Dummy Data Generator

Generate realistic mock data (JSON, CSV, SQL) for development and testing.

Schema Definition

Generate Realistic Mock Data | Streamline Your Development Workflow

Stop manually typing "test1" and "test2" into your database. Generate structured, production-like datasets for API mocking, database seeding, and UI stress testing in seconds.

Build Custom Schemas Without Scripts

High-quality applications require data that mimics the real world. This tool lets you build complex schemas and generate hundreds of rows of data without writing a single line of code.

Whether you’re a frontend developer needing a quick JSON response or a backend engineer requiring SQL inserts to populate a dev environment, this tool handles the heavy lifting.

Core Features

  • Define Flexible Schemas: Map custom keys (like user_id or created_at) to realistic data types including UUIDs, full names, and phone numbers.
  • Export to Multiple Formats:
  • JSON: Optimized for REST and GraphQL API mocks.
  • CSV: Ready for spreadsheet analysis and bulk imports.
  • SQL: Standard INSERT INTO statements for instant database population.
  • Preview Instantly: Verify your schema by viewing the first 10 rows in a live table before downloading your full dataset.

Privacy & Performance

  • Browser-Local Generation: Your data never leaves your machine. All processing happens locally in your browser to ensure maximum privacy and security.
  • Optimized Limits: Generate up to 1,000 rows per batch to maintain smooth browser performance.
  • Commercial Ready: All procedurally generated data is free to use for any purpose, including commercial software testing.

Why High-Quality Mock Data Matters

Using "garbage" text often masks UI bugs. Real-world data helps you identify layout breaks caused by long names or logic errors triggered by specific date formats early in the development cycle. By testing against realistic distributions, you build more resilient applications.