HTML Formatter
HTML Input
Paste HTML and use Format, Minify, or Validate buttons
Settings
Paste HTML and click Format or Minify
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4.9 (2.8k ratings)
About HTML Formatter
Format, beautify, and minify HTML code online. Free HTML formatter and validator tool.
How to Use
Step 1
Paste your HTML into the input field
Step 2
Load examples to see different HTML structures (basic, unformatted, form, table, semantic)
Step 3
Click 'Validate HTML' to check for syntax errors and warnings
Step 4
Configure settings: indent size, remove comments, remove empty lines
Step 5
Click 'Format HTML' to beautify with proper indentation
Step 6
Click 'Minify HTML' to remove whitespace and reduce file size
Step 7
View statistics: characters, lines, tags, attributes
Step 8
Copy the formatted/minified HTML to use in your project
Features & Benefits
- ✅Format HTML with proper indentation and structure
- ✅Minify HTML to remove whitespace and reduce file size
- ✅Validate HTML syntax with detailed error messages
- ✅Detect unclosed tags and mismatched tags
- ✅Show warnings for common issues
- ✅Configurable indent size (2, 4, or 8 spaces)
- ✅Remove HTML comments option
- ✅Remove empty lines option
- ✅Smart formatting: preserves inline tags, formats block tags
- ✅Handles self-closing tags correctly
- ✅5 HTML examples: basic, unformatted, form, table, semantic
- ✅Statistics: character count, line count, tag count, attribute count
- ✅One-click copy to clipboard
- ✅Real-time validation with error and warning lists
- ✅100% browser-based - HTML never sent to server
- ✅100% free - no limits, no signup required
FAQs
What's the difference between Format and Minify?
Format adds proper indentation and line breaks to make HTML human-readable and easier to edit. Minify removes all unnecessary whitespace, comments, and line breaks to reduce file size for production use. Use Format for development, Minify for deployment.
How does HTML validation work?
The validator checks for common HTML errors: unclosed tags (missing closing tags), mismatched tags (wrong closing tag order), unexpected closing tags, and syntax issues like spaces in wrong places. It shows both errors (must fix) and warnings (should review).
Should I remove comments?
For production code, yes - removing comments reduces file size and prevents exposing internal notes to users. For development, keep comments for documentation. The formatter lets you choose based on your needs.
What indent size should I use?
2 spaces is most common in web development and keeps files compact. 4 spaces is popular in some style guides and improves readability. 8 spaces is rarely used. Choose based on your team's coding standards or personal preference.
Can this fix broken HTML?
The formatter can beautify structure and the validator can identify errors, but it won't automatically fix broken HTML. Use the validation errors to identify issues, then manually correct them. This ensures you understand and control the fixes.
What are inline vs block tags?
Block tags (div, p, h1, section, etc.) create new lines and get indented. Inline tags (a, span, strong, em, etc.) stay on the same line as their content. The formatter handles both correctly, preserving inline tags while formatting block structure.
How much smaller is minified HTML?
Minification typically reduces HTML file size by 10-30%, depending on how much whitespace and comments your original HTML contains. More indentation and comments = more savings. Every byte saved improves page load speed.
What are self-closing tags?
Self-closing tags don't need a closing tag: br, hr, img, input, link, meta, etc. The formatter recognizes these and doesn't expect closing tags. For example, <br> and <br /> are both valid and handled correctly.
Can I use this for HTML templates?
Absolutely! This tool works with any HTML, including templates with template syntax (Handlebars, EJS, etc.). However, validation might show errors for template-specific syntax. Use Format to clean up structure, but be aware of template-specific tags.
What are the HTML examples for?
Click 'Examples' to load pre-made HTML samples: Basic (simple page structure), Unformatted (messy HTML to practice formatting), Form (input elements), Table (data table), and Semantic (HTML5 semantic tags). Great for testing the formatter.
Is my HTML data secure?
Yes! All HTML processing happens entirely in your browser using JavaScript. Your HTML code never leaves your device and is not sent to any server, ensuring complete privacy and security.