How to Use the XML Validator

Paste your XML into the input field.

The tool parses the document and returns either a well-formed confirmation or a precise error message with line and character position.

Fix the flagged issue and re-validate until the document is clean.

What Is XML Validation?

XML validation checks a document for well-formedness — the baseline requirement that all XML documents must meet. A well-formed XML document has a single root element, all tags are properly opened and closed, elements are correctly nested, attribute values are quoted, and reserved characters in content are properly escaped. This tool checks well-formedness using the browser's native XML parser. It does not validate against a DTD or XML Schema (XSD) — for that, you'd need a server-side validator. Well-formedness is the first thing to verify; schema validation comes after.

When to Use This Tool

Debugging XML parse errors — When an XML parser throws a vague error, paste the document here to get a precise error location.

Validating hand-written XML — Config files, SOAP payloads, and XML templates written by hand are prone to unclosed tags and quoting errors.

Checking generated XML — Verify that XML generated programmatically is well-formed before sending it to an external system.

Pre-flight checks in pipelines — Use as a quick sanity check on XML files before passing them to downstream processes.

Related Tools

• XML formatter
• XML minifier
• XML escape
• JSON validator
• HTML validator