Mock Jutsu

The Ultimate Algorithmic Mock Data Engine.
390+ Types. 6 Locales. Zero Dependencies.

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Mock Jutsu is an open-source algorithmic mock data engine for generating format-valid synthetic test data with real checksums. It supports 390+ data types — IBAN, TCKN, credit cards (Luhn), VIN, NHS, SWIFT, MRZ, and national IDs (CPF, PESEL, BSN, SSN, DNI) — across 6 locales. Available as a Python package, CLI tool, REST API, and Apache JMeter plugin with zero external dependencies.