HTML オンラインフォーマッター

What Is HTML Formatter?

HTML Formatter is a free online tool that cleans up and restructures HTML markup. In Beautify mode it adds consistent indentation and line breaks so your HTML is easy to read and maintain. In Minify mode it strips all unnecessary whitespace and comments to produce compact HTML ready for production deployment.

How to Use HTML Formatter

1. Choose Beautify to format HTML with indentation, or Minify to compress it.
2. Paste your HTML into the input panel, or click Load Sample to try an example.
3. The formatted output appears instantly in the right panel.
4. Click Copy to copy the result to clipboard.

Features

• Beautify mode with 2-space or 4-space indentation
• Minify mode strips whitespace and HTML comments
• Handles void elements and inline tags correctly
• Copy result to clipboard
• Runs entirely in your browser — zero data uploaded

FAQ

What is HTML Formatter?

HTML Formatter is a free online tool that either beautifies HTML with consistent indentation or minifies it by stripping whitespace and comments to reduce file size.

What is the difference between beautify and minify?

Beautify adds proper indentation and line breaks to make HTML readable. Minify removes all unnecessary whitespace and comments to produce the smallest possible output for production use.

Is my HTML data sent to a server?

No. All formatting happens entirely in your browser. Your data never leaves your device.