HTML Viewer
Preview and edit HTML code directly in your browser with a live-rendered preview...Preview and edit HTML code directly in your browser with a live-rendered preview. Paste or upload HTML to see it rendered instantly. Switch between ed...
Drag & Drop or Click to Upload
Supports .html and .htm files
HTML Viewer Features
Edit, preview, and inspect HTML
Why Use HTML Viewer?
Instant Live Preview
See your HTML rendered in real time as you type. Changes appear instantly in the sandboxed preview pane without refreshing.
Responsive Device Frames
Preview your HTML on Desktop, Tablet (768px), and Mobile (375px) screen sizes with realistic browser-style device frames.
Source Editor with Line Numbers
Edit HTML in a dark-themed code editor with line numbers, syntax-friendly monospace font, and keyboard shortcuts.
Built-in Console Output
Capture console.log, console.error, and console.warn messages from your HTML scripts displayed right below the preview.
Common Use Cases
Why preview HTML online
Quick HTML Prototyping
Rapidly prototype HTML layouts and components with instant visual feedback. Perfect for testing snippets before integrating into a project.
Responsive Design Testing
Check how your HTML renders across Desktop, Tablet, and Mobile sizes without deploying. Catch layout issues early.
Learning HTML & CSS
Students and beginners can experiment with HTML and see results instantly. Great for tutorials and code-along exercises.
Email Template Preview
Preview HTML email templates to verify layout, styling, and links before sending. Test across different viewport widths.
How It Works
Load Your HTML
Drag and drop an .html file, paste HTML code into the editor, or click 'Sample HTML' to load a demo page.
Edit and Preview
Use the split view to edit HTML on the left while seeing live-rendered output on the right. Toggle between view modes as needed.
Test Responsiveness
Switch between Desktop, Tablet, and Mobile device frames to see how your HTML looks at different screen sizes.
Export or Share
Download the HTML as a file, copy the source code to clipboard, or use Format/Minify to clean up the code.
Pro Tips for HTML Viewing
Use Split View
Split view lets you edit and preview simultaneously. Use horizontal split on wide screens and vertical split on narrow ones.
Go Fullscreen
Click the fullscreen button to maximize the editor and preview area, removing page chrome for a focused editing experience.
Format Before Sharing
Use the Format button to pretty-print messy or minified HTML before sharing with teammates or saving for documentation.
Check Console Output
If your HTML has JavaScript, check the console panel for errors. It captures log, warn, and error messages from the iframe.
Frequently Asked Questions
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