cnpjClassic tool
CNPJ Generator
Generate valid CNPJ numbers for tests with or without formatting.
Choose how many CNPJ numbers you need and generate valid values for test environments, demos, documentation and interface validation. The tool does not create real company registrations, but it is useful when you need consistent mock data for forms and systems.
You can also switch between formatted and plain output to match the scenario you are testing.
Use clear inputs to get a more useful result.