Does formatting change how the page looks?

No, formatting only changes the code structure. The rendered webpage looks exactly the same—only the source code becomes more readable.

What indentation style is used?

Our formatter uses 2-space indentation by default, which is the most common convention for HTML. Nested elements are properly indented.

Can it handle inline JavaScript and CSS?

Yes, the formatter preserves inline JavaScript and CSS while properly indenting the surrounding HTML structure.

Is my HTML code secure?

Absolutely! All formatting happens locally in your browser. Your code is never sent to any external server.

HTML Formatter – Format & Beautify HTML Online (Free Tool)

Free online HTML Formatter tool to format and beautify HTML code with proper indentation instantly. Clean up messy HTML markup, fix indentation issues, and make code easy to read. Perfect for web developers working with HTML templates and documents. All formatting happens locally.

What is HTML Formatter?

HTML Formatter prettifies minified or messy HTML with consistent indentation, attribute wrapping, and tag closure. Use it on copy-pasted output from a build pipeline, on legacy templates with mixed indentation, or on machine-generated HTML you need to review in a pull request. Formatting runs in the browser — your markup never touches a server.

Why use this tool?

No registration, account, or installation required
No API keys to manage and no rate limits to monitor
100% free with no hidden costs or daily limits
Works with very large inputs (multi-megabyte JSON, long regex patterns, big tables)
No telemetry on the tokens, payloads, or code you paste in

How to use

Paste your input into the html formatter area
Configure the options if the defaults don't match your case
Click the action button and inspect the result
Copy the output to your clipboard or download as a file

Examples

Beautify minified HTML

Paste a one-line minified document and get a properly indented version with each tag on its own line — easy to scan and diff.

Normalise mixed indentation

A template with 2-space, 4-space, and tab indentation becomes uniform with your chosen indent — removes diff noise across team members.

Auto-close unbalanced tags

Paste HTML missing a few closing tags and the formatter highlights or fixes them, depending on settings.

Common use cases

Reviewing HTML output from a static-site generator
Reformatting templates before committing to git
Cleaning up email HTML before sending to a marketing platform
Inspecting third-party widget HTML embedded on your site
Teaching HTML structure — indentation makes nesting obvious

Troubleshooting

Inline tags split across lines and broke spacing.: Inline elements (a, span, strong) preserve whitespace. Switch to "inline tags on one line" in the options or wrap text in a block element to control spacing.
Self-closing tags came out as <br></br>.: XHTML and HTML5 self-closing rules differ. Switch the dialect to HTML5 to render void elements as <br>, or XHTML for <br />.
Pre / code blocks lost their formatting.: The formatter should preserve content inside <pre> and <code>. If it doesn't, escape the content with HTML entities or wrap in .

Frequently Asked Questions

HTML formatting adds proper indentation, line breaks, and structure to HTML code, making it easier to read and maintain.

Try these related tools

CSS Formatter JSON Formatter HTML Encode/Decode SQL Formatter

Explore more Developer Tools

Discover other free, privacy-first tools in Developer Tools.

All Developer Tools Browse all tools