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HTML Formatter

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

Beautify + minifyStructure validationRaw blocks preserved

HTML Input

Paste an HTML document or fragment

Formatted Output

Ready to copy or download

<!doctype html>
<html>
  <head>
    <title>
      SmartToolsNest
    </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

Preserved Blocks

<pre>
<code>
<script>
<style>
<textarea>

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.

What is HTML Formatter?

HTML Formatter restructures untidy markup with consistent indentation so nested elements, attributes, and closing tags are easier to inspect. Front-end developers, email builders, and students can also minify completed markup or identify basic structural problems without running the document.

How to use HTML Formatter

  1. 1.Paste an HTML document or fragment into the input editor.
  2. 2.Choose the indentation width and whether the output should be beautified, minified, or checked.
  3. 3.Run the formatter and review warnings about unbalanced or suspicious markup.
  4. 4.Inspect protected preformatted blocks, then copy or download the resulting HTML.

Key features

  • ✓Indentation follows the nesting depth of ordinary HTML elements.
  • ✓Protected pre, code, script, style, and textarea content is not reformatted internally.
  • ✓Minification removes dispensable whitespace and ordinary comments while retaining conditional comments.
  • ✓Text-only processing prevents scripts from executing inside the formatting workflow.
  • ✓Copy and download controls make the cleaned document ready for an editor or build pipeline.

Common use cases

  • Make a compressed page source readable while debugging a layout.
  • Standardize a hand-written email template before peer review.
  • Minify a static HTML fragment before embedding it in a test fixture.
  • Spot an unclosed container in markup copied from a CMS editor.

Frequently asked questions

Does the HTML formatter execute JavaScript?

No. The input is handled as text; script content is protected rather than executed.

Will formatting change text inside pre or code elements?

Preformatted and code-like blocks are preserved internally so meaningful spaces and line breaks are not rewritten.

Can this tool fully validate HTML5?

It can report useful parser-level structural issues, but conformance, accessibility, and browser behavior should also be checked with dedicated validators and real browsers.

What is the difference between formatting and minifying HTML?

Formatting adds readable indentation and line breaks. Minification removes unnecessary spacing and comments to produce a smaller document.

Can I format an HTML fragment without head and body tags?

Yes. Fragments can be cleaned independently, although document-level validation naturally requires a complete document.

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