Layout testing with live preview
The HTML viewer pairs a markup editor with a live preview. You see how a block, table, or form renders and tweak CSS without running a local server.
Source code panel
Write or paste HTML, add inline styles, and check semantics. A character counter helps with email and widget limits.
Sample snippets load a starter template—handy for learning flex and grid quickly.
Rendered output beside it
The preview updates as you type, like a browser would show end users. Sandbox styles do not leak from the app header.
Parse issues surface immediately instead of after deploy.