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Test Data Generator
Generate realistic test data. A browser-based developer tool that runs entirely client-side — no data is sent to our servers, no account required.
Use Test Data Generator now
Free — open instantly, no account needed.
What it does
The Test Data Generator is designed for developers who need to generate realistic test data quickly and accurately, without setting up local tools or depending on third-party services.
Whether you're working in testing / qa or integrating it into a broader development pipeline, this tool saves time and reduces the risk of manual errors. All processing runs in your browser — your data never leaves your machine.
- ► Setting up automated test suites for CI/CD pipelines
- ► Generating realistic mock data for integration tests
Key features
- ✓Names, emails, phone numbers, addresses
- ✓Dates in ISO, Unix, and human formats
- ✓Credit card and IBAN numbers (test only)
- ✓Configurable locale (US, UK, DE, JP)
- ✓Outputs as JSON, CSV, or SQL INSERT
Example
Generate 2 user records
Input
Type: user | Count: 2 | Locale: US
Output
[
{ "name": "Sarah Mitchell", "email": "s.mitchell@example.com", "phone": "+1-555-0142" },
{ "name": "James Chen", "email": "j.chen@example.com", "phone": "+1-555-0281" }
]
How to use it
- Open Test Data Generator by clicking on it in the Dev-Belt dashboard.
- Enter your input in the provided fields — all processing happens instantly in your browser.
- Copy the output using the Copy button, or paste it directly into your project.
- No sign-in required — the tool is ready to use immediately on page load.
When to use this in your project
Populating a development database
Generate realistic user records, orders, or transactions to make the UI look like real production data during development.
Writing integration tests
Use mock responses to test your API client code without depending on a live backend.
Load testing before launch
Generate a k6 or Artillery script to stress-test your endpoints before production traffic hits.
Developer notes
!Mock data should resemble production data in shape but must never contain real user PII.
!Run load tests in a staging environment only — running against production will affect real users.
!Edge cases to always test: empty input, null values, max-length strings, Unicode characters, negative numbers.
Privacy & Security
All Dev-Belt tools run 100% in your browser using client-side JavaScript. Your input data is never sent to our servers, never logged, and never stored. This includes code snippets, credentials, tokens, API keys, and any other sensitive information you enter. We only track authentication events for account management — never tool usage, search queries, or input data.
Related keywords
testingmock-datafaker
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246 Developer Tools — One Dashboard
Test Data Generator is one of 246 browser-based tools on Dev-Belt. Free tools work instantly — no account required. Pro unlocks the full suite at $12/month.