HTML Viewer
Real-Time HTML Code Previewer for Web Developers
Paste your HTML code in the editor to instantly see how it renders in a browser. Perfect for testing snippets, debugging markup issues, or experimenting with new HTML elements.
HTML Code
Preview
HTML Code Examples
Basic HTML Structure
Simple HTML document with common elements
HTML Code
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Sample Page</title>
</head>
<body>
<header>
<h1>Welcome to My Website</h1>
</header>
<main>
<p>This is a sample paragraph with <strong>bold text</strong> and <em>italic text</em>.</p>
</main>
</body>
</html>HTML Form Elements
Various form controls and input types
HTML Code
<form>
<div>
<label for="name">Name:</label>
<input type="text" id="name" name="name" required>
</div>
<div>
<label for="email">Email:</label>
<input type="email" id="email" name="email" required>
</div>
<div>
<label for="message">Message:</label>
<textarea id="message" name="message" rows="4"></textarea>
</div>
<div>
<input type="checkbox" id="subscribe" name="subscribe">
<label for="subscribe">Subscribe to newsletter</label>
</div>
<button type="submit">Submit</button>
</form>CSS Styled Content
HTML with inline CSS for visual styling
HTML Code
<div style="max-width: 600px; margin: 20px auto; font-family: Arial, sans-serif;">
<h2 style="color: #333; border-bottom: 2px solid #007acc;">Styled Content</h2>
<div style="background: #f0f8ff; padding: 15px; border-radius: 8px; margin: 15px 0;">
<h3 style="color: #007acc; margin-top: 0;">Information Box</h3>
<p style="line-height: 1.6;">This is an example of HTML with inline CSS styling. The content is contained within a styled container with custom colors and spacing.</p>
</div>
<button style="background: #007acc; color: white; border: none; padding: 10px 20px; border-radius: 4px; cursor: pointer;">Click Me</button>
</div>HTML5 Semantic Elements
Modern HTML5 semantic structure
HTML Code
<article>
<header>
<h1>Article Title</h1>
<p>Published on <time datetime="2024-01-15">January 15, 2024</time></p>
</header>
<section>
<h2>Introduction</h2>
<p>This article demonstrates the use of HTML5 semantic elements.</p>
</section>
<section>
<h2>Main Content</h2>
<p>Semantic elements provide meaning to the structure of web content.</p>
<aside>
<p><strong>Note:</strong> Semantic HTML improves accessibility and SEO.</p>
</aside>
</section>
<footer>
<p>Author: Web Developer</p>
</footer>
</article>HTML Viewer Features
Real-Time Preview
See changes instantly as you type HTML code
Multiple View Modes
Switch between split, code-only, and preview-only views
Secure Sandbox
Safe environment for testing HTML without security risks
Copy & Share
Easily copy your HTML code to clipboard
Auto-Refresh
Preview updates automatically after code changes
No Setup Required
Start testing HTML immediately without installation
Testing Tips
Getting Started
Start with simple HTML elements and gradually add complexity. Use the split view to see your code and preview side by side, making it easier to understand how different HTML elements render.
Best Practices for Testing
- Test with both simple and complex HTML structures
- Experiment with different HTML5 semantic elements
- Try various form elements and input types
- Test responsive design with different content lengths
- Use inline CSS to see styling effects immediately
Troubleshooting
If your preview doesn‘t update automatically, use the refresh button. Remember that external resources like images or stylesheets from other domains may not load due to security restrictions in the sandbox environment.
HTML Viewer Tips
Usage Instructions
- Enter or paste your HTML code in the editor panel
- View the rendered result in the preview panel
- Switch between split view, code-only, or preview-only modes
- Use the refresh button if the preview doesn‘t update automatically
Limitations
- External resources may be blocked due to security restrictions
- Some JavaScript functionality may be limited in the sandbox environment
- The viewer uses an iframe which may behave slightly differently than a regular browser
What is an HTML Viewer?
Real-Time HTML Preview
An HTML viewer is a tool that allows developers to instantly see how their HTML code will appear in a web browser without needing to save files or set up a local server. It provides immediate visual feedback, making it easier to test and debug HTML markup.
Benefits of Using an HTML Viewer
HTML viewers streamline the development process by eliminating the need to constantly refresh browser tabs or upload files to see changes. They‘re particularly useful for testing HTML snippets, experimenting with new elements, or troubleshooting layout issues quickly and efficiently.
Security Considerations
Our HTML viewer uses a sandboxed iframe environment to ensure security while previewing code. This means that potentially harmful scripts are contained and cannot access your main browser session or personal data. However, some external resources may be blocked as a security precaution.
Best Practices for HTML Testing
When using an HTML viewer, start with simple markup and gradually add complexity. Test your HTML with different viewport sizes and consider how it will look on various devices. Remember that the preview environment may not perfectly replicate all browser behaviors, so final testing in actual browsers is still recommended.
Common Use Cases
HTML viewers are perfect for educational purposes, allowing students to see immediate results of their code changes. Developers use them for rapid prototyping, testing new HTML5 elements, debugging layout issues, and sharing quick demos with colleagues without needing to deploy code to a server.