CNPJ Generator

Generated CNPJs are only mathematically valid (pass digit validation), but are not registered with the Federal Revenue. They are fictitious CNPJs that should ONLY be used for testing in development. Never use in tax documents or real contracts.

CPF (Individual Taxpayer Registry) has 11 digits and identifies individuals. CNPJ (National Registry of Legal Entities) has 14 digits and identifies companies. Both use validation algorithms with check digits, but the calculations are different.

Yes! Generated CNPJs are ideal for automated tests, CI/CD, integration tests, and staging environments. They pass format validations without using real company data. Many testing frameworks use CNPJ generators to create test data.