Aadhaar Card Validator

Validate the mathematical structure of any 12-digit Aadhaar number instantly using the Verhoeff algorithm. 100% private and secure.

Enter Aadhaar Number

Status

Aadhaar Card Number Format Validator - Verify Offline

Entering Aadhaar numbers on application forms, employee records, or KYC systems can easily result in typos. Our online Aadhaar Card Validator checks whether a 12-digit number is mathematically valid, helping you identify typing mistakes instantly.

The verification relies on the Verhoeff algorithm, a checksum formula that detects single-digit errors and digit transposition mistakes.

Key Reference & Specifications Table

Aadhaar FormatNumber of DigitsValidation AlgorithmSecurity Status
Standard Aadhaar12 DigitsVerhoeff ChecksumProcessed locally in browser
Format PatternXXXX XXXX XXXXRegular Expression check100% Secure
VerificationOffline MathematicsDihedral D5 matrix checkingNo data saved

How to Use the Online Aadhaar Card Validator

  1. Locate the 12-digit Aadhaar number on your physical card.
  2. Enter the 12 digits in the validator input field (do not add spaces).
  3. The validator checks the length and computes the Verhoeff matrix algorithm.
  4. View the validation result (Valid or Invalid) instantly.

Frequently Asked Questions (FAQs)

Does this tool verify my Aadhaar with the UIDAI government database?

No. This tool checks the mathematical structure and checksum validity offline to identify typing mistakes. It does not connect to the government database, ensuring absolute privacy.

What is the Verhoeff algorithm used in Aadhaar validation?

The Verhoeff algorithm is a checksum method developed by mathematician Jacobus Verhoeff that detects transcription errors using a dihedral group of order 10.

Why does my valid Aadhaar card show as invalid?

Make sure you have typed exactly 12 digits without any spaces, letters, or special characters. Double-check if you misread any numbers on your card.

How can I verify if an Aadhaar is real or fake?

To check if an Aadhaar is active and exists, use the official UIDAI portal (myaadhaar.uidai.gov.in) under the 'Verify an Aadhaar Number' service.

Is it safe to type my Aadhaar number on this website?

Yes. This tool is built entirely using client-side JavaScript. All checks are processed directly inside your web browser. No data is sent to our servers.

What is Virtual ID (VID) and how does it relate to Aadhaar?

A Virtual ID (VID) is a temporary, revocable 16-digit random number mapped with your Aadhaar number. It can be used instead of Aadhaar for authentication.

How do I check if my Aadhaar is linked to my mobile number?

You can verify your email and mobile number on the UIDAI portal by entering your Aadhaar and receiving an OTP.

What is the structure of an Aadhaar card number?

It consists of 12 digits: the first 11 digits are the unique identification digits, and the 12th digit is the Verhoeff checksum digit.

Can I validate Aadhaar numbers in bulk?

Currently, our tool supports single-entry validation for safety and instant response as you type.

What should I do if a candidate's Aadhaar fails the validator check?

Ask the candidate to double-check their Aadhaar card and re-type the 12 digits carefully without transposing any numbers.