Canvas is a little web playground — write HTML, CSS, and JavaScript in the tabs and watch it render live in the preview, with a console for your logs and errors. When you're happy, export it all as a single self-contained HTML file. Everything runs in a sandbox in your browser; nothing is uploaded.

Auto-run

Previewsandboxed

The preview runs in a sandboxed iframe that can't reach this page, your files, or your other tabs. The HTML pane is the page body; the CSS and JS are wired in for you. console.log, warnings, and errors are forwarded to the console panel below the preview. Export bundles all three into one standalone .html file you can open or host anywhere. Nothing is uploaded.