Developer Tool Developer Tool

HTML Formatter

Beautify, minify, and validate HTML while preserving raw code and whitespace-sensitive blocks.

✓Beautify + minify ✓Structure validation ✓Raw blocks preserved

IndentAuto Format

HTML Input

Paste an HTML document or fragment

Formatted Output

Ready to copy or download

<!doctype html>
<html>
  <head>
    <title>
      ToolNest
    </title>
  </head>
  <body>
    <main>
      <h1>
        Developer Tools
      </h1>
      <p>
        Format your HTML instantly.
      </p>
      <pre>  preserved spacing\n  stays here</pre>
    </main>
  </body>
</html>

HTML formatted successfully.

HTML Ready

How to Use

Paste HTML, choose indentation, then beautify, minify, or validate. Review structural warnings before copying or downloading.

Preserved Blocks

<pre>

<code>

<style>

Readable markup is easier to maintain

Consistent indentation exposes nesting mistakes and makes templates easier to review. Minification safely removes inter-tag whitespace and ordinary comments while leaving whitespace-sensitive and executable blocks intact.

Frequently Asked Questions

Does formatting execute scripts? +

No. HTML is processed as text and scripts are never executed by the formatter.

Is preformatted content changed? +

No. Pre, code, script, style, and textarea blocks are protected during formatting and minification.

Does minification remove comments? +

Ordinary comments are removed, while conditional comments are retained.

Is this a complete HTML standards validator? +

It reports parser-level structural issues; use the W3C validator for exhaustive standards and accessibility checks.

Semantic HTML Choose meaningful elements HTML Performance Reduce document overhead Accessible Markup Build inclusive interfaces

Developer newsletter

Stay Ahead

Get practical developer guides, new tools, and workflow improvements without inbox noise.