HTML Viewer - Preview HTML Code Online

Preview and render HTML code in real-time with our free online HTML viewer. See exactly how your HTML will look in a browser without creating files or setting up a server—perfect for testing snippets, debugging, and learning HTML.

What Is an HTML Viewer?

An HTML viewer is a tool that takes HTML code and renders it visually, showing you how the code would appear in a web browser. Instead of creating files and opening them in a browser, you can instantly see the visual output of your HTML.

How to Use

Enter HTML code - Type or paste your HTML
View preview - See rendered output instantly
Edit and iterate - Make changes, see updates
Test responsive - Check at different sizes
Debug visually - Find layout issues quickly

Key Features

Real-time preview - Instant rendering as you type
Full HTML support - Tags, attributes, CSS
Inline CSS - Style elements directly
Responsive testing - View at different widths
Error tolerance - Renders even imperfect HTML
No server needed - Browser-based rendering

What You Can Preview

HTML Elements

<h1>Headings</h1>
<p>Paragraphs with <strong>bold</strong> and <em>italic</em></p>
<ul><li>Lists</li></ul>
<a href="#">Links</a>
<img src="..." alt="Images">
<table>Tables</table>

With Inline CSS

<div style="color: blue; font-size: 20px;">
  Styled content
</div>

Complex Layouts

<div style="display: flex; gap: 10px;">
  <div>Column 1</div>
  <div>Column 2</div>
</div>

Use Cases

Learning & Education

HTML tutorials - Test examples as you learn
Code experiments - Try different approaches
Student exercises - Complete assignments
Teaching demos - Show code in action
Documentation - Verify code samples

Development & Debugging

Quick testing - Verify HTML snippets
Email templates - Preview HTML emails
Widget development - Test embed code
Layout debugging - Find styling issues
Cross-browser prep - Initial visual check

Content Creation

Blog posts - Preview formatted content
Newsletter design - Check email HTML
Documentation - Verify code examples
CMS content - Preview before publishing
Rich text editing - Check HTML output

HTML Elements Reference

Text Elements

Element	Purpose	Example
`<h1>`-`<h6>`	Headings	`<h1>Title</h1>`
`<p>`	Paragraph	`<p>Text here</p>`
`<strong>`	Bold	`<strong>Important</strong>`
`<em>`	Italic	`<em>Emphasis</em>`
`<span>`	Inline container	`<span>Styled</span>`

Structure Elements

Element	Purpose	Example
`<div>`	Block container	`<div>Section</div>`
`<header>`	Page header	`<header>...</header>`
`<nav>`	Navigation	`<nav>...</nav>`
`<main>`	Main content	`<main>...</main>`
`<footer>`	Page footer	`<footer>...</footer>`

Media Elements

Element	Purpose	Example
`<img>`	Image	`<img src="..." alt="">`
`<video>`	Video	`<video src="...">`
`<audio>`	Audio	`<audio src="...">`
`<iframe>`	Embed	`<iframe src="...">`

Testing Tips

Start with Structure

<!DOCTYPE html>
<html>
<head><title>Test</title></head>
<body>
  <!-- Your content here -->
</body>
</html>

Add Inline Styles

<div style="
  max-width: 600px;
  margin: 0 auto;
  font-family: Arial, sans-serif;
">
  Content with styling
</div>

Test Accessibility

<img src="photo.jpg" alt="Description of the photo">
<button type="button" aria-label="Close menu">×</button>

Common HTML Mistakes

Mistake	Problem	Fix
Missing closing tags	Layout breaks	Always close: `<div>...</div>`
Unquoted attributes	May not parse	Use quotes: `src="image.jpg"`
Missing alt text	Accessibility issue	Add: `alt="description"`
Inline styles everywhere	Hard to maintain	Consider `<style>` block
Deprecated tags	Browser warnings	Use modern alternatives

Frequently Asked Questions

Does this run JavaScript?

For security, JavaScript execution may be limited or sandboxed. This tool focuses on HTML/CSS rendering.

Can I include external CSS?

Inline styles and <style> tags work best. External stylesheet loading may be restricted for security.

Will this look the same in all browsers?

The preview uses your current browser's rendering engine. Actual appearance may vary slightly across browsers.

Can I save my HTML?

Copy your code from the input area. The tool doesn't save between sessions.

Is my code stored anywhere?

No. All processing happens in your browser. Your code is never sent to any server.

Can I embed images?

You can use image URLs (http/https). Base64 data URLs also work for images.

HTML Viewer