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Voter ID Validator

Validate Brazilian voter ID (Título de Eleitor) check digits. Identifies origin state. 100% free.

No sign-up 100% free Private

Enter the 12-digit voter registration number

The result will appear here

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Voter Registration - How to Validate

Online Voter ID Validator - Free and Instant

Our free online voter id 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

How is the voter registration structured?
12 digits: sequential number (1-8), state code (9-10), and two check digits (11-12) using Modulo 11.
What does the state code in the voter ID indicate?
Digits 9-10 encode the state (UF) where the voter was registered. Each state has a specific code defined by the TSE (Superior Electoral Court).
What do the sequential digits in a voter ID number mean?
The voter ID number (Título de Eleitor) contains digits that encode the state of registration and the electoral zone. The two check digits at the end are calculated using a modular arithmetic algorithm defined by the TSE.