XSD to JSON Converter
ConvertConvert XSD to JSON — generates a sample JSON object from your schema, types and enumerations included.
Generate sample JSON from an XSD schema
When you work with enterprise systems — banks, insurers, government agencies, hospital networks — you often receive an XSD schema as the specification for an integration. Before writing any code, you want to see what the data actually looks like. This tool reads the XSD and generates a concrete JSON sample: every element appears as a key, every type is resolved to a realistic placeholder value.
The generated JSON is not just illustrative — it reflects the actual nesting and cardinality of the schema. xs:element with maxOccurs="unbounded" becomes a JSON array; xs:enumeration values use the first defined option rather than a generic string; xs:boolean becomes true rather than "true".
Common scenarios
ISO 20022 / SWIFT MX: receive a pacs.008 or pain.001 XSD from a bank; generate JSON to understand the payment message structure before building a mapping layer.
HL7 / FHIR XML: take an HL7 v3 CDA schema and generate JSON to plan your FHIR mapping.
PEPPOL / UBL: inspect an e-invoice schema (UBL 2.1) as JSON to plan your ERP integration.
WSDL / SOAP: extract the embedded XSD types and generate JSON payloads for REST equivalents.
Everything in the XSD to JSON Converter
Convert an XSD schema to JSON online: get a sample JSON object with type-correct values from xs:element, xs:complexType and xs:enumeration. Free, client-side.
Type mapping
Maps xs:string, xs:integer, xs:decimal, xs:boolean, xs:date, xs:dateTime to proper JSON values.
Enumeration support
xs:restriction with xs:enumeration uses the first defined value as the JSON sample.
Named types
Resolves top-level xs:complexType references used in xs:element type attributes.
Instant preview
JSON output updates as you edit the XSD — no submit button needed.
Frequently asked questions
It reads your XSD schema and generates a sample JSON object that conforms to the schema's structure. Each xs:element becomes a JSON key, and the type (xs:integer, xs:boolean, xs:date, etc.) determines the sample value. The result helps you understand the data model and build JSON payloads for testing.
The most common case is migrating from XML/SOAP APIs to REST/JSON APIs. The XSD defines the old message format; converting it to JSON gives you a concrete target structure for the new API. It's also useful for generating test fixtures when you only have a schema and no sample data.
Yes. When a type is defined with xs:restriction and xs:enumeration, the converter uses the first listed value as the JSON sample rather than a generic placeholder.
The converter handles xs:simpleContent with xs:extension (for elements that have both text and attributes), emitting a {value, attr} shaped object. Deep inheritance chains and abstract types are outside scope — the tool is designed for the common patterns found in enterprise XSD files.
No. Every operation runs entirely in your browser using client-side JavaScript. Your input is never uploaded, logged, or stored on any server — it never leaves your device.
Yes, completely free with no sign-up required. There are no usage limits, no watermarks, and no premium gate on any feature.
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