ValidateThis

XSD Schema Checker

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Validators and utilities that complement XSD Schema Checker — same session, no sign-up.

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Validate XML against an XSD schema. Paste XSD and XML; get line and column errors when the document does not conform.

About this tool

Checks that your XML instance conforms to a W3C XML Schema (XSD). Paste the XSD in the first editor and the XML in the second. Uses libxml2 for validation. Use the API for automation.

For well-formed XML only (no schema): XML Validator.

How to use this tool

  1. Paste your sample in the input (or fetch from URL if this tool supports it).
  2. Run the main action on the page to execute XSD Schema Checker.
  3. Read the result, fix the source data or config, and re-run if needed.

What this check helps you catch

  • Validate XML against an XSD schema. Paste XSD and XML; get line and column errors when the document does not conform.
  • Limits called out in the description (what this tool does not verify — e.g. live network reachability, issuer databases, or strict schema contracts unless stated).
  • Structural or syntax mistakes that would break parsers, serializers, or the next step in your workflow.

FAQ

What does XSD Schema Checker do?
Validate XML against an XSD schema. Paste XSD and XML; get line and column errors when the document does not conform. Use the form above, then see “How to use” and “What this check helps you catch” for behavior detail.
Is this a substitute for server-side validation?
No. Use it for manual checks and triage; production systems should still validate and authorize on the server.
Where does processing happen?
Most validators here run in your browser. If a tool calls an API, that is stated on the page. See the site privacy policy for data handling.