Convert WebP to AVIF
Convert WebP to AVIF by dropping the .webp into this page and pressing the Convert button; AVIF is already chosen as the target. The AV1 encoding runs entirely inside your browser, so nothing is uploaded in the process.
Drop your WebP here
It becomes a AVIF right in your browser, up to 100 MB
Your file never leaves your device
Why convert WebP to AVIF?
This is a publisher's migration pair: sites that adopted WebP years ago can usually shave another 20-50% off image weight by stepping up to AVIF, with transparency still supported. If you are refreshing an asset pipeline or chasing Largest Contentful Paint improvements, transcoding the existing WebP library is the quick experiment before re-exporting from originals. The sensible deployment keeps WebP or JPG as a fallback via the picture element, because AVIF support, while solid in current browsers, is the youngest of the bunch.
What is WebP?
WebP is an image format Google released in 2010, built on VP8 video coding. It offers both lossy and lossless modes, supports transparency in both, can hold animation, and typically lands 25-35% smaller than a comparable JPG. Every modern browser has rendered it since Safari 14 arrived in 2020, but plenty of desktop software, older CMS upload forms and printing services still refuse it.
What is AVIF?
AVIF (AV1 Image File Format) is the newest mainstream image format, published by the Alliance for Open Media in 2019 on top of the royalty-free AV1 codec. It delivers the strongest compression of any widely deployed format, especially at low and medium quality, and adds an alpha channel, HDR and 10/12-bit color. Browser support landed in Chrome 85, Firefox 93 and Safari 16, but much desktop software still cannot open an .avif file.
Quality and what to expect
Two caveats temper the wins. First, this is usually lossy-to-lossy: the AVIF inherits the WebP's artifacts and adds marginal loss of its own, so when originals exist, encoding AVIF from them beats transcoding. Second, AV1 encoding is slow relative to everything else on this site; budget seconds per image, not milliseconds. Alpha channels pass through. If the source WebP was animated, animation does not carry over here; this pair encodes a single still image.
WebP to AVIF FAQ
Should I convert from WebP or go back to my originals?
From originals when you have them: each lossy generation compounds. Transcoding WebP to AVIF is the pragmatic shortcut when originals are gone or the volume makes re-exporting impractical, and at default qualities the compounded loss is minor.
How much smaller does AVIF get compared to WebP?
Commonly 20-50% at similar visual quality, with the best results on smooth gradients and clean graphics. Noisy, detailed photos compress less impressively, and tiny images may not be worth the slower encode.
Is transparency preserved between these two formats?
Yes. Both support full alpha channels and the conversion keeps them, so this pair works for cutout product shots and UI graphics, not just photos.
Why would a privacy-focused site matter for web assets?
For public site assets it matters less, granted. But the same local pipeline means client mockups, unreleased product imagery and embargoed press graphics can be converted without ever placing them on a third-party server.