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Test Data Generator Tool

Easily generate dummy data for development and testing. Supports 50+ data types from Japanese names, addresses, and My Number to JWT, API keys, and Lorem ipsum. Export as CSV, JSON, or SQL. Free with no registration required.

Field definition
EnabledField nameTypeSettings

Count

Add fields and click Generate.

How to use

About this tool

A tool that makes it easy to generate dummy data for development and testing. Features • 50+ data types - Personal info, business, Web/IT, finance, and more • Full Japanese support - Names, addresses, My Number, Japanese era, etc. • Multiple output formats - CSV, JSON, and SQL INSERT statements • Completely free - No registration or limits

How to use

Add fields via presets or manually, set count, format, and language, then click Generate. Preview and stats are shown; export via Copy or Download. Use ⚙ to adjust name, email, age, date, and amount options.

Options

Output format: JSON, CSV, TSV, SQL INSERT, PHP array, JavaScript array, XML, Laravel Seeder.

Language: Japanese, English, or Random (for names, etc.). Count: 1–10,000. Table name: for SQL/Seeder. Presets: user, customer, product, order, log, employee master.

Supported data types: Personal (name, address, phone, My Number, etc.) / Business (company, department, job title, etc.) / Web & IT (UUID, JWT, API key, IP address, etc.) / Financial (credit card, cryptocurrency, etc.) / Date & time (Japanese era, timestamp, etc.) and more

Use cases

• Creating test data for applications • Seeding databases with initial data • Building UI mockups • Sample data for presentations • DB seeds and Laravel Seeder input • JSON for API mocks and stubs • List and form test data • Bulk data for performance tests • Format and import verification • Dummy data for My Number, JWT, API keys, Japanese era, star rating, progress %, etc.

Privacy and data

All generation is done in the browser; no input or generated data is sent to any server.

FAQ

Q: What output formats are available?
A: JSON, CSV, TSV, SQL INSERT statements, PHP array, JavaScript array, XML, and Laravel Seeder. Select the format that matches your use case — for example, SQL INSERT for seeding a database or JSON for API mock data.
Q: How many records can I generate at once?
A: Up to 10,000 records per generation. For very large datasets, generate in batches and combine the outputs.
Q: What data types are supported?
A: Personal info (name, address, phone, My Number, etc.), business data (company, department, job title), Web/IT fields (UUID, JWT, API key, IP address, etc.), financial data (credit card, cryptocurrency), date/time fields (Japanese era, timestamp), and more — over 50 types in total.
Q: Can I generate Japanese test data including addresses and My Number?
A: Yes. Select Japanese as the language and personal info presets include Japanese names, addresses, phone numbers, and My Number (個人番号) formatted data.
Q: Does this tool send my generated data to a server?
A: No. All generation happens entirely in the browser. No input settings or generated data are sent to any server.