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RENAVAM Validator

Validate Brazilian vehicle registration (RENAVAM) check digit. 100% free and browser-based.

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Enter the 11-digit RENAVAM number

The result will appear here

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RENAVAM - What It Is and How to Validate

Online RENAVAM Validator - Free and Instant

Our free online renavam validator performs instant validation using the official algorithm. Simply enter the number, click the button, and get an immediate result indicating whether the document number is valid or invalid. The validation checks digit verification, format correctness, and known invalid patterns to ensure accuracy.

Key Features

  • Instant validation using the official algorithm published by the Brazilian government
  • Support for both formatted and unformatted input
  • Detection of known invalid sequences and repeated digit patterns
  • Complete privacy with all processing done in your browser
  • Mobile-friendly responsive interface that works on any device
  • No registration or API key required for unlimited use

The validation algorithm follows the official specification published by the Brazilian government. The tool checks not only the mathematical validity of the check digits but also rejects commonly used test numbers and sequences of repeated digits that, while mathematically valid, are not real document numbers in use.

This tool runs entirely in your browser using JavaScript and no data is transmitted to any server, ensuring complete privacy and security for sensitive document numbers. It works offline once the page is loaded and provides instant feedback as you type your input.

Whether you are a developer testing form validation logic, an accountant verifying client documents, or simply need to check a number quickly, this free tool saves time and eliminates manual calculation errors. Combine it with our generator tools for comprehensive testing workflows.

Frequently Asked Questions

What is RENAVAM?
RENAVAM (Registro Nacional de Veiculos Automotores) is an 11-digit code assigned to each motor vehicle registered in Brazil.
Where can I find the RENAVAM number?
The RENAVAM is printed on the vehicle registration document (CRLV) and can also be found on traffic tickets and DPVAT certificates.
What information is encoded in the RENAVAM number?
The RENAVAM (Registro Nacional de Veículos Automotores) is an 11-digit number assigned by DENATRAN to each vehicle registered in Brazil. The last digit is a check digit calculated using modular arithmetic, which this tool validates.