Question 1

What is XML?

Accepted Answer

XML (eXtensible Markup Language) is a markup language for encoding documents in a format that is both human-readable and machine-readable. It's used for data exchange, configuration files, and document storage.

Question 2

What makes XML valid?

Accepted Answer

Valid XML must have a single root element, properly nested and closed tags, quoted attribute values, and case-sensitive matching tags. The validator checks all these rules.

Question 3

What's the difference between XML and HTML?

Accepted Answer

XML is strict about syntax (all tags must close, attributes must be quoted), while HTML is more forgiving. XML is for data, HTML is for display. Check our HTML Validator for HTML files.

Question 4

Is my data secure?

Accepted Answer

Yes, all validation happens locally in your browser. Your XML data never leaves your device.

XML

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Frequently Asked Questions