Does a valid CPF mean it exists?

Not necessarily. The validation only checks if the number follows the correct mathematical pattern. It does not check if it is registered with the Receita Federal.

Does the tool generate CPFs?

No, the tool only validates whether a provided CPF has the correct check digits.

CPF Validator

Check if a CPF is valid quickly and for free

Enter the CPF

How does the validation work?

• A CPF has 11 digits, with the last 2 being check digits
• The check digits are calculated using a mathematical algorithm
• CPFs with all identical digits are invalid (e.g.: 111.111.111-11)
• The validation only checks the format, it does not confirm if the CPF exists at the Receita Federal