Tech Bichar

Aadhaar Checksum (Verhoeff)

Check the Verhoeff checksum of a 12-digit number. This is not a UIDAI service and does not verify identity.

Disclaimer: Not a UIDAI service. We only run the Verhoeff checksum. A pass does not mean the number is issued, active or linked. Do not use this for KYC.

How to check an Aadhaar checksum

  1. Enter 12 digits.
  2. See whether the Verhoeff checksum passes.
  3. Remember: this does not prove the number is issued or active.

Frequently asked questions

Is this official UIDAI?

No. We never contact UIDAI. A pass only means the digits satisfy Verhoeff.

Do you store numbers?

No. They never leave the page.

Can I download Aadhaar data?

No, and you should not try.

Why offer this?

To catch typing mistakes before you paste a number into a form you already trust.

Disclaimer?

Not for KYC, not proof of identity, not a UIDAI enrolment or eKYC tool.

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