Claude's desktop apps can now build HTML-in-Canvas sites and artifacts

Anthropic's Felix Rieseberg enabled HTML-in-Canvas in Claude's desktop apps, so Claude can build sites and artifacts that combine interactive HTML elements with canvas graphics. He calls it a footnote change next to everything else, but one that lets Claude make "bizarre & beautiful sites" that remind him of the Flash days.

The page stays a real web page while the canvas bends it. In one demo a black hole warps a headline, and every word is still real text that you can select, retype or feed to the hole. In another, a paragraph heats up and melts as you scroll. The browser still has every letter, so you can select the drips, and they paste into an email as straight text.

Rieseberg's demo artifact, The Explainer, links 15 experiments, including Hotel Hypertext, Liquid Glass, Knitted Page and Droste. It describes HTML-in-Canvas as a new development feature.

To try it, tell Claude you'd like to use HTML-in-Canvas. The demo page says it's switched on in Claude's desktop apps from version 5.11492, and that Safari and Firefox don't have it yet.