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XML to Json Schema Converter

XML is a attribute-rich, namespace-aware hierarchical document format — widely used for SOAP APIs, RSS/Atom feeds, Android layouts, enterprise data exchange. Converting it to strongly-typed Json Schema structures eliminates runtime surprises and speeds up development. This tool does it in one click, entirely in your browser.

Generate JSON Schema definitions with required arrays, $defs, and format annotations for API validation.

How to use this converter

  1. Paste your XML into the left editor panel
  2. Click Generate
  3. Copy the generated Json Schema code from the right panel

No account. No upload. No tracking. Runs entirely in your browser.

Example Json Schema output

{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "type": "object",
  "properties": {
    "id": { "type": "integer" },
    "name": { "type": "string" },
    "email": { "type": "string", "format": "email" },
    "address": { "$ref": "#/$defs/Address" }
  },
  "required": ["id", "name", "address"],
  "$defs": {
    "Address": {
      "type": "object",
      "properties": {
        "city": { "type": "string" },
        "zip": { "type": "string" }
      },
      "required": ["city", "zip"]
    }
  }
}

Why automate XML-to-Json Schema conversion?

Writing Json Schema $schema / properties definitions by hand from XML is:

  • Tedious — especially for deeply nested or large XML payloads
  • Inconsistent — naming conventions drift when done manually across a team
  • Fragile — when the XML schema changes, hand-written models lag behind

JSON Schema is language-agnostic and can be used to validate data in any language via libraries like AJV (JS), jsonschema (Python), or Schematics (Java).

This converter handles all of that automatically, giving you idiomatic Json Schema code that matches your XML structure exactly.

Json Schema and XML: what you need to know

Json Schema is a declarative schema validation standard language, used for API contract validation, OpenAPI specs, and configuration validation. It uses JSON Schema draft-07 / draft-2020-12 object definitions for structured data — making it a natural fit for XML-driven applications.

What the converter generates

Output produces draft-07 compatible JSON Schema with type, properties, required, and $defs for reusable nested schemas. Optional fields are excluded from the required array.

A common gotcha

JSON Schema required is an array at the parent level — a field not listed in required is optional even if it has a defined type.

XML input characteristics

XML allows mixed content (text + child elements), namespaces, and CDATA sections — more expressive but more verbose than JSON. XML is the foundation of many enterprise integration standards including XSLT, XSD, and SOAP.

When should I use this converter?

Use this when you need a validation schema for an existing API payload — particularly for OpenAPI documentation, API gateway validation, or form library integration.

Common use cases

  • Generating validation schemas for OpenAPI 3.x / Swagger API documentation
  • Creating JSON Schema for Ajv or Zod-based runtime validation in Node.js
  • Producing draft-07 schemas for form validation in React Hook Form
  • Rapid prototyping with real XML payloads
  • Keeping Json Schema structs in sync when XML schemas evolve
  • Onboarding new team members by auto-generating the data layer
  • Validating XML contract compatibility with Json Schema type definitions
  • Generating Json Schema models from OpenAPI specs API responses
  • Creating typed DTOs for configuration validation

Frequently asked questions

Does this work for large XML payloads?

Yes. The converter is optimized for large and deeply nested XML structures, running entirely in the browser without page reloads or server round-trips.

Does this converter support eXtensible Markup Language namespaces and nested structures?

Yes. XML supports both element content and attributes — this converter handles both when generating typed models. The parser handles deeply nested structures and generates matching nested Json Schema $schema / properties definitions.

How are optional fields handled in the Json Schema output?

Fields that may be absent or null in your XML are marked as optional in the generated Json Schema code. Note: JSON Schema required is an array at the parent level — a field not listed in required is optional even if it has a defined type.

Can I use the output directly in a OpenAPI specs project?

Yes. The generated Json Schema code follows idiomatic patterns for OpenAPI specs — you can copy it directly into your project.

Related tools on LangStop

If you work frequently with XML and Json Schema, bookmark this page to skip the manual model-writing step entirely.