Does formatting change the HTML behaviour?

No. The formatter only modifies whitespace for readability. Attribute values, text content, and document structure are preserved exactly.

Can it format a full HTML document?

Yes. It handles complete documents with doctype, head, and body elements, as well as partial HTML snippets.

Does it handle inline vs. block elements correctly?

Yes. Inline elements are kept on the same line when appropriate. Block elements are placed on their own lines with correct indentation.

Best Free Online HTML Formatter

HTML generated by frameworks, template engines, CMS platforms, and email builders is frequently compressed into a single line or has inconsistent indentation that makes it unreadable. Reviewing, debugging, and editing such HTML is frustrating and error-prone. devtoolkit.sh's HTML Formatter parses any HTML and outputs it with clean, consistent indentation. It correctly handles nested elements, void elements (br, img, input, etc.), inline vs. block element formatting rules, and pre-formatted content inside code and pre elements. The formatter is non-destructive: it only changes whitespace, never altering attribute values, text content, or the document structure. This makes it safe to use on production HTML snippets, email templates, and component output that you need to inspect or modify. Processing happens entirely in your browser — paste HTML from any source and get clean output instantly. This is particularly useful when reviewing third-party widget embed codes, debugging server-side rendered HTML, or understanding the output of HTML templating systems before committing it to a codebase.

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FAQ

Does formatting change the HTML behaviour?: No. The formatter only modifies whitespace for readability. Attribute values, text content, and document structure are preserved exactly.
Can it format a full HTML document?: Yes. It handles complete documents with doctype, head, and body elements, as well as partial HTML snippets.
Does it handle inline vs. block elements correctly?: Yes. Inline elements are kept on the same line when appropriate. Block elements are placed on their own lines with correct indentation.