Convert PNG to AVIF in your browser for the smallest web-ready files, keeping transparency. Works in Chrome and Edge.

The smallest option available

AVIF compresses better than anything else in wide browser use — routinely half the size of a comparable JPG, and a fraction of a PNG for photographic content. It keeps transparency, supports wide colour and high dynamic range, and every current browser can display it.

For a photograph or a rich illustration destined for a web page, this is the conversion that saves the most bandwidth.

Encoding needs Chrome or Edge

Reading AVIF is universal now; writing it from a web page is not. This converter uses your browser’s own encoder, and at present that means Chrome or Edge. In Safari or Firefox the page will tell you the format cannot be written rather than quietly handing you a PNG named .avif.

Where AVIF is the wrong choice

Small, flat graphics. AVIF carries a fixed header overhead, so a tiny icon can come out larger than its PNG. Below a few kilobytes, keep the PNG.
Images that must stay exact. Lossy AVIF is very good, but a diagram or a screenshot with fine text can lose crispness. Keep quality high, or use WebP.
Anything that leaves the browser. Attachments, print workflows and older desktop software still largely cannot open AVIF.

Serve it with a fallback

Because encoding support is narrower than decoding support, AVIF is best served through a <picture> element with a WebP or JPG source after it, so a browser that cannot display the AVIF gets something it can.

Your files stay here

Conversion happens in your browser. Nothing you pick is uploaded.