Generate Brazilian CPF strings with consistent check digits for isolated software tests, with or without punctuation.
Generate 1–20 unique strings per batch for Brazilian CPF field testing. Weighted modulo-11 check digits provide mathematical consistency, without proving registration, identity, or that a number is unused.
Choose quantity and format, click Generate, then copy a value or the list. Changing format preserves values; changing quantity clears them. Shared links restore settings only.
For isolated software tests only. Generated numbers can coincide with real registrations. Do not use them to impersonate anyone or register in production services.
Choose 1–20 values per batch.
Click Generate to create test inputs.
This tool generates values locally in your browser and does not send or store generated results. Values remain only in this page until cleared or reloaded.
Share settings only: quantity and format. Generated values stay out of the link. Opening a shared link shows no results until Generate is clicked.
It calculates two modulo-11 check digits for nine random digits. This tests mathematical structure, not official registration.
No. A random value can match a real Brazilian CPF registration. No identity or registration lookup is performed.
Only in isolated development and QA environments. Do not use them to create production accounts or impersonate people.
No. Switching punctuation redisplays the same values and changes how they are copied.
No. Only quantity and format are shared; recipients must click Generate to create their own results.
This tool keeps results only in page memory. It does not add them to links, storage, favorites, analytics, or network requests.
Algorithm documentation and the separate official registration service; neither endorses this tool.