A CPF generator writen in Go.

The CPF number (Cadastro de Pessoas Físicas; Portuguese for "Natural Persons Register") is the Brazilian individual taxpayer registry identification. This number is attributed by the Brazilian Federal Revenue to Brazilians and resident aliens who, directly or indirectly, pay taxes in Brazil. It is an 11-digit number in the format 000.000.000-00.

This program generates valid CPF numbers according to given criteria. See program help for more details.

After cloning the repository, you can run the program either with go run ./main.go or by compiling it with go build and then running ./CPFgen.

./CPFgen -h
Usage of ./CPFgen:
  -e	use heuristics when generating CPF
  -f int
    	output format (1: 11122233345,
    	  2: 111.222.333-45, 3: 111222333-45) (default 1)
  -l	list regions and their codes
  -n int
    	generate n random CPF numbers
  -o string
    	output results to file
  -r string
    	comma-separated list with region codes (default "0,1,2,3,4,5,6,7,8,9")
  -v	verbose

Randomly generate 50000 CPFs (-n 50000) from São Paulo (-r 8) and write results to output/cpf-sp.txt.

./CPFgen -r 8 -n 50000 -o output/cpf-sp.txt

• The output can easily reach the order of Gigabytes. Ensure you have enough disk space before saving any output.
• When using -o, the provided file will be overwritten without confirmation.

This program is licensed under GNU GPLv3. For more information, refer to LICENSE.txt.