Batch CNPJ Generator
Generate multiple valid CNPJs (numeric and alphanumeric) for testing. 100% free.
Enter CNPJs to validate, one per line (numeric or alphanumeric)
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Generate CNPJs in Bulk - Numeric and Alphanumeric
Generate large quantities of valid CNPJs for testing with our free batch generator tool. This tool supports both traditional numeric CNPJs and the new alphanumeric format introduced by IN RFB 2.119/2022, making it perfect for developers, QA engineers, and testers who need realistic test data.
How Batch CNPJ Generation Works
Select the quantity you need, from 10 to 1,000 CNPJs per batch. Choose between numeric format (14 digits), alphanumeric format (letters and numbers), or both formats mixed together. Each generated CNPJ passes the official Modulo 11 check digit algorithm, ensuring mathematical validity for any validation system you are testing against.
Flexible Output Options
Export your generated CNPJs in multiple formats: plain text with one CNPJ per line, CSV format for importing into spreadsheets and databases, or JSON format for API testing and development workflows. You can also choose between formatted output with dots, slashes, and hyphens or raw unformatted numbers.
Testing and Development Use Cases
Developers and QA engineers need valid CNPJs to test registration forms, payment systems, tax calculation software, and government integrations. Using invented numbers often fails validation checks. Our generator ensures every CNPJ is mathematically valid, enabling automated testing without interruptions. All processing happens locally in your browser with no server requests, guaranteeing complete data privacy.