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XML Formatter

Format and validate XML documents

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XML Formatter reformats XML by tracking which tags are opening, closing, or self-closing, and indenting each line according to its nesting depth — turning a single dense line into a readable, properly nested document.

Paste your XML here

How to use XML Formatter

  1. 1

    Paste your XML.

  2. 2

    Click "Format" to reformat it.

  3. 3

    Review the indented, nested output.

  4. 4

    Copy the formatted XML.

Everything you need to know about formatting XML

What does this do?

Reindents minified or single-line XML with proper nesting and line breaks, and validates that it's well-formed — flagging unclosed tags or structural errors that are hard to spot in unformatted markup.

When you actually need this

  • Reading a config file or API response delivered as compressed, single-line XML.
  • Debugging a malformed XML document before it's parsed by code that will fail on invalid structure.

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Frequently Asked Questions

Does this validate that my XML is well-formed?

It reformats based on recognizing opening, closing and self-closing tags, but it doesn't perform full schema or DTD validation — badly malformed XML may format oddly rather than throwing a specific error.

Does this handle self-closing tags and XML declarations correctly?

Yes — tags like <tag/> and the <?xml ...?> declaration are recognized as self-closing and don't trigger an indent increase for following lines.

Will this work on XHTML or other XML-based formats?

Yes — the same tag-tracking logic applies to any well-formed XML-style markup, including XHTML.

Does this tool send my XML to a server?

Yes — it's sent to our servers to format and the result is returned to you; nothing is stored.

Is this tool free to use?

Yes — completely free, with no signup and no usage limits for casual use.