XML Validator

Check whether your XML is well-formed.

An XML validator checks that your XML is well-formed, ensuring every opening tag has a matching closing tag and elements are correctly nested.

How to Use the XML Validator

  1. Paste your XML. Enter the XML to check.
  2. Review the result. See whether it is well-formed and any mismatch details.

This tool processes your input locally in your browser. Nothing is uploaded.

What Is XML Validator?

Validating XML ensures your document is well-formed before parsers consume it.

What is well-formed XML?

Well-formed XML has a single root element, properly nested tags, and a matching closing tag for every opening tag. Attributes are quoted and special characters are escaped.

Key Features

  • Tag-balance checking
  • Clear mismatch errors
  • Local processing

Examples

  • A missing closing tag produces a clear error naming the tag.

Common Use Cases

  • Checking config files
  • Debugging feeds
  • Pre-deploy validation

Tips & Best Practices

  • Remember that XML is case-sensitive; <Item> and <item> differ.

Limitations

  • This is a well-formedness check, not full DTD/schema validation.

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Frequently Asked Questions

What does XML validation check?
It checks that tags are balanced and correctly nested (well-formed).
Does it check against a schema?
No, only well-formedness.
Is it free?
Yes, and it runs locally.

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