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Validate XML Against XSD

Paste your XML and XSD to validate client‑side (no uploads). This tool supports a practical subset of XSD: xs:element, xs:complexType, xs:sequence, xs:attribute, minOccurs/maxOccurs, and basic simple types (string/int/decimal/boolean/date/dateTime) plus enumerations.

Category: Data · URL: /tools/tool-validate-xml-against-xsd.html
Privacy: runs locally in your browser. No uploads, no tracking scripts.

How to use

Use it in seconds:

  1. Paste XML into the XML box.
  2. Paste your schema into the XSD box.
  3. Choose options (strict order / allow extra elements).
  4. Click Validate to see PASS/FAIL and details.

Note: This is a lightweight browser validator for common XSD patterns, not a full XSD 1.0/1.1 engine.

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Secondary intents covered: Validate an XML document before importing into another system, Find where XML fails XSD rules (missing element, wrong order, wrong type), Check required attributes and simple type constraints (int/boolean/date), Verify minOccurs/maxOccurs counts for repeated elements, Confirm that XML is well‑formed (parsing) before schema checks, Test quick changes to an XSD against sample XML examples, Share/copy a compact validation result for debugging tickets, Run validation locally in the browser for privacy

FAQ

Does this tool upload my XML or XSD?

No. Validation runs locally in your browser; the tool does not send your content over the network.

Is this a full XSD 1.0/1.1 validator?

No. It validates a common subset (elements, sequences, min/maxOccurs, required attributes, basic simple types, and enumerations).

Why does it say the XSD has no global element for my root?

Your XSD must define a top-level xs:element matching the XML root name (for example <xs:element name="root">).

Does it validate namespaces?

It compares element names using localName (ignores prefixes). If your schema relies on namespace-qualified matching, use a full validator.

What types are checked?

Basic types are supported: string, int/integer, decimal, boolean, date (YYYY-MM-DD), dateTime (ISO 8601), and enumerations.

How do I allow optional or repeated elements?

Use minOccurs and maxOccurs in your XSD element definitions; the tool checks the counts.

Why do I get “Unexpected element” errors?

By default, extra elements not listed in the schema sequence are rejected; enable “Allow extra elements” if you want to ignore unknown tags.