input.html

<!doctype html><html><head><title>Demo</title><style>body{font-family:sans-serif;margin:2rem}h1{color:#2d6cdf}</style></head><body><h1>Hello, world</h1><p>This HTML is <strong>rendered</strong> locally — nothing is uploaded.</p><ul><li>One</li><li>Two</li></ul></body></html>

preview

Paste HTML to preview it rendered, safely in your browser.

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Online HTML Viewer & Renderer

Paste your HTML on the left and see it rendered instantly on the right. This online HTML viewer runs entirely in your browser — your markup is never uploaded to a server, which makes it safe for internal pages, email templates, and work-in-progress markup.

The preview renders in a sandboxed frame with scripts disabled, so you see the HTML and CSS exactly as a browser lays them out, without running any JavaScript. Use the Format button to pretty-print the source with clean indentation while you work.

View HTML — paste markup and read the rendered result, like an online HTML reader
Render HTML & CSS — inline <style> and attributes are applied in the preview
Format the source — re-indent messy HTML in one click
100% local — a private HTML viewer; nothing leaves your browser

What you can preview

This works as an online HTML viewer, HTML file viewer, HTML previewer, and HTML renderer: paste a full document or a fragment and the frame shows how it looks. Email HTML, exported reports, scraped snippets, and component markup all render the way a browser would draw them.

Why scripts are disabled

A viewer that executed arbitrary JavaScript could leak the very data you paste. Disabling scripts keeps the tool safe and predictable — you get a faithful visual preview of structure and styling. To test interactive behaviour, open the HTML in a real browser tab instead.

FAQ

Is my HTML uploaded anywhere?

No. The viewer renders your HTML locally in a sandboxed iframe. Nothing is sent to a server, so it is safe for confidential markup.

Why doesn't my JavaScript run in the preview?

The preview frame is sandboxed with scripts disabled for security. You see the rendered HTML and CSS, but <script> code does not execute. Open the file in a browser to test scripts.

Can I format the HTML too?

Yes — click Format to re-indent the source with consistent spacing. For a dedicated tool, see the HTML Formatter.