93+, Safari 16+, and modern Edge. Native OS support on macOS and iOS. Some design tools still need plugins.
WebP is Google's 2010 image format based on the VP8 video codec. It offers lossy and lossless modes, full alpha transparency, and animation in a single container. At matched quality it's typically 25–35% smaller than JPG or PNG. Every major browser has supported it since 2020.
AVIF is an image format built on the AV1 video codec, standardized in 2019. It supports HDR, wide color gamut, 12-bit depth, alpha, and animation. At matched perceived quality it's typically 50% the size of JPG and 20% smaller than WebP. Support is near-universal in modern browsers but spottier in image editors.
Typically 20–30% smaller than the WebP at equivalent perceived quality. The exact ratio depends on content and quality settings.
Yes. AVIF supports full alpha channels at multiple bit depths. Transparent regions in the WebP transfer cleanly.
WebP is Google's 2010 image format based on the VP8 video codec. It offers lossy and lossless modes, full alpha transparency, and animation in a single container. At matched quality it's typically 25–35% smaller than JPG or PNG. Every major browser has supported it since 2020.
AVIF is an image format built on the AV1 video codec, standardized in 2019. It supports HDR, wide color gamut, 12-bit depth, alpha, and animation. At matched perceived quality it's typically 50% the size of JPG and 20% smaller than WebP. Support is near-universal in modern browsers but spottier in image editors.
Yes. The converter runs entirely in your browser using WebAssembly. Your images are never uploaded, never sent to a server, and never leave your device.
There's no hard limit, but because everything runs in your browser you're bounded by available memory. Very large images (over a few hundred megapixels) can hit browser memory limits. Process in smaller batches if you run into issues.