CPF Generator

The CPF Generator creates mathematically valid CPF numbers — with correct check digits — for exclusive use in software development and testing. When building applications that accept CPF as input, developers need algorithm-valid numbers to test forms, validations, API integrations, and registration flows, without using real people's data.

To use it, choose the desired quantity (up to 100 at a time) and whether you want the masked format (XXX.XXX.XXX-XX) or unformatted digits only. Each CPF can be copied individually or you can copy all at once. The numbers are generated using browser-side randomization and the check digits are calculated using the same algorithm as the Brazilian Federal Revenue Service (Receita Federal).

It is important to be clear: the CPFs generated are valid only in terms of the check digit algorithm. They are not linked to any real person and must not be used for any purpose other than software testing — such as filling out official forms, opening accounts, or any act that would constitute misuse of an identification document.

Legitimate use cases: populating development and staging databases with fictitious data, testing CPF validators in forms, building fixtures for automated tests, and verifying that an integration with an external system correctly handles CPFs in the expected format. Everything happens in the browser, with no data sent to external servers.