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JSON Schema Generator

Generate JSON Schema from sample payloads for validation rules, contracts, and structured AI outputs.

Last updated: February 23, 2026

JSON Schema Generator

Generate a JSON Schema from sample payloads for validation, API contracts, and AI tool inputs.

Include examples in schema output

Sample JSON

Generated Schema

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "title": "GeneratedSchema",
  "type": "object",
  "properties": {
    "id": {
      "type": "integer"
    },
    "name": {
      "type": "string"
    },
    "email": {
      "type": "string",
      "format": "email"
    },
    "active": {
      "type": "boolean"
    },
    "tags": {
      "type": "array",
      "items": {
        "type": "string"
      }
    },
    "profile": {
      "type": "object",
      "properties": {
        "createdAt": {
          "type": "string",
          "format": "date-time"
        },
        "website": {
          "type": "string",
          "format": "uri"
        }
      },
      "required": [
        "createdAt",
        "website"
      ],
      "additionalProperties": false
    }
  },
  "required": [
    "id",
    "name",
    "email",
    "active",
    "tags",
    "profile"
  ],
  "additionalProperties": false
}

How To Use JSON Schema Generator

Generate JSON Schema from sample payloads for validation rules, contracts, and structured AI outputs. This tool runs in-browser for fast results without account setup.

1Open the JSON Schema Generator and add your input data.
2Adjust the options to match your use case.
3Run the tool and review the output details.
4Download, copy, or reuse the result immediately.

FAQ

Is JSON Schema Generator free to use?

Yes. JSON Schema Generator is free to use on ConvertCrunch.

How accurate is JSON Schema Generator?

Results depend on the inputs and assumptions you provide. Always validate final numbers or outputs against your official workflow before publishing or filing.

Do I need an account to use JSON Schema Generator?

ConvertCrunch tools are built for immediate use with no signup required.

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