XML Validate
Check well-formedness in the browser, or opt in to temporary server-side XSD validation.
All processing on this page runs locally in your browser unless noted otherwise.
Ctrl/⌘ + Enter to run
XML document
How to use
- Paste XML (and XSD if using schema mode).
- Choose Well-formed (local) or XSD Schema (server), then Validate.
- Fix reported errors and re-validate.
FAQ
Is XSD validation local?
No. XSD uses the server (libxml). You must confirm before upload. Well-formed mode stays local.
Does well-formed validation upload my file?
No. Local mode never uploads.
What if the backend is down?
Well-formed mode still works. XSD mode shows a backend unavailable message.