Convert PNG to AVIF

Convert PNG images to AVIF with transparency, for the smallest web graphics and photos. Batch up to 100 files, locally in your browser.

Good to know

AVIF supports alpha, so transparent PNGs stay transparent.
Large PNG photos and renders shrink most; tiny icons may not.
Always keep a fallback (PNG or WebP) in <picture> for browsers without AVIF display support.

Can visitors see AVIF?

For websites, the safe pattern is a <picture> element listing AVIF, then WebP, then a JPG fallback; each browser picks the first it supports. More in WebP vs AVIF.

Other converters: JPG to WebP · PNG to WebP · WebP to JPG · WebP to PNG · JPG to AVIF · AVIF to JPG

Questions

Is transparency preserved?

Yes. The AVIF encoder keeps the alpha channel.

Are my files uploaded for conversion?

No. The conversion runs in your browser with WebAssembly codecs. Files never leave your device.