Mock Data Generator

Generate realistic fake JSON data for testing and development. Define a schema and produce any number of records instantly in your browser.

How It Works

The Mock Data Generator parses your JSON schema definition and produces realistic fake data entirely in your browser — no data is sent to any server.

• Schema-driven — define your data shape as a JSON object where values are type strings like "email", "integer", "boolean"
• Nested structures — supports objects within objects and arrays of typed items
• Parameterized types — types like integer(1,100), float(0,1), and enum(a,b,c) accept arguments
• Realistic output — names, emails, addresses, and other fields are drawn from curated word lists for plausible results
• Bulk generation — generate up to 1,000 records at once for load testing or seeding databases

Common Use Cases

• API prototyping — generate mock API responses before the backend is ready
• Frontend development — populate UI components with realistic sample data
• Database seeding — create seed data for development or staging environments
• Testing — generate diverse data sets to exercise edge cases and validate schemas
• Documentation — produce example payloads for API docs and tutorials