HTML Formatter

Format and beautify raw HTML documents with proper indentation and nesting structure.

100% Client-Side Local Execution

Upload Data

1

<!DOCTYPE html><html><head><title>Test</title></head><body><div class="container"><h1>Hello World</h1><p>Welcome to WarpTool.</p></div></body></html>

<!DOCTYPE html><html><head><title>Test</title></head><body><div class="container"><h1>Hello World</h1><p>Welcome to WarpTool.</p></div></body></html>

<!DOCTYPE html>
<html>
  <head>
    <title>Test</title>
  </head>
  <body>
    <div class="container">
      <h1>Hello World</h1>
      <p>Welcome to WarpTool.</p>
    </div>
  </body>
</html>

<!DOCTYPE html>
<html>
  <head>
    <title>Test</title>
  </head>
  <body>
    <div class="container">
      <h1>Hello World</h1>
      <p>Welcome to WarpTool.</p>
    </div>
  </body>
</html>

What is HTML Formatter?

The HTML formatter takes minified, compressed, or messily indented HTML and reformats it into clean, properly nested markup with consistent indentation. It's the standard html formatter developers use to make view-source output, scraped markup, or a build tool's minified output readable again. Handles void elements, inline tags, and attribute wrapping sensibly.

Technical Execution

The tool parses the HTML using an HTML-aware parser that understands the tag nesting rules of the HTML spec (including which elements are void, like <br> or <img>, and which can be implicitly closed), then re-serializes the resulting tree with consistent per-level indentation.

Zero Data Storage Guarantee

Formatting happens entirely in your browser — the markup you're cleaning up, which might include embedded tracking scripts, form action URLs, or internal page structure, is never uploaded to a server.

How to Use HTML Formatter (Step-by-Step Guide)

Paste your minified or poorly indented HTML into the input panel
The cleanly indented, nested markup appears automatically
Review the structure to confirm tags are nested as expected
Copy the formatted HTML to your clipboard
Download the result as an .html file if needed

Frequently Asked Questions (FAQ)

Q: Is HTML formatter the same as HTML beautifier?

A: Yes, both describe the same reindentation process for markup; we use both terms since developers search for either.

Q: Does it fix broken or unclosed tags?

A: The parser applies standard HTML error-recovery rules (the same ones browsers use), so some unclosed tags get implicitly closed, but it won't fix deeper structural mistakes like mismatched opening/closing tag types.

Q: Can I format HTML online without a code editor?

A: Yes, that's exactly what this page is for, no extension or install needed.

Q: Does it preserve inline JavaScript and CSS inside the HTML?

A: Yes, content inside <script> and <style> tags is preserved; formatting focuses on the HTML tag structure around them.

Q: Will formatting change how the page renders?

A: No, reformatting only changes whitespace and indentation in the source; it doesn't alter the DOM structure or rendered appearance.

Q: Is there a size limit for formatting HTML pages?

A: No hard limit, though very large HTML documents (hundreds of KB or more) may take a moment longer given parsing happens in-browser.

Q: Does it handle self-closing void elements correctly?

A: Yes, elements like <br>, <img>, <input>, and <hr> are handled according to the HTML spec's void element rules.

Q: Can I use this to clean up HTML copied from a CMS?

A: Yes, that's a common use case — CMS or page-builder output is often inconsistently indented, and this normalizes it.

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