CPF Generator and Validator
Generate valid CPFs for testing or validate existing CPFs
What is CPF?
CPF (Cadastro de Pessoa Física) is an individual identification document issued by the Brazilian Federal Revenue Service. It consists of 11 numeric digits following the format xxx.xxx.xxx-xx, where the last two digits are check digits calculated through a mathematical algorithm.
How does the validation algorithm work?
CPF uses a validation algorithm based on modulo 11. The last two digits are calculated from the first nine, ensuring the integrity of the number. Our generator creates CPFs that pass this mathematical validation.
What are generated CPFs used for?
CPFs generated by this tool are mathematically valid, but do not represent real people or official documents. They are useful for:
- Software and application testing that requires CPF validation
- System demonstrations and training
- Form and interface development
- Field filling in staging environments
Is it safe to use CPF generators?
Yes, as long as it's used for legitimate purposes. Our tool works 100% in your browser, without sending any data to external servers. Generated CPFs are random and don't belong to any real person. Important: never use generated CPFs for fraud or illegal activities.
Difference between mathematical and official validation
Our tool validates whether the CPF is mathematically correct (if the check digits are correct). This does not mean that the CPF exists in the Federal Revenue Service database. To verify if a CPF is regularized, you must consult the official Federal Revenue Service website.
Guaranteed privacy
All operations (generation and validation) are performed locally in your browser using JavaScript. No CPF entered or generated is stored or sent to any server. Your privacy is 100% protected.
Frequently Asked Questions
Yes, the generated CPF follows the official validation algorithm from the Brazilian Federal Revenue, with correct check digits. However, these are fictitious numbers for testing purposes.