HTML Minifier Beautifier

What is HTML Minifier Beautifier?

HTML Minifier Beautifier is a free online tool for minifying and beautifying HTML code. It helps you reduce HTML file size by removing whitespace and comments, or format HTML code with proper indentation for better readability.

Whether you're optimizing HTML for production, debugging minified HTML, or improving code readability, this tool makes it easy to format and compress HTML instantly.

How to Use

1. Paste HTML Code: Enter or paste your HTML code into the input area
2. Choose Action:
   • Beautify: Format HTML with proper indentation and newlines
   • Minify: Remove all unnecessary whitespace and comments
3. Select Indentation: Choose 2 spaces, 4 spaces, or 1 tab (for beautify)
4. Copy Result: Use the copy button to copy the formatted HTML

Features

• Minify HTML to reduce file size
• Beautify minified HTML for readability
• Adjustable indentation (2/4 spaces or tabs)
• Remove comments automatically
• Show size reduction percentage
• One-click copy to clipboard
• Swap input/output functionality
• Dark mode support
• Mobile-friendly interface
• Client-side processing (no server upload)

Use Cases

1. Production Optimization

Minify HTML files before deploying to production to reduce bandwidth and improve page load times.

2. Code Review

Beautify minified HTML from production or third-party sources to review the code structure.

3. Code Formatting

Format HTML code with consistent indentation for better readability and maintainability.

4. Learning & Debugging

Make minified HTML readable again to understand how third-party HTML templates work.

5. Version Control

Beautify HTML before committing to version control for better diff visibility.

Minify vs Beautify

Minify

• Purpose: Reduce file size for production
• Benefits: Faster page loads, reduced bandwidth
• Result: All whitespace removed, single line
• Use case: Production deployment

Beautify

• Purpose: Improve code readability
• Benefits: Easier to read and maintain
• Result: Properly indented, multiple lines
• Use case: Development and code review

HTML Optimization Best Practices

DO

• Minify HTML files for production deployment
• Keep original (beautified) files for development
• Remove unused HTML/commented code before minifying
• Combine multiple HTML files where possible before minifying

DON'T

• Edit minified HTML directly (always work with beautified version)
• Commit minified HTML to version control without source
• Minify HTML during development (harder to debug)
• Remove all comments (keep important ones in source)

How It Works

Minification Process

1. Remove all comments (<!-- ... -->)
2. Remove whitespace between tags (> ... <)
3. Collapse multiple spaces into one
4. Remove leading and trailing whitespace

Beautification Process

1. Add newlines and indentation for nested tags
2. Format attributes and content for readability
3. Remove comments (if present)

File Size Reduction

Typical HTML minification can reduce file size by:

• 20-40% for well-formatted HTML
• 40-60% for HTML with extensive comments
• 10-20% for already compact HTML

Example:

• Original: 20 KB (beautified with comments)
• Minified: 12 KB (40% reduction)

Frequently Asked Questions

Does minifying HTML affect functionality?

No. Minification only removes whitespace and comments. The HTML structure and content remain identical, so functionality is preserved.

Can I beautify any minified HTML?

Yes, but the output may not match the original formatting since minification removes structural information like comment placement and blank lines.

Does beautifying add comments back?

No. Comments are permanently removed during minification and cannot be recovered.

Can I use this for inline HTML in JavaScript?

Yes, but extract the HTML first. This tool expects pure HTML syntax.

Is there a file size limit?

No hard limit, but very large files may take longer to process in the browser.

What's the difference between minify and compress?

Minifying removes whitespace. Compression (like gzip) is done by the web server and provides additional size reduction.

Should I minify HTML for development?

No. Use beautified HTML during development for easier debugging. Minify only for production.

Privacy & Security

Your privacy is important:

• All processing happens locally in your browser
• No HTML code is sent to any server
• No data is stored or logged
• Completely free and secure to use

Credits

• js-beautify: Beautifier for HTML.