Convert XSD to JSON Schema in your browser, instantly
Paste or upload an XML Schema (XSD) file and get a clean, valid JSON Schema back in real time. Every element, attribute, restriction and nested type is parsed on your device — nothing is uploaded, nothing is simulated.
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XSD to JSON Schema Converter
// Your generated JSON Schema will appear here
Built for real-world XML Schemas
Not a toy demo — this engine walks the actual XSD element tree in your browser to produce accurate, usable JSON Schema output.
Nested complexType support
Recursively resolves named and inline xs:complexType definitions, including xs:sequence, xs:all and xs:choice groupings.
Restriction-aware types
Maps enumeration, pattern, minLength, maxLength, minInclusive and maxInclusive from xs:simpleType restrictions to JSON Schema keywords.
Required field detection
Reads minOccurs and use="required" to correctly populate the JSON Schema "required" array for elements and attributes.
Array & repeatable elements
Elements with maxOccurs greater than 1 or "unbounded" are converted into JSON Schema array types with minItems and maxItems.
Real-time validation
A live listener checks your XSD as you type or paste, flagging malformed XML before you even click convert.
Copy, download or clear
Grab the result as a formatted .json file, copy it to your clipboard, or reset the workspace in a single click.
How the XSD to JSON conversion works
Four steps, entirely inside your browser tab.
Provide your XSD
Paste XML Schema markup directly or upload a .xsd file from your computer.
Parse the schema tree
The tool builds a DOM tree and indexes every named complexType and simpleType for reuse.
Map types & constraints
Each XSD element, attribute and restriction is translated to its closest JSON Schema keyword.
Review, copy or download
Inspect the formatted JSON Schema, copy it, or download it as a ready-to-use .json file.
XSD for JSON: converting XML Schema to JSON Schema
Teams that grew up on XML often reach a point where a new API, mobile client, or internal service expects JSON instead. The data itself usually doesn't change much — the same product records, invoices, or configuration objects still need the same validation rules — but the schema language does. That's the gap this XSD for JSON tool closes: it reads an existing XSD (XML Schema Definition) file and produces a working JSON Schema document that carries over the structure, data types, and constraints you already defined.
What is XSD to JSON Schema conversion?
An XSD describes what a valid XML document is allowed to look like: which elements can appear, in what order, how many times, and what data type each one holds. JSON Schema does the same job for JSON documents. Converting XSD to JSON Schema means walking through every xs:element, xs:complexType, xs:attribute and xs:simpleType restriction in the source file and re-expressing it using JSON Schema's own vocabulary — type, properties, required, enum, pattern, minimum, maximum, and so on. Done correctly, the resulting JSON Schema enforces the same rules the original XML Schema to JSON Schema mapping intended, just against JSON payloads instead of XML documents.
How to convert XSD to JSON automatically
Manually rewriting a large XSD by hand is slow and error-prone, especially once nested complex types, choice groups, and inherited base types get involved. This converter automates that work: it parses your XSD in the browser, resolves every referenced type, and builds the equivalent JSON Schema tree without sending your file anywhere. That matters if your schema describes an internal API, a regulated data format, or anything you'd rather not paste into a third-party backend. The output is a standard draft-07 JSON Schema document, so it drops straight into common JSON Schema validators, API documentation tools, and code generators.
Typical use cases for XSD to JSON Schema
Developers reach for XSD to JSON Schema conversion when migrating a SOAP-based service to a REST or GraphQL API, when generating JSON validation rules from an existing enterprise data dictionary, or when a partner sends an XSD contract that a JSON-first team needs to validate against. It's also useful for documentation: a JSON Schema is easier to render in interactive API docs than raw XSD markup, and many form-generation and mock-data libraries read JSON Schema natively.
Why accuracy matters
A conversion tool is only useful if the output actually reflects the source schema's intent. That's why this tool avoids shortcuts: required fields come from real minOccurs and use="required" attributes, arrays come from real maxOccurs values, and enumerations, patterns and numeric bounds come from real xs:restriction facets — not guesses or placeholder values. If you're building a validation layer, generating sample JSON, or documenting an API contract, that fidelity is the difference between a schema you can trust and one you have to double-check by hand.
Frequently asked questions
Paste your XSD (XML Schema Definition) markup into the input panel, or upload an .xsd file. The tool parses the schema in your browser and generates a matching JSON Schema document instantly, with no upload to a server.
Yes. Nested xs:complexType structures, xs:sequence, xs:choice, xs:attribute, and simpleType restrictions such as enumeration, pattern, minLength and maxLength are mapped to their closest JSON Schema equivalents.
No. The XSD to JSON conversion runs entirely client-side in your browser using JavaScript. Your schema content never leaves your device, which makes it safe for internal or proprietary XML Schema definitions.
XSD describes the structure and data types of XML documents, while JSON Schema describes the structure and data types of JSON documents. This tool maps XSD elements, types and constraints to their JSON Schema equivalents so the same validation rules can apply to JSON payloads.
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