🛡️ Client‑Side XML to XSD Schema Engine

XML to XSD – Generate W3C XML Schema Definitions

Automatically deduce element types, complexTypes, sequences, and attribute definitions from your XML files. Enforce API contracts and validate data pipelines. No uploads, 100% private.

🔒 100% Private – Schema induction executes locally in your browser memory.
📁

Drag & Drop Your XML File Here

Supports .xml, .xhtml, and .xsd files

Try a sample:

Why Generate an XSD (XML Schema Definition)?

An XSD (XML Schema Definition) formalizes the architectural contract of an XML document. In enterprise banking, B2B EDI exchanges, healthcare HL7 workflows, and SOAP microservices, incoming XML must be validated against a strict schema to prevent malformed payloads, injection vulnerabilities, and processing crashes. Writing an XSD by hand is tedious and error-prone; DataFrog inspects your sample XML to automatically infer complex types, child element sequences, cardinality rules, and W3C data types.

W3C Datatype Detection Rules

  • xs:integer – Whole positive and negative numbers without fractional decimals.
  • xs:decimal – Floating-point prices, percentages, and measurement ratios.
  • xs:boolean – Literal true and false boolean flags.
  • xs:date & xs:dateTime – Standard ISO 8601 calendar strings (e.g. 2026-09-29).
  • xs:string – General character text, descriptions, and mixed content.

Frequently Asked Questions

How does the generator distinguish complexType from simpleType?

Any XML tag that encloses child tags or declares XML attributes is defined as an xs:complexType. Tags containing exclusively scalar text values without attributes are assigned simple W3C datatypes.

How are repeated sibling elements handled in the schema?

When an element occurs multiple times within a parent container, the schema generator automatically appends maxOccurs="unbounded" to validate arrays of items.

Can the generated XSD be used in Java, .NET, or Python validators?

Yes. The output strictly conforms to the official W3C XML Schema 1.0 recommendation, compatible with Java Xerces, Microsoft .NET XmlSchemaSet, and Python lxml.

How does the schema generator detect optional vs required elements?

When sibling records are evaluated, if an element is absent from one or more records, the generator assigns minOccurs="0" to mark it as optional. Elements present in all records default to minOccurs="1".

Which W3C XML Schema versions are supported?

The generated schema adheres to the universal W3C XML Schema 1.0 (XSD 1.0) standard with xmlns:xs="http://www.w3.org/2001/XMLSchema", ensuring 100% compatibility with standard parsers like Xerces, lxml, System.Xml, and JaxB.