Brazilian CPF validator
Check whether a Brazilian CPF is valid by computing its module-11 check digit. The tool also shows the tax region of the number. Free, no sign-up, no data sent.
Brazilian CPF validator
Check whether a CPF actually exists: the last two digits are derived from the first nine by modulo 11. The ninth digit even reveals the fiscal region that issued the number. Runs in your browser.
Enter a CPF to validate.
Frequently asked
How does CPF validation work?
A CPF has 11 digits, with the last two computed from the first nine using module 11. If the check-digit calculation doesn't match the digits given, the number is invalid.
What does the ninth digit of a CPF indicate?
The tax region that issued the number, not the state where the person lives. Digit 8, for example, corresponds to São Paulo; digit 7 to Rio de Janeiro and Espírito Santo.
This is the pocket version
The tool above solves one calculation. What I do under contract is keep it running inside your system, on your data, with nobody typing anything.