Mock Data Generator
LocalBuild a schema with 25+ field types and generate up to 10,000 rows of realistic fake test data. Export to JSON or CSV — runs entirely in your browser.
All data is generated locally in your browser · No uploads · Up to 10,000 rows
What Is a Mock Data Generator?
A mock data generator creates synthetic, realistic-looking data for use in software testing, database seeding, API development, and UI prototyping. Instead of manually crafting test data or using real user records (which raises privacy concerns), developers use mock data generators to produce large volumes of structured fake data on demand.
This tool supports 25+ field types including names, emails, addresses, UUIDs, dates, company names, phone numbers, and more — all generated locally in your browser using a fast, dependency-free engine.
Common Use Cases
- Seeding development and staging databases
- Testing REST APIs, GraphQL endpoints, and data pipelines
- Filling UI components and demo screens with realistic previews
- Load testing with large datasets
- Training ML models with synthetic labeled data
- Generating sample CSVs for spreadsheet templates
Why Not Just Use AI?
AI chatbots like ChatGPT generate 5–15 rows before hitting limits. They can't reliably maintain consistent schemas at scale, and they need you to describe the format every time. This tool generates up to 10,000 rows instantly with a persistent, reusable schema — no prompting, no API key, no context window limits.
Mock Data Generator FAQs
A mock data generator creates realistic but fake data for testing and development. It lets you fill databases, test APIs, and prototype UIs without using real user data.
Yes. All data is generated entirely in your browser using JavaScript. Nothing is sent to any server. Your schema and generated data never leave your machine.
You can generate up to 10,000 rows in a single run. For larger datasets, generate multiple batches and combine the CSV/JSON files.
You can export as JSON (array of objects) or CSV (with header row), suitable for databases, spreadsheets, and API testing.
Yes. Select the 'Custom list…' field type and enter your own comma-separated values. The generator will randomly pick from your list for each row.
AI chatbots typically generate 5–10 rows before hitting context limits or truncating output. This tool generates up to 10,000 rows instantly, all locally without any API calls or usage limits.