HTML Beautifier: Format and Indent HTML Online

Paste HTML and get tidy, indented markup. It also formats inline CSS and JavaScript. Choose indent size and line width. Runs in your browser.

Paste your HTML, press Beautify and copy the neat result. Tags are indented by nesting level, long lines wrap at the width you choose, and inline style and script blocks are formatted too.

What it does

• Indents nested tags and puts block elements on their own lines.
• Formats the CSS inside style tags and the JavaScript inside script tags.
• Wraps long lines at the width you choose.
• Keeps the text inside pre and textarea exactly as written.

Example

<!DOCTYPE html>
<html><head><title>My page</title>
<!-- styles -->
<style>body{margin:0}</style></head>
<body><div class="box"><h1>Hello</h1><p>Some <b>bold</b> text.</p><ul><li>One</li><li>Two</li></ul></div></body></html>

<!DOCTYPE html>
<html>
  <head>
    <title>My page</title>
    <!-- styles -->
    <style>
      body {
        margin: 0;
      }
    </style>
  </head>
  <body>
    <div class="box">
      <h1>Hello</h1>
      <p>Some <b>bold</b> text.</p>
      <ul>
        <li>One</li>
        <li>Two</li>
      </ul>
    </div>
  </body>
</html>

Frequently asked questions

Will it change how the page looks?

It keeps whitespace that matters, such as the spaces between inline tags and the text in pre blocks. Block elements may get line breaks that browsers ignore.

Does it fix broken HTML?

No. It does not add missing closing tags. Badly broken markup can produce an error or odd indentation.

Can I format only a fragment?

Yes. A fragment like a single div works as well as a full page.

Does it format templates such as PHP or Jinja?

Not reliably. It reads plain HTML, so template tags may confuse it.

Runs in your browser. Nothing you type is sent to this site. Updated 2026-10-11.

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