HTML Viewer
Paste raw HTML and see it rendered live in a sandboxed preview, right next to the source — no upload, scripts never run.
Input
Preview
Guides
The HTML Viewer renders pasted HTML as a live preview next to the source, so you can check how a snippet, email template or landing-page fragment actually looks without saving a file or opening a code editor.
How to use it
- Paste or type raw HTML into the source panel on the left.
- The preview on the right updates as you type — no run button needed.
- Copy/paste in and out of the source panel like any text box; there's nothing to save or upload.
Is it safe to preview HTML I don't fully trust?
Yes. The preview renders inside a sandboxed <iframe> with scripts disabled — any <script> tag in your markup is simply ignored, so pasted HTML can't run JavaScript, read cookies, submit forms, or navigate the page. CSS and images still render normally, so the preview looks the way the page would if scripts were the only thing stripped out.
Does it validate or clean up my HTML?
No — the viewer renders exactly what you paste, malformed tags included, the same way a browser would. If you want your markup pretty-printed or minified instead of previewed, use the HTML Formatter/Beautifier. For a rich-text editor that produces clean HTML as you type, see the WYSIWYG HTML Editor.
Is my HTML uploaded anywhere?
No. Rendering happens entirely in your browser; nothing you paste is sent to a server or stored.