Your Aadhaar number is requested everywhere — hotels, gas connections, coaching centres, rental agreements. But handing over the full 12-digit number (and a clear copy of the card) is a real identity-theft risk. UIDAI's own guidance is to share a masked Aadhaar wherever a full one isn't strictly required.
Quick answer
- A masked Aadhaar hides the first 8 digits and shows only the last 4.
- Share it anywhere the full number isn't legally required — hotels, landlords, coaching/admission desks.
- Mask any copy free with the Aadhaar masking tool — the black box is burned into the image and nothing is uploaded.
What is a masked Aadhaar?
A masked Aadhaar hides the first 8 digits of your Aadhaar number and shows only the last 4 — enough to identify the document to you, without exposing the full number. UIDAI offers a masked download on its site, and many verification flows now accept the masked version.
When you can share a masked Aadhaar
- Address or identity proof where the full number isn't legally mandated.
- Hotels, private offices, coaching/admission desks, landlords.
- Any time you're emailing or messaging a copy of the card.
Some government and banking (KYC) processes still require the full number — follow the specific instruction there. When in doubt, mask it; you can always share the full one if explicitly required.
Full vs. masked Aadhaar: when each is accepted
| Situation | Which version |
|---|---|
| Bank KYC (account opening, credit card) | Full Aadhaar |
| e-KYC / OTP-based verification | Full number required for OTP |
| Government portal identity verification | Follow the portal's own instruction |
| Hotels and hostels (mandatory guest registration) | Masked Aadhaar accepted |
| Coaching institutes and exam admission desks | Masked Aadhaar accepted |
| Private landlord or rental agreements | Masked Aadhaar accepted |
| Sharing via email or messaging apps | Masked Aadhaar — never share the full card |
How to mask your Aadhaar yourself (free, private)
You don't need to wait for the UIDAI download — you can mask any copy you already have in seconds:
- Open the Aadhaar masking tool and upload your Aadhaar image.
- Drag a black box over the first 8 digits of the number (and anything else you want hidden).
- Download the masked copy.
Two things make this safe: the black box is burned into the image pixels — it can't be peeled off or recovered — and the whole thing runs in your browser, so your Aadhaar is never uploaded to any server. That matters for a document this sensitive.
A few extra precautions
- Mask the QR code too if you don't want it scanned — it encodes your details.
- Share over secure channels; avoid public/unknown upload sites.
- If a PDF is password-protected (like e-Aadhaar), open it with the e-Aadhaar password first, then mask a screenshot.
- If the form caps the upload size, see how to compress a PDF to an exact KB target after masking — the file stays on your device throughout.
- Need to extract details from your Aadhaar card? The Aadhaar OCR tool reads the number, name, DOB and address from a card photo — entirely in your browser, nothing uploaded.
Frequently asked questions
Is a masked Aadhaar valid as ID proof?
For many private and KYC-light purposes, yes — UIDAI itself promotes masked Aadhaar to limit exposure. Some banking and government KYC still need the full number, so follow the specific instruction; whenever it isn't mandated, share the masked version.
Which digits does Aadhaar masking hide?
The first 8 of the 12-digit number. Only the last 4 stay visible — enough to identify the document to you without exposing the full number.
Can the black box be removed from a masked copy?
No. The masking tool burns the black box into the image pixels, so it can't be peeled off or recovered — unlike a highlight or box added in some PDF editors, which can be deleted.
Is it safe to mask my Aadhaar online?
With this tool, yes — it runs entirely in your browser and your Aadhaar is never uploaded to any server. Avoid tools that upload your document to a server to mask it.