Why does the first conversion take a moment?

The AVIF encoder is about 1 to 2 MB of WebAssembly and downloads the first time you use it. After that it's cached and conversions are fast.

Will AVIF be smaller than my PNG?

Usually much smaller, especially for photos and detailed graphics. Tiny flat-color icons save less, since PNG already handles those well.

PNG to AVIF

Re-encodes PNG as AVIF, which lands smaller than WebP at matching quality.

What this does

This redraws each PNG onto a canvas and encodes it as AVIF with a WebAssembly AV1 encoder. At a matched quality, AVIF files come out smaller than WebP, and AVIF's alpha channel preserves transparency from the PNG.

How it works

1Drop your PNG images.
2Download each one, or grab them all as a zip.

Built with open source

jSquash (AVIF) — WebAssembly AVIF image encoder. · Apache-2.0

Frequently asked questions

Related tools

All Convert image →

HEIC to JPGConvert iPhone HEIC photos to JPG. Decodes each HEIC and re-encodes it as a lossy JPG.WEBP to PNGConvert WebP images to PNG. Transparency stays intact.WEBP to JPGConvert WebP images to JPG. JPG is lossy and has no alpha, so transparent areas are flattened onto white.PNG to JPGConvert PNG images to JPG. JPG is lossy and has no alpha, so transparent areas are flattened onto white.HEIC to PNGConvert iPhone HEIC photos to PNG. The output is lossless, so full quality stays.PNG to SVGTrace PNG images into SVG vectors. Works best on logos and silhouettes, not photos.