GenCore
GenCore helps developers, QA engineers, and testers generate realistic, valid test data. One platform, multiple generators — phone numbers, users, addresses, credentials, and more. Free, fast, and powered by open-source libraries.
Our Generators
Choose a generator to get started. New tools added regularly.
Credit Card Generator
Generate valid credit card numbers for testing payment systems.
Crypto Wallet Generator
Generate cryptocurrency wallet addresses for testing.
IBAN Generator
Generate valid IBAN numbers for international bank testing.
JSON Generator
Generate realistic JSON data structures for API testing.
License Plate Generator
Generate realistic license plates for multiple countries.
Lorem Ipsum Generator
Generate placeholder text for design and layout mockups.
Mock API Generator
Generate mock REST and GraphQL API endpoints for development.
QR Code Generator
Generate QR codes for URLs, text, and contact data.
Text Generator
Generate random text strings, sentences, paragraphs for testing.
Vehicle Generator
Generate realistic vehicle data — VIN, plates, make, model, year.
Why GenCore?
One platform for all your test data needs. Built for developers, by developers.
Developers
- ✓Generate realistic test data in seconds
- ✓Multiple output formats per generator
- ✓Open-source libraries under the hood
QA Engineers
- ✓Validate edge cases with real-looking data
- ✓Generate bulk test data for performance testing
- ✓Consistent, reproducible results
Designers
- ✓Create realistic mockups with real data
- ✓Test UI with various data formats
- ✓No more lorem ipsum placeholders
Students & Educators
- ✓Learn data validation patterns
- ✓Practice with real-world data formats
- ✓Free and unlimited use
Businesses
- ✓Test CRM and customer systems
- ✓Generate demo environments
- ✓Prototype with realistic data
DevOps
- ✓CI/CD pipeline test data generation
- ✓API testing with valid payloads
- ✓Automation-friendly outputs
Roadmap
What we've built and what's coming next.
Phone Generator
Valid phone numbers for 245+ countries with libphonenumber-js validation.
User Generator
Realistic user profiles with names, addresses, and contacts.
Credential Generator
Secure passwords, passphrases, PINs, and API keys.
Email & Username Generators
Generate realistic emails and usernames for testing.
Platform Homepage
Unified platform landing page with product discovery.
Address Generator
Valid addresses for countries worldwide.
Company Generator
Fictional company profiles with industry data.
Self-serve Product Addition
Add new products and generators via config — no code changes.
Frequently Asked Questions
Ready to generate?
Start with the Phone Generator — create valid phone numbers for 245+ countries in seconds.