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Guide

How to use this tool, examples, and related tips.

How to Use the HTML Formatter

Paste your minified or poorly indented HTML into the input field.

The tool parses the markup and re-outputs it with structured indentation and line breaks that reflect the element hierarchy.

Copy the formatted HTML for review, debugging, or documentation.

What Is HTML Formatting?

HTML formatting — also called HTML pretty-printing or HTML beautifying — parses an HTML document or fragment and re-serializes it with consistent indentation that makes the nesting structure visually clear. Minified or machine-generated HTML is valid but unreadable. Formatted HTML preserves the document exactly while presenting it in a way that lets you scan the structure, spot mismatched tags, and understand nesting at a glance. Formatting does not alter the document's content, attributes, or rendering behavior.

When to Use This Tool

Debugging HTML templates — Format minified or generated HTML templates to inspect their structure and identify rendering issues.

Reading third-party markup — Format HTML copied from external sources, browser dev tools, or API responses to understand its structure before working with it.

Code review and documentation — Format HTML snippets before including them in tickets, pull requests, or technical documentation.

Cleaning up inconsistently indented markup — Standardize indentation across HTML files with inconsistent or missing formatting.

Related Tools

  • HTML minifier
  • HTML validator
  • HTML stripper
  • CSS beautifier
  • XML formatter

FAQ

Answers about this tool and how your data is handled.

Does formatting change the HTML content or rendering?

No. Only whitespace between elements is affected. Text content, attributes, and document structure are preserved. Note that in some edge cases, adding whitespace between inline elements can introduce minor visual spacing differences.

What if my HTML is invalid?

The formatter uses a lenient parser and will attempt to format even malformed HTML. For strict validation, use the HTML validator first.

Does this handle HTML fragments as well as full documents?

Yes. You can format a complete HTML document or an individual snippet — a <div> block, a table, a form — without needing the full <!DOCTYPE html> wrapper.

Does this tool send my data to a server?

No. Formatting runs entirely in your browser. Nothing is uploaded.

Can I control the indentation size?

Check the tool's settings for indentation options — typically 2-space, 4-space, or tab.

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