Source Code Viewer

View and analyze source code with syntax highlighting. Support for HTML, CSS, JavaScript, and 10+ languages with search and export features.

Language:

Line NumbersWord Wrap

Source Code Input

<!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>
    <style>
        body {
            font-family: Arial, sans-serif;
            margin: 0;
            padding: 20px;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        }
        .container {
            max-width: 800px;
            margin: 0 auto;
            background: white;
            border-radius: 8px;
            padding: 20px;
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
        }
        h1 { color: #333; }
    </style>
</head>
<body>
    <div class="container">
        <h1>Hello, World!</h1>
        <p>This is a sample HTML page with embedded CSS and JavaScript.</p>
        <button onclick="showMessage()">Click Me</button>
    </div>
    <script>
        function showMessage() {
            alert('Button clicked!');
            console.log('User interaction logged');
        }
    </script>
</body>
</html>

Highlighted View (38 lines)

Beautiful Syntax Highlighting

View source code with professional syntax highlighting. Support for HTML, CSS, JavaScript, Python, and more. Search, copy, and download with ease.

Features

Auto-Detection

Automatically detects programming language and applies appropriate highlighting.

Line Numbers

Toggle line numbers for easy reference when discussing specific code sections.

Search & Highlight

Search within code with real-time highlighting of all matching occurrences.

Export Options

Copy to clipboard or download as a file with the correct extension.

How this Source Code Viewer works

This syntax highlighting tool displays source code with automatic language detection and professional formatting. The viewer parses input code, identifies the programming language from syntax patterns, and applies appropriate color schemes for keywords, strings, comments, and operators.

Supported languages include HTML, CSS, JavaScript, TypeScript, Python, Java, PHP, Ruby, SQL, JSON, XML, YAML, and Markdown. The automatic detection analyzes file patterns, keywords, and structural elements to determine the most likely language. Line number display and word wrap options improve readability.

Real-time search highlights matching text within code while maintaining syntax coloring. Copy and download functions export code with original formatting preserved. All processing runs client-side—paste proprietary source code confidently knowing it never leaves your browser.

How to Use

Paste or Upload

Paste source code directly or upload a file from your computer.

View with Highlighting

Code is automatically syntax-highlighted based on detected language.

Search & Export

Search within code, copy to clipboard, or download as a file.

Example Usage

Viewing a complete webpage source:

Input

HTML page with CSS and JavaScript

Output

Syntax-highlighted code with line numbers

Frequently Asked Questions

What languages are supported?

The viewer supports HTML, CSS, JavaScript, JSON, XML, Python, Java, PHP, Ruby, SQL, Markdown, and YAML with automatic language detection.

Can I view source code from a URL?

For security reasons, browsers restrict fetching source from external URLs. You can use browser DevTools (View Source) and paste the code here.

How does the search feature work?

Enter a search term to highlight all matching occurrences in the code. The search is case-insensitive and updates in real-time.

Can I download the viewed code?

Yes! Click the Download button to save the source code as a file with the appropriate extension based on the detected language.

Is my code secure?

Absolutely. All processing happens in your browser. No code is sent to any server, making it safe for proprietary source code.

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The Source Code Viewer is maintained by CodeItBro. We aim to provide the best free developer tools on the web. If you have feedback or suggestions, please visit our contact page.