RG Generator

What is an RG generator used for?

The RG (General Registry) is the identity card issued by Brazilian states. Since the format changes from state to state, here we follow the São Paulo standard (SSP/SP): 8 base digits plus 1 check digit, which may turn out to be an X.

It comes in handy when you need to populate test registrations in systems that require an RG without reaching for real people's data.

For testing and development use only.

Understanding the Brazilian RG

The RG — Registro Geral, also known as Carteira de Identidade, is Brazil's traditional identity card. Unlike the CPF (federal), the RG is issued by each state's Secretaria de Segurança Pública (SSP), so there is no single national algorithm: every state has its own numbering scheme, its own check-digit rules — and often no check digit at all. This is why a Brazilian can legally hold one RG per state and why so much fraud-prevention logic ends up reading the CPF instead.

A patchwork of formats

• São Paulo (SSP-SP) — 8 digits plus a check digit (XX.XXX.XXX-D) computed with modulo 11 and weights 2 through 9. When the result is 10 the DV is written as X.
• Paraná — 8 digits with check digit, similar modulo-11 logic.
• Minas Gerais — printed as MG-XX.XXX.XXX with a state prefix; the numbering pool follows internal SSP-MG rules.
• Rio de Janeiro, Bahia and most other states — sequential numbering with or without a check digit; the issuing office is identified by the SSP-UF abbreviation on the card.

Legal frame: Lei nº 7.116/1983 standardized validity and design, and Decreto nº 9.278/2018 mandated higher-security models with biometric data and machine-readable zones.

The transition to CIN

In 2023 Brazil rolled out the CIN — Carteira de Identidade Nacional, which is gradually replacing the state-issued RG. The CIN uses the CPF as the single national identifier, adopts the ICAO 9303 machine-readable layout used by passports, embeds biometrics in a chip and carries an explicit expiration date (5 years for minors, 10 for adults, indefinite from age 60). The legacy RG cards remain valid until 2032, after which only CIN will be accepted.