HTML Formatter

Format, beautify, minify, and validate HTML code with this free online tool. Clean up messy HTML with proper indentation and syntax.

Request Feature / Support

7,148+

Total Calculations Run

< 15ms

Browser Execution Speed

100%

Client-Side Privacy

4.9 / 5.0

User Satisfaction

Worked Example & Common Values

Below is a sample worked calculation demonstrating how HTML Formatter processes input data instantly inside your browser.

Sample Input Minified string: {"id":1,"status":"active","roles":["admin"]}

Computed Result

{
  "id": 1,
  "status": "active",
  "roles": [
    "admin"
  ]
}

Execution Mode Client-Side In-Browser JS

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About This Tool

This HTML Formatter tool helps developers clean up and optimize HTML code. You can paste any HTML code and choose to either beautify it with proper indentation and line breaks for readability, or minify it by removing all unnecessary whitespace and comments for production use. The tool also validates basic HTML syntax and highlights errors. It's perfect for cleaning up code from WYSIWYG editors, converting messy HTML to well-formatted code, or preparing HTML for production deployment.

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How to Use

Paste your HTML code into the input textarea
Select formatting options: Beautify (with indentation) or Minify (remove whitespace)
Choose indentation size (2 or 4 spaces) if beautifying
Click 'Format HTML' button to process
View the formatted result with syntax highlighting
Use 'Copy to Clipboard' or 'Download HTML' buttons to save the result

Frequently Asked Questions

Find Quick Answers

What does this HTML Formatter do?

This tool formats HTML code by either beautifying it (adding proper indentation and line breaks for readability) or minifying it (removing all unnecessary whitespace, comments, and line breaks to reduce file size).

Does this tool validate HTML?

Yes, the tool performs basic HTML syntax validation and will highlight errors like unclosed tags or malformed attributes in the results.

Is there a file size limit?

The tool processes HTML entirely in your browser, so there's no server-side limit. However, very large HTML files (10MB+) may cause browser performance issues.

Can I format HTML with embedded JavaScript and CSS?

Yes, the tool handles HTML with embedded