WEBP to AVIF Converter

Both formats are considerably more efficient than older codecs, but AVIF’s AV1-based compression generally edges out WEBP for photographic content — typically a further 10–20% smaller at matching visual quality. On a flat-coloured graphic or simple icon the gap narrows, and WEBP can occasionally come out ahead, since both formats already handle that kind of content efficiently.

For a photo-heavy web page already using WEBP, converting the largest images to AVIF is often the next practical step down in total page weight, without changing how the images look.

AVIF supports up to 10-bit colour per channel against WEBP’s 8-bit, which shows up as smoother gradients in skies, shadows and other soft colour transitions. Both formats support full alpha transparency, so a transparent WEBP logo or sticker keeps its see-through background exactly after converting to AVIF — nothing is flattened or filled in.

Encoding AVIF does take noticeably longer than WEBP for the same image, a consequence of its more advanced compression, but since this runs once in your browser rather than repeatedly on a server, the only real cost is a slightly longer wait during the conversion itself.

AVIF display support is broad now — Chrome, Firefox and Edge have supported it for several years, and Safari added it from version 16 — so a website image converted to AVIF will render correctly for the great majority of visitors, similar to WEBP’s own reach at this point. The gap that remains is mostly in older software outside the browser: some desktop viewers, a handful of design tools, and a few content management systems still cannot open AVIF, so it is worth keeping the WEBP as a fallback if the image needs to work in an environment you don’t fully control.

The WEBP is decoded and re-encoded to AVIF entirely on your device, so an image is never sent to a server just to shrink it further. Convert a single graphic or a whole batch, and download the results individually or as a ZIP — a practical way to squeeze extra savings out of a media library that has already been converted to WEBP once.