Format HTML for Clean, Maintainable Web Templates

Copy-pasting HTML from email builders, CMS exports, or minified production code results in an unreadable mess. Proper indentation reveals the DOM hierarchy at a glance, making templates easier to debug, review, and maintain.

What Is HTML Formatter?

HTML formatting restructures markup with consistent indentation, proper nesting visibility, and line breaks between elements. Our HTML Formatter handles inline styles, embedded scripts, and self-closing tags correctly.

How to Use HTML Formatter on DevToolHub

1. Open the HTML Formatter tool on DevToolHub — no signup required.
2. Paste or enter your input data in the left panel.
3. See the result instantly in the output panel.
4. Copy the result or download it as a file.

Cleaning Up CMS-Generated HTML

Content management systems often produce dense, hard-to-read markup:

<!-- Before -->
<div class="wrapper"><div class="header"><h1>Title</h1><p>Subtitle</p></div><div class="content"><ul><li>Item 1</li><li>Item 2</li></ul></div></div>

<!-- After -->
<div class="wrapper">
  <div class="header">
    <h1>Title</h1>
    <p>Subtitle</p>
  </div>
  <div class="content">
    <ul>
      <li>Item 1</li>
      <li>Item 2</li>
    </ul>
  </div>
</div>

Pro Tips

• Use 2-space indentation for HTML — it matches industry conventions and saves horizontal space
• Format HTML before checking for accessibility issues — proper nesting makes ARIA relationships visible
• Inline elements (span, a, strong) can stay on the same line as their parent text
• Set up auto-format on save in your IDE to maintain consistent style

When You Need This

• Cleaning up HTML from email template builders
• Making CMS-exported HTML readable for editing
• Debugging layout issues by visualizing nesting hierarchy
• Preparing HTML snippets for documentation and tutorials