This formatter focuses on readable structure. It places nested elements at the right depth while keeping attributes, comments, declarations and text content visible. It does not remove comments or compress bytes, so it stays separate from an HTML minifier. Your markup is processed locally and is never uploaded.
Free HTML Formatter
Runs entirely in your browser - no upload, no sign-up.
HTML
Formatted HTML
Paste HTML to format it
What does an HTML formatter do?
An HTML formatter turns compressed or uneven markup into readable, consistently indented HTML. Paste a document or fragment, choose two spaces, four spaces or tabs, and copy the result. The formatter understands HTML5 void elements, common optional closing tags and raw script or style content, all inside your browser.
How to use
- 1Paste HTML. Add a full HTML document, template or fragment to the input editor, or load the example.
- 2Choose indentation. Select two spaces, four spaces or tabs. The formatted output updates live.
- 3Check the structure. Review the element, attribute and depth counts, then scan the indented result.
- 4Copy the result. Copy the formatted HTML and paste it into your editor, CMS or code review.
Who it's for
- Frontend developers cleaning a compact template before debugging a nesting problem or reviewing a diff.
- Email developers making exported newsletter markup easier to scan without sending private campaign HTML to a server.
- CMS editors untangling a copied component or page fragment before changing classes, links or content.
- Students seeing the parent and child structure of a real HTML document through consistent indentation.
FAQ
Is this HTML formatter free?
Yes. The HTML formatter is free to use, with no sign-up, download or usage limit. Paste an HTML document or fragment, choose an indent style and copy the formatted result directly from your browser.
Is my HTML uploaded anywhere?
No. Formatting happens locally in your browser. The HTML you paste is not sent to a server, which makes the tool suitable for internal templates, unpublished landing pages, email markup and snippets that contain private URLs or identifiers.
How much HTML can I format?
There is no fixed server-side limit because nothing is uploaded. Very large documents depend on your browser and device memory, but normal pages, components, email templates and copied source fragments should format instantly.
Does the formatter handle tags without closing tags?
Yes. It recognizes HTML5 void elements such as img, br, input, meta and link, which never need closing tags. It also handles common optional end tags for list items, paragraphs, options and table rows or cells when working out the correct indentation.
Will script and style content be changed?
The formatter treats script and style bodies as raw text, so comparison operators, CSS selectors and strings containing less-than signs are not mistaken for HTML tags. It adjusts the block indentation but does not try to rewrite the JavaScript or CSS itself.
Does this tool validate or repair invalid HTML?
No. It is a formatter, not a standards validator or automatic repair service. It reports clearly unclosed comments, declarations, tags and raw-text elements, while tolerating the optional closing tags allowed by HTML. Use the Nu HTML Checker when you need conformance validation.
What is the difference between an HTML formatter and minifier?
A formatter adds line breaks and indentation so people can read and edit markup. A minifier removes optional whitespace and may remove comments to reduce transfer size. This page formats HTML only and intentionally keeps formatting and comments visible.