CNPJ Validator
Validate CNPJs instantly using the official Brazilian Federal Revenue algorithm. Free tool for forms, systems, and development. Local validation, no registration, immediate results.
CNPJ Validator
Enter a CNPJ to check if it's valid
About the CNPJ Validator
Professional tool that validates CNPJs using the official Brazilian Federal Revenue algorithm. Instant and local validation, no data sent to servers. Ideal for forms, systems, and business application development.
Why use our tool?
- ✓Official Brazilian Federal Revenue algorithm
- ✓Accepts any CNPJ format
- ✓Instant validation
- ✓100% local processing
How to use
- • Enter the complete CNPJ (14 digits)
- • Works with or without formatting (12.345.678/0001-90 or 12345678000190)
- • Validate CNPJs before using in forms
- • Use only for legitimate validation
ℹ️ Important: Validation is performed locally in your browser. No data is sent to our servers, ensuring complete privacy and security.