Data & testing generators
Synthetic data to test your apps: sample names, addresses, emails and phone numbers, Luhn-valid test cards (testing only), datasets, mocks and validators — all clearly synthetic and safe to use.
31 tools in this category.
Analytics Event Generator Generate consistent event names for Google Analytics, Mixpanel, Amplitude, or Segment. Object-action conventions ready to implement in your tracking plan. API Mock Response Generator Generate realistic JSON mock responses for REST endpoints. Speed up frontend development without waiting for backend or paying for synthetic data services. Application Log Generator Generate realistic application logs for testing and development. Error messages, warnings, info and debug with professional format for your tests. BIC / SWIFT Validator Validate international BIC/SWIFT bank codes instantly. Verify 8 or 11 character structure: bank, country, location, and optional branch code. CBU Validator (Argentina) Validate Argentine CBU instantly. Verify 22 digits with double checksum: bank+branch and account. Real-time error detection for transfers. Chilean RUT validator Validate Chilean RUT online with the modulo 11 algorithm. Accepts K check digit. Free for individuals and companies. CPF Validator (Brazil) Validate Brazilian CPF instantly. Verify 11 digits with 2 check digits. Automatically rejects invalid sequences like 111.111.111-11. Credit card validator (Luhn) Validate credit card numbers with the Luhn algorithm. Detects typos in Visa, MasterCard, AmEx and more. Free and online. CUIT / CUIL validator Validate Argentine CUIT and CUIL online with the modulo 11 algorithm. Verifies check digit and prefix. Free for companies and individuals. Cypress Fixture Generator Generate realistic JSON fixtures for Cypress E2E tests. User data, products, API responses and more. Speed up your testing suite now. Edge Case Test Generator Generate edge cases for testing: null values, empty strings, numeric boundaries, special characters. Improve test coverage with real problematic inputs. Fake address generator Generate realistic postal addresses for testing and fixtures. US, UK, Canada and Australia. Synthetic data, not for production use. Fake email generator Generate fake emails using standard test domains (example.com, test.com). For fixtures, forms and QA. No mail is delivered to anyone. Fake name generator Generate realistic fake first and last names for testing, fixtures and demo data. US, Hispanic or mixed. Nothing is sent to a server. Fake phone number generator Generate phone numbers with realistic format for the US, UK, Canada and other countries. For fixtures, forms and QA, without calling anyone. Free Mocktail Name Generator Generate unique names for mocktails and zero-proof drinks. Mix flavor and sensation and get 20 ideas for bar, cafe or event menus. GDPR Compliant Test Data Create GDPR-compliant test datasets for development. Realistic synthetic data without violating privacy regulations for secure testing environments. IBAN Validator Validate international IBAN bank account numbers instantly. Check format, mod 97 checksum, and country code. Supports all official IBAN standards. ISBN-10 validator Validate ISBN-10 book codes with the modulo 11 algorithm. Accepts format with hyphens and X digit. Free for publishers and libraries. ISBN-13 validator Validate ISBN-13 book codes (since 2007) with the modulo 10 algorithm. Compatible with EAN-13. Free for publishers and bookstores. Luhn-Valid Card Generator Generate test card numbers that pass Luhn validation (no real value). For checkout testing, validators, and payment forms in development. ML Dataset Generator Create synthetic datasets for machine learning: classification, regression, clustering and more. Realistic data for training and testing models. MongoDB Query Generator Generate MongoDB queries with aggregations, filters, and operators. Ready-to-use examples for find, aggregate, update and more. Copy and tweak instantly. Random date generator Random dates in any range and format. Spanish DNI Validator Validate Spanish DNI instantly. Verify 8 digits + letter format and calculate modulo 23 checksum. Includes NIE validation and correct letter verification. Stripe Test Data Generator Generate valid test data for Stripe API: cards, tokens, webhooks and edge cases. Speed up your development without using real production data. Test credit card generator (Luhn) Generate Luhn-valid credit card numbers for testing. Visa, Mastercard, Amex and others. QA only — these are not real cards. Test data generator (CSV/JSON) Generate synthetic datasets with names, emails, addresses and more. Export as CSV or JSON, ready to import into your database or tests. Test Factory Generator Generate test factories fast with battle-tested patterns. Speed up your test suite with realistic, consistent mock objects. Test Name Generator Generate descriptive test names following Given/When/Then or the "should..." pattern. Compatible with Jest, Vitest, Mocha, RSpec, JUnit. Webhook Payload Generator Generate realistic test payloads for JSON webhooks. Simulate GitHub, Stripe, Slack events and more. Perfect for integration testing and development.