Can JavaScript in my HTML run in the preview?

Yes. Scripts in your code run inside the sandboxed preview, but the sandbox blocks the preview from touching this site, your cookies, or your other tabs.

Can I save the preview as a file?

Yes. Download .html saves exactly what is in the editor, and Open in new tab shows the full page on its own tab.

HTML Viewer — View & Render HTML Code Online Free

Paste HTML code and see the live rendered preview instantly.

699 chars · 32 lines

HTML code

Live preview

Preview runs sandboxed in your browser: scripts in your code can run, but the preview cannot touch this site, your cookies, or your other tabs. Your code is never uploaded anywhere.

How to use the HTML Viewer

1
Paste your HTML code into the editor on the left.
2
The live preview on the right updates automatically as you type.
3
Use Sample to reload the demo page, or Clear to start blank.
4
Download the code as a .html file, or open the preview in a new tab.

100% Free

No Signup Needed

Private & Secure

Works on Mobile

Privacy: This tool runs 100% in your browser. Your files and text are processed on your own device and never uploaded to any server — you can verify this in your browser's Network tab.

HTML Viewer FAQs

No. The code stays in your browser and the preview renders locally in a sandboxed frame — nothing is sent to any server.

About this tool

HTML Viewer answers the simplest question a developer or student asks: what does this code actually look like? Paste any HTML — a full page or a snippet — and the live preview renders it instantly beside the editor, updating as you type, so you can test layouts, styles and small scripts without saving files or opening an editor. The preview runs in a sandboxed frame in your browser: scripts in your own code can run, but the frame cannot reach this site, your cookies or your other tabs, and your code is never uploaded anywhere. It is ideal for checking email templates, landing-page sections, homework and forum snippets before you publish them. When the page looks right, download it as a .html file or open the preview in a new tab to see it full-screen.