Dummy Data Generator Dummy Data Generator
Local generation Up to 100,000 rows

✨ Features

  • Generate up to 100,000 rows of JSON/CSV dummy data fast, entirely in your browser
  • 35+ data types including name, address, email, phone, date, and more
  • Japan-specific types: fictional My Number, invoice numbers, traditional colors, kaomoji
  • Share schemas via URL, fully local processing, no upload

🪄 Perfect for

Development & testing data

Instantly generate the dummy data you need for app development or testing. Import CSV directly into your database.

Design mockups

Bulk-generate realistic sample names, addresses, and prices for UI design mockups.

ML / data analysis prep

Prepare training data without using real personal information. Use custom schemas tailored to your project.

Presentations & demos

Quickly prepare realistic-looking sample data for internal demos or client presentations.

🔒 Privacy

This tool runs entirely in your browser. The schema you define and the data generated are never sent to any server.

❓ Frequently Asked Questions

What is the maximum number of rows I can generate?

Up to 100,000 rows. Large datasets can be downloaded as JSON or CSV.

Where is the generated data stored?

Data lives only in browser memory. Nothing is sent to a server, and it disappears when you close the tab.

Can I share a schema with my team?

Yes. The current schema is encoded in the URL. Copy and share the URL to reproduce the exact same schema.

Where does the generation happen?

Entirely in your browser. The schema you enter and the data you generate are never sent to any server.
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