What is the difference between cleaning and validating HTML?

Cleaning fixes whitespace and indentation formatting. Validating checks whether the HTML structure is correct according to the HTML specification. You need both for production-quality code.

Does the code cleaner remove comments?

No. HTML comments are preserved exactly as written. The cleaner only modifies whitespace and indentation.

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HTML Code Cleaner Online

HTML code gets messy — inconsistent indentation, mixed whitespace, formatting from different editors. FixTools cleans it all up instantly. Paste any HTML and get consistent, clean code that's easy to read, maintain, and hand off.

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Cost: Free forever
Sign-up: Not required
Processing: In your browser
Privacy: Files stay local

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Cleans all whitespace inconsistencies

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Normalises line endings

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Removes unnecessary blank lines

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HTML Formatter

All processing happens in your browser — your files are never uploaded to any server.

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How to use this tool

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Paste your HTML and click Format. The code cleaner removes inconsistent whitespace, normalises indentation, and produces a clean, publication-ready file.

How It Works

Step-by-step guide to html code cleaner online:

1
Paste your HTML
Paste the HTML you want to clean into the input panel.
2
Click Format
Click Format to clean all formatting inconsistencies.
3
Review the clean output
Confirm the cleaned HTML looks correct.
4
Copy and commit
Copy the clean HTML and use it in your project or commit it to version control.

Real-world examples

Common situations where this approach makes a real difference:

Pre-commit HTML cleanup in a CI workflow

Run HTML through the code cleaner before committing to a shared repository to prevent whitespace diffs that make code reviews harder to read.

Cleaning HTML assembled from multiple component snippets

A page assembled by combining snippets from different sources has inconsistent indentation throughout. A single pass through the code cleaner normalises it all.

When to use this guide

Use this as a final cleanup step before committing HTML, publishing content, or handing code to another developer.

Pro tips

Get better results with these expert suggestions:

Run the code cleaner before every commit

Make it a habit to clean your HTML before every commit. This keeps diffs clean and prevents whitespace-only changes from polluting your git history.

Clean after copying from multiple sources

HTML assembled from multiple sources (snippets, templates, copy-paste) accumulates mixed indentation. Clean it as a single step after assembly.

Pair with the HTML Validator

After cleaning formatting, validate the HTML. The cleaner handles presentation; the validator handles structure. Both are needed for production-quality HTML.