Free HTML Viewer Online
Preview HTML in your browser instantly. Paste code, upload a file, or load from URL. Syntax highlighting, live preview, beautify and minify in one tool.
HTML Viewer
What is an HTML Viewer?
An HTML viewer is a tool that renders raw HTML code and displays it as a formatted web page, exactly as a browser would render it. Unlike opening a local file, an online HTML viewer lets you paste code, share results, and test snippets without creating files on your machine. Developers use HTML viewers to test email templates, debug layouts, inspect scraped HTML, and validate markup before publishing.
How to Use This HTML Viewer
- 1Paste your HTML into the left editor, upload an .html file, or click URL to load from any public URL.
- 2Click Run / View to render the HTML in the preview panel on the right.
- 3Edit your HTML and click Run again, or enable Auto Update to see changes in real time.
- 4Use the Code tab to see beautified output, the Preview tab for the rendered page, or the Diff tab for before/after comparison.
- 5Download the formatted HTML or copy it to clipboard using the toolbar buttons.
HTML Viewer vs Browser DevTools
| Feature | This HTML Viewer | Browser DevTools |
|---|---|---|
| Test pasted code | Yes | No |
| Load from URL | Yes | Partial |
| Beautify HTML | Yes | No |
| Minify HTML | Yes | No |
| Download output | Yes | No |
| Live DOM inspection | Preview only | Full |
| CSS debugging | Inline only | Full |
Frequently Asked Questions
How do I view HTML code in a browser?
Paste your HTML into the editor and click Run / View. The preview pane renders it instantly, just like a real browser.
Can I test HTML with CSS and JavaScript?
Yes. The iframe preview renders full HTML including inline and embedded CSS and JavaScript. External CDN resources load if you have internet access.
Is my HTML code safe?
Yes. All processing is 100% client-side. Your code never leaves your browser except when loading from a URL.
Can I load HTML from a URL?
Yes. Click the URL button, paste any public URL, and click Load. Our server proxy fetches the HTML and loads it into the editor.
What is the difference between View and Beautify?
View renders your HTML as a visual preview. Beautify reformats the raw HTML code with proper indentation, making it readable without changing how it renders.