What is XML Validator?
XML Validator checks XML document well-formedness and tag syntax against W3C standards.
How to use XML Validator
Paste XML text to check tag nesting and well-formedness errors instantly.
Key features
- W3C XML well-formedness validation
- Detailed error line reporting
- 100% client-side operation
Common use cases
- Validating SOAP API XML envelopes and RSS feeds
Technical details & standards
Uses DOMParser to validate XML document nodes client-side.
Frequently asked questions
Does it validate against XSD schemas?
It validates structural well-formedness.
Is my data safe?
All processing happens entirely in your browser. Your data never leaves your device and is never sent to or stored on a server.
Does it work offline?
Yes. Once the page has loaded, most tools keep working without an internet connection.