Batch CNPJ Validator

Batch CNPJ Validation - Numeric and Alphanumeric

Validate large lists of CNPJs at once with our free batch validation tool. The tool automatically detects whether each CNPJ is numeric or alphanumeric and applies the correct validation algorithm, ensuring accurate results for both traditional 14-digit numeric CNPJs and the new alphanumeric format introduced by IN RFB 2.119/2022.

How Batch CNPJ Validation Works

Enter up to 1,000 CNPJs at once, one per line. The validator processes each number individually, checking the mathematical validity of the two check digits using the Modulo 11 algorithm. For alphanumeric CNPJs, the tool converts letters to their numeric equivalents before calculating the verification digits. Results appear in real time, clearly marking each CNPJ as valid or invalid.

Automatic Format Detection

You do not need to specify the format. The tool automatically identifies whether a CNPJ is numeric (e.g., 11.222.333/0001-81) or alphanumeric (e.g., AB123456000100) and applies the appropriate validation rules. Formatted and unformatted inputs are both accepted, with punctuation such as dots, slashes, and hyphens handled automatically.

Use Cases for Batch Validation

This tool is essential for developers testing database integrity, accountants verifying client records, and compliance teams auditing supplier lists. Batch validation saves hours of manual verification by processing hundreds of numbers simultaneously. All processing happens locally in your browser, ensuring complete privacy and security for your data.