Mock Data Generator
Generate realistic fake data for testing, demos, and development. Export as JSON or CSV. All generated locally — no server calls.
Free Mock Data Generator — Generate Test Data Instantly
Need test data for your app? This tool generates realistic mock data — users, addresses, companies, and API responses — in JSON or CSV format. Perfect for prototyping, populating databases, writing tests, and creating demos. No API calls, no server, all in your browser.
When to use: Filling a dev database, testing API endpoints, creating demo accounts, writing unit tests, prototyping UI components.
FAQ
What is a mock data generator?
A mock data generator creates realistic but fake data for software testing and development. It helps you populate databases, test APIs, and prototype UIs without using real user information.
Is the generated data real?
No. All data is randomly generated from preset name lists, company names, and address patterns. None of it corresponds to real people or businesses.
Can I use this for production databases?
Yes — it's great for seeding development and staging databases. Since data is fake, there are no privacy concerns.
What output formats are supported?
JSON (array of objects), CSV (with headers), and plain text. For API responses, it generates the full response envelope with status codes.
How many records can I generate?
Up to 1,000 records per generation. For larger datasets, generate multiple batches.
Where is my data processed?
Everything runs in your browser. No data is sent to any server — we never see what you generate.
Is this tool free?
Yes, completely free. No signup, no limits.
Can I contribute more data templates?
Yes! The project is open source at github.com/Linanxi12/devbox-tools. Contributions welcome.