Mock Data from JSON Schema

Runs in your browser — nothing is uploaded

JSON Schema

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "type": "object",
  "required": ["id", "name", "email", "role"],
  "properties": {
    "id": { "type": "string", "format": "uuid" },
    "name": { "type": "string" },
    "email": { "type": "string", "format": "email" },
    "age": { "type": "integer", "minimum": 18, "maximum": 80 },
    "role": { "enum": ["admin", "editor", "viewer"] },
    "active": { "type": "boolean" },
    "createdAt": { "type": "string", "format": "date-time" },
    "employeeCode": { "type": "string", "pattern": "^[A-Z]{2}-\\d{4}$" },
    "address": { "$ref": "#/$defs/address" },
    "tags": { "type": "array", "items": { "type": "string" }, "minItems": 1, "maxItems": 4 }
  },
  "$defs": {
    "address": {
      "type": "object",
      "required": ["street", "city", "country"],
      "properties": {
        "street": { "type": "string" },
        "city": { "type": "string" },
        "zip": { "type": "string", "pattern": "^\\d{5}$" },
        "country": { "type": "string", "minLength": 2, "maxLength": 2 }
      }
    }
  }
}

Records

Seed

Output

Optional properties

Realistic values from property names

Use examples and defaults from the schema

About this tool

Paste a JSON Schema and get realistic sample data that follows it, for tests, demos and API mocks. It understands formats such as email, uuid and date-time, enums, number and length limits, nested objects, arrays and $ref. Set a seed to get the same data every time. Everything runs in your browser.

Frequently asked questions

What is Mock Data from JSON Schema?

Generate realistic sample JSON that follows a JSON Schema, with a repeatable seed. It is one of the JSON, XML & YAML tools on MyCodeTips.

How do I use Mock Data from JSON Schema?

Open the tool, enter or paste your input, and the result appears right away. Use the Copy button to copy it.

Is Mock Data from JSON Schema free to use?

Yes. It is free to use and does not need an account.

Is my data safe with Mock Data from JSON Schema?

Yes. It runs entirely in your browser, so what you enter is never uploaded to our servers.

Can I share my result?

Yes. Use the share buttons below the tool to post a link or copy a link to the tool page.

Which tools are related to Mock Data from JSON Schema?

JSON Schema Generator, JSON Formatter & Validator, JSON to Types Generator.

Related tools

JSON Schema Generator

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