Argentina CUIT / CUIL decoder
Decode and validate an Argentine CUIT (tax ID) or CUIL (labour ID). The 11-digit number is structured as a 2-digit type prefix, an 8-digit DNI (for individuals) or company serial, and a final modulo-11 check digit. This tool verifies the check digit, identifies the prefix (male, female, or company), and reads the DNI.
It is privacy-first: nothing leaves your browser. The decoder only verifies the structure and check digit — it never checks the number against any AFIP database.