Online XML Formatter & Validator — Beautify, Minify, Inspect

Free online XML editor. Beautify, minify, and validate XML. Explore structure with an interactive tree view. No data uploaded.

About XML Formatter, Beautifier & Validator

4.8out of 5 · 156 ratings

This free online XML formatter, beautifier, and validator pretty-prints XML documents with consistent 2-space indentation and checks them for well-formedness. Paste minified XML from an API response or a single-line config file and get clean, human-readable output in milliseconds. The validator checks that all tags are properly opened and closed, attributes are quoted, and the document has a single root element — note that it validates well-formedness only, not compliance with a schema or DTD. Syntax errors are reported with line numbers so you can locate problems immediately, with no signup and no data uploaded.

Key Features

  • Formats XML with consistent 2-space indentation for clean, readable output
  • Validates XML well-formedness — checks tag pairing, attribute quoting, and root element
  • Does not validate against a schema or DTD — pure well-formedness check
  • Handles large XML files and deeply nested element trees
  • Copy the formatted result or download as a .xml file — no signup needed

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