HTML Prettifier
Format and beautify your HTML code with proper indentation, syntax validation, and error highlighting.
Input HTML
0 characters
Formatted Output
Ready
What is an HTML Prettifier?
An HTML prettifier (also called an HTML formatter or beautifier) is an online tool that transforms minified or poorly formatted HTML code into a clean, human-readable format with proper indentation and line breaks. Our HTML prettifier validates your HTML syntax, highlights errors, and offers minification for production use.
HTML (HyperText Markup Language) is the standard markup language for creating web pages and web applications. While minified HTML reduces file size for faster loading, it's nearly impossible for developers to read and maintain. An HTML formatter makes your code clean and professional.
How to Use the HTML Formatter
1. Paste your HTML code into the input editor on the left
2. Click "Prettify" to beautify with proper indentation (2, 4, or 8 spaces)
3. Use "Minify" to compress HTML for production deployment
4. Toggle "Preserve comments" to keep or remove HTML comments
5. Click "Download" to save the formatted output as an .html file
💡 All processing happens in your browser—your data never leaves your device.
Common Use Cases
• Email Template Development
Clean up and format HTML email templates for better readability and maintenance
• Web Scraping & Data Extraction
Format scraped HTML to understand structure and extract data more easily
• Code Review & Debugging
Beautify minified HTML from production sites for debugging and analysis
• Learning & Education
Study well-formatted HTML examples to learn web development best practices
• Template Optimization
Clean up CMS-generated or framework-generated HTML for better performance
Key Features
✓ HTML5 Support
Supports all HTML versions including HTML5
✓ Beautify & Minify
Format for readability or compress for production
✓ Comment Control
Choose to preserve or remove HTML comments
✓ Download Output
Save formatted HTML as a file
Frequently Asked Questions
Is my HTML code safe and private?
Yes! All HTML processing happens entirely in your browser using JavaScript. Your data never leaves your device and is not sent to any server. This makes our tool safe for formatting sensitive templates or web pages.
What's the maximum HTML file size?
Since processing happens in your browser, the limit depends on your device's memory. Most modern browsers can handle HTML files up to 10-50MB without issues. For extremely large HTML documents, consider using a desktop code editor.
Does it work with HTML5?
Yes! Our HTML prettifier supports all HTML versions including HTML5, XHTML, and legacy HTML4. It properly formats modern HTML5 tags like <article>, <section>, <nav>, and self-closing tags.
Can I use this for email templates?
Absolutely! Our HTML formatter is perfect for cleaning up email templates. It properly handles inline styles, table-based layouts, and other email-specific HTML patterns while maintaining compatibility.