Aadhaar Masking Guide – How to Mask Aadhaar Card Number
UIDAI recommends sharing only the last 4 digits of your Aadhaar. This guide explains how to mask your Aadhaar number, why it matters, and what formats are accepted for KYC.
Mask your Aadhaar number instantly — UIDAI-compliant XXXX XXXX 1234 format.
Open Aadhaar Masker →What is Aadhaar Masking?
Aadhaar masking replaces the first 8 digits of a 12-digit Aadhaar number with X or # characters, showing only the last 4 digits. Example: 1234 5678 9012 → XXXX XXXX 9012.
UIDAI introduced this in 2018 to prevent misuse of Aadhaar numbers. A masked Aadhaar is a valid identity proof accepted by banks, insurance companies and telecom operators.
When to Use Masked Aadhaar
- Bank account KYC updates
- Insurance policy applications
- Mobile SIM registration
- Rental agreements
- Any form where you are asked to submit a photocopy of Aadhaar
Accepted Formats
- XXXX XXXX 9012 — most common, accepted by all entities
- #### #### 9012 — hash format, also accepted
- Masked Aadhaar PDF from uidai.gov.in — digitally signed, most authoritative
How to Get Official Masked Aadhaar from UIDAI
- Go to uidai.gov.in → Download Aadhaar.
- Log in with your Aadhaar number and OTP.
- Check the option "Masked Aadhaar" before downloading.
- The downloaded PDF shows only last 4 digits and carries UIDAI's digital signature.
Frequently Asked Questions
Sharing the full 12-digit Aadhaar exposes it to identity theft. UIDAI guidelines say only the last 4 digits should be displayed. Masked Aadhaar (XXXX XXXX 1234) is accepted for KYC by all regulated entities.
Yes. As per UIDAI circulars, masked Aadhaar is a valid KYC document for banks (RBI-regulated), insurance (IRDAI), and telecom (TRAI). Entities cannot legally demand the full 12-digit number.
No. All processing happens in your browser using JavaScript. Your Aadhaar number never leaves your device. There is no backend server or database.