🪪 Aadhaar Format Validator

Verify if an Aadhaar number's checksum is valid. Uses the Verhoeff algorithm — the same check UIDAI uses internally. Pure client-side. Nothing is sent to any server.

🔒 Privacy notice: This tool runs entirely in your browser. No request is made to UIDAI or any third party. Your Aadhaar number is never transmitted, logged, or stored. We do not (and cannot) lookup demographic / biometric details — that requires UIDAI authentication APIs which strictly need consent and registered AUAs.

Enter 12-digit Aadhaar number