JSON to JSON Schema Converter

How to use

1. Paste JSON input from your API payload or sample document.
2. Select your output target and model options.
3. Generate, review, and copy the result.

Benefits

• Handles nested objects and arrays from API responses.
• Reduces manual model writing and naming inconsistencies.
• Works instantly in browser with copy-ready output.

Best use cases

• Generate JSON Schema documents for API contract validation.
• Share schema definitions across services and frontend tooling.
• Create validation artifacts for data ingestion pipelines.

Type mapping notes

• Object structures map to schema properties blocks.
• Primitive values map to JSON Schema type constraints.
• Required fields are inferred from provided sample payloads.

Implementation tips

• Review required arrays for optional API fields.
• Version schemas when payload contracts evolve.
• Use schemas in CI validation for request and response samples.

Sample JSON

{
  "id": 101,
  "name": "Ada Lovelace",
  "active": true,
  "roles": ["admin", "editor"],
  "profile": {
    "email": "ada@example.com",
    "score": 9.8
  }
}

Sample output

{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "type": "object",
  "properties": {
    "id": { "type": "integer" },
    "name": { "type": "string" },
    "active": { "type": "boolean" }
  },
  "required": ["id", "name", "active"]
}

FAQ