id_card CPF Generator

What is a CPF?

The CPF (Cadastro de Pessoas Físicas) is the Brazilian Individual Taxpayer Registry, the most important fiscal identification document in Brazil, managed by the Federal Revenue Service. It consists of 11 digits, with the last two being "check digits".

How the CPF Algorithm Works

The CPF number is not random. It follows a precise mathematical logic:

• The first 8 digits are the base number.
• The 9th digit indicates the Fiscal Region of origin (e.g., 8 for São Paulo).
• The last 2 digits are calculated using the Modulus 11 algorithm, ensuring the number's integrity.

Why Use a CPF Generator?

Software developers, QA testers, and data analysts often need valid CPF numbers to:

• Test registration forms in systems and e-commerce platforms.
• Validate input masks and formatting.
• Perform load testing with realistic data.