HTML Formatter
Format HTML tags, indentation, and line breaks to make minified or messy code easier to read.
What is an HTML formatter?
An HTML formatter reorganizes tags, indentation, line breaks, and comments. It turns one-line minified markup or messy webpage source into a more readable structure. Choose two spaces, four spaces, or tabs, protect raw pre, textarea, style, and script blocks, then copy or download the formatted HTML file.
How to format HTML online
- Paste minified or messy HTML into the input, or load the example to see the output first.
- Choose the indentation unit and decide whether to protect raw pre, textarea, style, and script blocks.
- Click Format HTML to create indented, line-separated code; Ctrl + Enter also runs formatting.
- Copy or download the result, or put it back into the input for another pass.
Key benefits of the HTML formatter
Improve hierarchy readability
Consistent indentation and line breaks make parent-child relationships in html, head, body, lists, tables, and components easier to inspect.
Protect important raw content
With protection enabled, content inside pre, textarea, style, and script is not split by ordinary tag rules, which suits code samples, CSS, and scripts.
Local processing and easy export
Formatting runs in the current browser without an upload service, and the result can be copied or downloaded as formatted.html.
Useful for review and debugging
Formatted source makes missing closing tags, repeated nesting, wrong hierarchy, and long unreadable lines easier to locate. It helps reading and cleanup but does not replace a formal HTML validator.
HTML formatter frequently asked questions
Will formatting change HTML behavior?
The tool mainly adds indentation and line breaks without intentionally changing tag names or attribute values. Whitespace can matter for inline elements, pre text, or template syntax, so test and review the diff before publishing when exact spaces matter.
Why protect style and script blocks?
These areas often contain CSS, JavaScript, or code samples with angle brackets and special formatting. Protection keeps the whole region intact so the formatter does not mistake inner text for HTML tags. Disable it only when you intentionally want another formatter to process the inner code.
Does the formatter repair invalid tags?
No. It mainly lays out markup according to tag boundaries and nesting. It does not add missing tags, rewrite invalid attributes, or perform browser error recovery. Use an HTML validator or fix the source manually, then format again.
Recommended utilities
You may also need these file utilities
HTML Minifier
Remove unnecessary spaces, line breaks, and comments from HTML to create compact webpage code.
Online HTML Editor
Edit HTML code with live preview, find and replace, copying, and download features.
HTML Validator
Check HTML tag closing and nesting, and locate common structural problems.