Developer tools
Edit rich text or HTML and inspect an isolated preview.
Highlight preview is limited to 100,000 characters; the source editor preserves the full document.
The visual editor normalizes supported rich text. Use source editing to preserve arbitrary HTML. Pasted active content and external media are removed from the visual editor.
Drafts are stored only when you press Save draft locally. They may contain sensitive content. Nothing is saved automatically.
Preview scripts, navigation, forms and external requests are disabled. The iframe has no parent-origin or storage access. Source and exported HTML remain separate from the sanitized preview. Undo: Ctrl/Cmd+Z. Redo: Ctrl+Y or Cmd+Shift+Z.
Edit source or rich text and inspect the isolated preview. Save drafts explicitly.
Try <h1>Hello</h1><p>A local HTML draft.</p>.
No. The sandboxed preview blocks scripts, forms and external network requests.