Mock Data Generator – Generate Test Data
Generate realistic mock data for testing with customizable schemas, multiple formats (JSON, CSV, SQL), and seeded randomness.
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› About this tool · FAQ
Stop manually creating test data! Generate realistic mock data for testing, development, and prototyping with customizable schemas, data types, and relationships. Create users, products, orders, addresses, or custom data structures in JSON, CSV, SQL, XML, and YAML formats. Perfect for API testing, database seeding, and development demos. Free, works offline, unlimited data generation.
How do I generate mock data?
Select data type (users, products, orders, addresses, or custom), configure count and options, choose output format (JSON, CSV, SQL, XML, YAML), and click Generate. The tool creates realistic test data with customizable schemas and relationships instantly.
Is this mock data generator free?
Yes, completely free with unlimited mock data generation. No signup required, no watermarks. Generate test data in any format and language instantly in your browser.
Is generated data uploaded to servers?
No, all mock data generation happens locally in your browser. Your test data, schemas, and configurations never leave your computer for maximum privacy.
What data types can be generated?
The tool supports users, products, orders, addresses, and custom data structures. Custom schemas allow you to define specific field types and constraints.
How do I create reproducible data?
Use a custom seed value to generate the same data set every time. This is useful for consistent testing environments and reproducible results.
What output formats are supported?
Data can be generated in JSON, CSV, SQL INSERT statements, XML, and YAML formats. Each format is optimized for different use cases.
Can I generate data in different languages?
Yes! The tool supports multiple locales including English, Spanish, French, German, Italian, Portuguese, Russian, Japanese, and Chinese with localized names and locations.
How do I define custom data schemas?
Use JSON format to define field types, constraints, and options. Supported types include string, number, boolean, date, email, phone, and many more.