PNG to AVIF Converter
without uploading it.
Re-encode a PNG as AVIF — typically several times smaller, with transparency preserved.
Drop an image, or click to browse
Drop a PNG or click to browse.
Click "Convert to AVIF".
Download the result.
Why there's no upload step
AVIF is the most efficient image format browsers support today — for web pages, an AVIF is routinely 50–90% smaller than the PNG it replaces, which directly improves page speed scores. This tool encodes AVIF entirely in your browser using WebAssembly, so nothing is uploaded and there's no file-size cap beyond your device's memory.
Is my PNG uploaded anywhere?+
No — encoding runs locally in your browser via WebAssembly.
Is transparency preserved?+
Yes, AVIF fully supports alpha transparency.
Where can AVIF files be used?+
All modern browsers (Chrome, Firefox, Safari, Edge) display AVIF. Older software and some CMS uploaders may not accept it yet — keep the PNG for those.
Why is encoding slow for big images?+
AVIF compression does much more work than PNG or JPG — that's where the size savings come from. Large images can take several seconds on-device.