HTML Prettify
Beautify and format your HTML code with proper indentation and spacing. Transform minified or messy HTML into clean, readable code with customizable formatting options. Perfect for code reviews, debugging, and maintaining consistent code style across your team.
Formatting Options
HTML Input
Formatted Output
Recommended Settings
Pro Tips
- •Enable live preview to see formatting changes in real-time as you edit
- •Use 2-space indentation for most web projects; 4-space for enterprise codebases
- •Enable 'Wrap attributes' for tags with many attributes to improve readability
- •Turn off 'Preserve newlines' when reformatting heavily minified HTML
Most Popular
2-space indentation, preserve newlines enabled, live preview for quick edits
When to Use This Tool
Format minified or compressed HTML to make it readable for code reviews and debugging. Essential for understanding third-party HTML, legacy code, or minified production files. Proper formatting makes it easier to spot bugs, understand structure, and review changes.
Standardize HTML formatting across your team to maintain consistent code style. Ensures all developers follow the same indentation and spacing conventions, making code reviews faster and reducing merge conflicts. Consistent formatting improves code maintainability.
Make HTML examples more readable for tutorials, documentation, and learning materials. Well-formatted code is easier to understand and teach to others. Students and beginners benefit from clean, properly indented HTML that clearly shows structure and nesting.
Transform minified production HTML back into a readable format for analysis or modification. When you need to understand or edit HTML that's been compressed for production, prettifying makes the code manageable. Particularly useful for reverse-engineering or adapting existing templates.
How It Works
Configure formatting options: Choose indentation type (spaces or tabs), indent size, and formatting preferences like attribute wrapping and newline preservation
Paste or type your HTML code into the input textarea on the left side
Optional: Enable live preview to see real-time formatting as you type (500ms debounce)
Click 'Prettify HTML' to format your code with the selected settings (or let live preview handle it automatically)
Review the formatted output in the right panel and check the statistics showing size and line count changes
Copy the formatted HTML to clipboard or download it as a .html file for use in your project
Use the Clear button to reset all fields and start fresh with new HTML code
100% Private
Files never leave your device. All processing happens locally in your browser.
Lightning Fast
Powered by Pure JavaScript for optimal performance on modern browsers.
Secure
No data collection, no tracking, no sign-up required.
Frequently Asked Questions
What does HTML prettifying/beautifying do?
HTML prettifying formats your HTML code with proper indentation, line breaks, and spacing to make it more readable. It organizes tags, attributes, and content in a consistent, human-friendly format without changing how the HTML renders in browsers. The tool uses the js-beautify library for professional-grade formatting.
Can I format minified HTML?
Yes! This tool is perfect for making minified HTML readable again. It will add proper indentation, line breaks, and spacing to compressed HTML code. Disable 'Preserve newlines' when working with heavily minified HTML to let the formatter create an optimal structure from scratch.
What's the difference between tabs and spaces?
Tabs and spaces are different whitespace characters for indentation. Tabs are single characters that editors can display at different widths, while spaces are always the same size. Most web projects use 2-space indentation for compactness, while enterprise codebases often prefer 4 spaces or tabs. Choose based on your team's coding standards.
Will formatting change how my HTML renders?
No, prettifying only affects whitespace and formatting. Your HTML will render exactly the same way in browsers - it just becomes more readable and easier to maintain for developers. The tool preserves content inside <code>, <pre>, <script>, and <style> tags where whitespace is significant.
What does 'Wrap attributes' do?
When enabled, wrap attributes forces each HTML attribute onto its own line, aligned with the first attribute. This is useful for tags with many attributes (like <img> or <input>) as it makes each attribute easier to read and modify. For tags with few attributes, you might prefer to keep this disabled for more compact code.
How does live preview work?
Live preview automatically formats your HTML as you type, with a 500ms delay to avoid excessive processing. This is perfect for quick edits and real-time formatting feedback. Turn it off for large files or when you want manual control over when formatting occurs.