Brazilian ID Card Validator (RG)
Validate Brazilian ID cards (RG) instantly using the official São Paulo algorithm. Free tool for forms, systems, and development. Local validation, no registration, immediate results. Accepts formatting and X check digit.
ID Card Validator (RG)
Enter a Brazilian ID card (RG) to check if it's valid (São Paulo standard)
About the RG Validator
Professional tool that validates Brazilian ID cards (RG) using the official mathematical algorithm from São Paulo state, which is the most widely used standard in Brazil. Instant and local validation of the check digit, no data sent to servers. Ideal for forms, systems, and application development.
Why use our tool?
- ✓Official São Paulo algorithm
- ✓Accepts any RG format
- ✓Instant validation
- ✓100% local processing
How to use
- • Enter the complete RG (9 characters: 8 digits + 1 check digit)
- • Works with or without formatting (12.345.678-9 or 123456789)
- • The check digit can be a number or the letter X
- • Validate RGs before using in forms
⚠️ Warning: Each Brazilian state has its own RG format. This tool validates the São Paulo standard, which is the most common. Other states may have different formats and will not be correctly validated by this tool.
ℹ️ Important: Validation is performed locally in your browser using the official mathematical algorithm. No data is sent to our servers, ensuring complete privacy and security.