Brazil CNPJ Validator

Validate Brazil CNPJ

Enter a Brazilian Company Number to verify its validity.

About this Validator

This tool validates Brazilian National Registry of Legal Entities numbers (CNPJ - Cadastro Nacional da Pessoa Jurídica) according to the official format requirements.

The validator checks if a given CNPJ follows the correct structure and verifies the check digits using the official algorithm.

This validation only confirms if a CNPJ follows the correct format. It does not verify if the number is actually registered with Brazilian authorities.

What is a Brazilian CNPJ?

CNPJ Structure (14 digits): • First 8 digits: Base company identifier • Next 4 digits: Business unit identifier • Last 2 digits: Check digits

Format Rules: • Total length: 14 digits • No letters or special characters • Common format: XX.XXX.XXX/XXXX-XX • Each business unit has unique number

Used for: • Company registration • Tax administration • Business transactions • Legal documentation

If you need to generate a CNPJ for testing purposes, here is a Brazilian CNPJ Generator