HTML Viewer

View and preview HTML code in real time with syntax highlighting

What is an HTML Viewer?

An HTML viewer renders your HTML code in real time so you can see the visual result while you edit.

How to use it

Type or paste HTML into the editor on the left. The preview on the right updates automatically. Switch between Preview and Source tabs to inspect the rendered page or the code.

  • The preview supports HTML, CSS and inline styles.
  • External resources are blocked for safety.

Tips

Use it to prototype a small page, debug layout issues, or check how an email template looks.

Frequently Asked Questions

Does the preview run scripts?+
The preview renders in a sandboxed iframe, so scripts are not executed for safety. Static HTML, CSS and inline styles work fully.
Is my HTML sent anywhere?+
No. Everything runs in your browser — your code never leaves your device.
Can I copy the rendered output?+
Use the Source tab to copy your HTML code, or the preview to check the visual result.

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HTML Viewer — free online html viewer, html preview, html renderer, online html viewer, html code viewer, preview html, html sandbox, view html online. No signup required. Works in your browser.