HTML Formatter

HTML Formatter - Format and Beautify HTML Online

A powerful online HTML formatter and beautifier tool that helps you format, beautify, and minify HTML code. Features syntax highlighting, customizable indentation, and attribute wrapping options. Perfect for web developers, designers, and anyone working with HTML markup.

What is HTML?

HTML (HyperText Markup Language) is the standard markup language for creating web pages and web applications. HTML describes the structure of a web page using a series of elements (tags) that tell browsers how to display content.

HTML is used for:
- Creating web page structure and layout
- Defining content like headings, paragraphs, links, and images
- Embedding multimedia content
- Building forms for user input
- Structuring data with semantic elements

HTML works together with CSS for styling and JavaScript for interactivity to create complete web experiences.

What does this HTML Formatter do?

This tool provides two main functions:

1. Format (Beautify): Takes compressed or poorly formatted HTML and makes it readable with proper indentation and line breaks. You can choose indent size (2, 4, or 8 spaces, or tabs) and optionally wrap attributes on separate lines for better readability.

2. Minify: Removes all unnecessary whitespace, line breaks, and comments to create the smallest possible HTML file. Useful for reducing file size in production and improving page load times.

Both functions include syntax highlighting to make HTML tags, attributes, and values easy to distinguish.

How do I format HTML?

Formatting HTML is simple:

1. Paste or type your HTML code in the input field
2. Select your preferred indent size (2, 4, or 8 spaces, or tab)
3. Optionally check 'Wrap attributes' if you want each attribute on its own line
4. Click the 'Format' button
5. View the beautifully formatted HTML in the output section

The formatted HTML will have:
- Proper indentation for nested elements
- Each tag clearly visible on its own line
- Syntax highlighting with colors for tags, attributes, and values
- Easy to read and maintain structure

What's the difference between Format and Minify?

Format and Minify are opposite operations:

Format (Beautify):
- Adds indentation, line breaks, and spacing
- Makes HTML human-readable and editable
- Increases file size
- Best for development, debugging, and maintenance
- Makes it easy to understand document structure
- Example: A 1KB minified HTML might become 3KB when formatted

Minify:
- Removes all unnecessary whitespace and line breaks
- Removes HTML comments
- Makes HTML compact and optimized
- Reduces file size significantly
- Best for production and deployment
- Improves page load speed
- Example: A 3KB formatted HTML becomes 1KB when minified

Use Format when you're developing or need to edit HTML, and Minify when you're ready to deploy to production.

What does 'Wrap attributes' mean?

The 'Wrap attributes' option controls how HTML tag attributes are formatted:

Without wrapping (default):
<div class="container" id="main" data-value="123">

With wrapping enabled:
<div
class="container"
id="main"
data-value="123">

This is useful when:
- Tags have many attributes
- You want better readability for complex elements
- You're working with components that have lots of data attributes
- You need to compare different versions of HTML (easier to see attribute changes)

Note: Wrapped attributes use one additional level of indentation for clarity.

Does this tool validate HTML?

This tool focuses on formatting and beautifying HTML code, not strict validation. It will:

✓ Format any HTML-like text you provide
✓ Preserve your HTML structure as-is
✓ Apply proper indentation and spacing
✓ Add syntax highlighting

✗ Does not check for missing closing tags
✗ Does not verify HTML5 compliance
✗ Does not validate attribute values
✗ Does not check semantic correctness

For strict HTML validation, use the W3C Markup Validation Service or browser developer tools. This formatter is designed to make your code more readable, not to fix structural errors.

Will minifying HTML break my website?

No, properly minified HTML will not break your website. The minification process:

✓ Safe operations:
- Removes whitespace between tags
- Removes line breaks
- Removes HTML comments
- Preserves all functional code
- Maintains tag structure and attributes

⚠ Consider these cases:
- Whitespace inside <pre> tags is preserved
- Inline JavaScript and CSS remain functional
- Document structure stays intact
- All attributes and values are kept

Minification is a standard practice for production websites. Major websites use minified HTML to improve load times. However, always test your minified HTML in a staging environment before deploying to production.

Can I format HTML with inline CSS and JavaScript?

Yes! This formatter handles HTML documents that contain:

- Inline CSS in <style> tags
- Inline JavaScript in <script> tags
- Style attributes on HTML elements
- Event handler attributes (onclick, onload, etc.)
- Modern HTML5 elements and attributes

The formatter will preserve all inline code while properly formatting the HTML structure. However, note that:

- CSS and JavaScript inside tags will not be separately formatted
- For best results, use dedicated CSS and JavaScript formatters for those sections
- The formatter focuses on HTML structure, not code logic

For complex documents with lots of embedded code, consider formatting HTML, CSS, and JavaScript separately for the best results.

Is my HTML code safe and private?

Yes, your code is completely safe and private. This tool:

- Processes all HTML entirely in your browser
- Does not send any data to our servers
- Does not store or log any of your HTML
- Works offline once the page is loaded
- Does not use any external services

You can even disconnect from the internet after loading the page and the tool will still work perfectly. Your HTML code never leaves your computer. This makes it safe to format proprietary or sensitive HTML code.

What are the statistics shown?

After formatting or minifying, the tool displays useful statistics:

- Characters: Total number of characters in the output
- Lines: Total number of lines in the output
- Size: File size in bytes (B), kilobytes (KB), or megabytes (MB)

These statistics help you:
- Compare file sizes before and after minification
- Estimate page load impact
- Monitor HTML document complexity
- Optimize code delivery
- Make decisions about further optimization

For example, you might see a 50% reduction in file size when minifying formatted HTML, which directly translates to faster page load times for your users.

Key Features

• Format HTML with customizable indentation (2, 4, 8 spaces, or tabs)
• Minify HTML to reduce file size for production
• Wrap attributes option for better readability
• Syntax highlighting for tags, attributes, and values
• Real-time statistics (characters, lines, size)
• Copy formatted HTML to clipboard
• Download formatted HTML as .html file
• Upload HTML files for formatting
• Dark mode support
• No file size limits
• 100% client-side processing - your code never leaves your browser
• Works offline after initial load
• Mobile-friendly responsive design
• Preserves inline CSS and JavaScript