Brazil CPF & CNPJ Validator – Free Online Tool
Brazil CPF & CNPJ Validator
Instantly check if a CPF or CNPJ is mathematically valid.
About the Brazil CPF & CNPJ Validator
The Brazil CPF and CNPJ Validator is a crucial tool for developers, e-commerce managers, and financial analysts who need to verify the authenticity of Brazilian identification numbers. A CPF (Cadastro de Pessoas Físicas) is issued to individuals, while a CNPJ (Cadastro Nacional da Pessoa Jurídica) is issued to businesses. Both numbers use a specific mathematical algorithm (modulo 11) for their check digits. Our tool instantly validates any inputted number against this algorithm, ensuring that the CPF or CNPJ is structurally valid. Whether you are validating user registrations or checking a vendor's corporate ID, this free online tool prevents data entry errors and fraud in Brazilian systems.
Frequently Asked Questions
What is the difference between CPF and CNPJ?
CPF is an 11-digit number for individuals (citizens and residents), whereas CNPJ is a 14-digit number for registered businesses and legal entities in Brazil.
Does this check if the CPF is active with the Receita Federal?
No, this tool performs a mathematical checksum validation to ensure the number format is physically valid. It does not interface with government databases to check the individual's credit, tax status, or if the number actually belongs to a real person.
Can it format unformatted numbers?
Yes, the tool automatically strips out any punctuation (dots, dashes, slashes) and validates the raw digits. It accepts both formatted and unformatted inputs effortlessly.
How to use the Brazil CPF & CNPJ Validator tool
Using our Brazil CPF & CNPJ Validator is incredibly easy and entirely free. We designed our Developer Tools specifically for everyday users who need to get things done quickly without downloading complicated software or registering for an account.
- Enter ID: Input a CPF or CNPJ number.
- Validate: Click validate to check the modulo 11 algorithm.
100% Secure
Your files are encrypted and automatically deleted from our servers after 1 hour. Your privacy is guaranteed.
Lightning Fast
We use high-performance cloud processing to ensure your files are ready in seconds, not minutes.
Works on Mobile
No app installation needed. Use our tools seamlessly on iOS, Android, Mac, or Windows.