Updated 27 October 2026
Quick answer: Before you send a copy of your Aadhaar, PAN, passport or driving licence to a landlord, hotel, employer, courier or app, hide what they don't need and mark the copy for one purpose. For Aadhaar, cover the first 8 digits so only the last 4 show (this is what UIDAI's own "masked Aadhaar" does), and add a line such as "For KYC at ABC Bank only, 27 Oct 2026" across the image. The free tool below does both on your phone, then saves a flattened JPG or PDF in which the hidden numbers are actually gone, not just covered by a layer.
Photocopies and phone photos of ID cards are collected everywhere in India, and they are stored in email inboxes, shared drives and WhatsApp chats for years. A full Aadhaar number with your photo, date of birth and address is enough for many kinds of identity fraud, from fake SIM cards to loan applications in your name. Most people asking for a copy only need to see your name and photo, or confirm that a valid ID exists.
Drag across anything you want hidden: a black box covers it. For an Aadhaar card, cover the first 8 digits of the number (keep the last 4), plus the QR code if you don't want your details read from it.
Your document never leaves this device. Saved pages are flattened into images, so hidden numbers cannot be uncovered or copied from the file.
What to Hide on Each Document
| Document | Usually hide | Usually leave visible |
|---|---|---|
| Aadhaar | First 8 digits of the number; the QR code if the receiver doesn't need to scan it; the address if it isn't needed | Last 4 digits, name, photo, year of birth |
| PAN card | Date of birth, father's name, signature, and part of the PAN when it is only proof of identity | Name, photo |
| Passport | Passport number (except for travel and visa use), signature, the machine-readable lines at the bottom | Name, photo, nationality |
| Driving licence | Licence number, address, date of birth | Name, photo, vehicle classes |
| Bank cheque or statement | Account number except the last 4, balances, other transactions | Name, bank and IFSC if they need it to pay you |
For genuine KYC with a bank, insurer, broker or employer's payroll, the organisation may be legally required to see the full number. Share it there if needed, but still add a watermark naming them, and prefer their official app or portal over email or chat.
How to Mask a Document With the Tool
- Take a clear photo of the card on a dark surface, or open the PDF (several pages are fine).
- Drag across each part you want hidden; a solid black (or white) box covers it. Use Undo to fix a box.
- Type a watermark: who it is for, the purpose and the date.
- Download the PDF (all pages) or a JPG of the current page, and check the result before sending.
The saved file is a new image of each page, so hidden text cannot be selected, copied or recovered from underneath the boxes. That matters: drawing a black rectangle over a PDF in many editors only adds a layer on top, and the original numbers can still be copied out.
Masked Aadhaar From UIDAI
UIDAI offers an official masked e-Aadhaar that shows only the last four digits of the number. Download it from the myAadhaar portal: sign in with your Aadhaar number and the OTP sent to your registered mobile, choose Download Aadhaar and tick the option for a masked Aadhaar. The PDF is password-protected; the password is the first four letters of your name in capital letters followed by your year of birth (for example, RAVI1990). The masked version is accepted by many organisations that only need to verify identity, though not where the law requires the full number.
If you only have a photo of your physical card, mask it with the tool above. To open the official PDF in the tool, first open it with the password and save or print a copy without one.
Other Ways to Protect Your Aadhaar
- Lock your biometrics in the myAadhaar portal or the mAadhaar app, so your fingerprints and iris can't be used for authentication until you unlock them.
- Check your authentication history in myAadhaar to see where and when your Aadhaar was used.
- Use the Virtual ID (VID), a temporary 16-digit number linked to your Aadhaar, where services accept it instead of the Aadhaar number.
- Never share OTPs. No genuine bank, telecom company or government office asks for an Aadhaar OTP over a phone call.
- Delete old copies from chats and email once a purpose is over.
Frequently Asked Questions
Is it legal to share a masked Aadhaar?
Yes. UIDAI itself provides a masked Aadhaar showing only the last four digits, and many organisations accept it. Where a law requires the full Aadhaar number for KYC, the organisation can ask for it.
Which digits should I hide on my Aadhaar?
The first 8 of the 12 digits, leaving the last 4 visible, the same as the official masked Aadhaar. Hide the QR code too if you don't want your details to be read from it, but note that some offices scan the QR to verify the card.
Is my document uploaded when I use this tool?
No. The photo or PDF is opened and changed inside your browser, on your device. Nothing is sent to Blog Digest or anyone else.
Can someone remove the black boxes from the saved PDF?
No. The tool saves each page as a flat image with the boxes and watermark burned in. There is no hidden text layer underneath to recover.
What should I write in the watermark?
Who it is for, the purpose and the date, for example "For rental agreement with R. Mehta only, 27 Oct 2026". If a copy is misused, the watermark shows where it came from and makes it useless for other purposes.
Sources
- UIDAI: Unique Identification Authority of India
- myAadhaar portal: download masked Aadhaar, lock biometrics
Related Guides
- Merge, Split and Reorder PDFs Free Without Uploading Them (No Daily Limit)
- How to Sign a PDF for Free Without an Account (No 3-Document Limit)
- Exam Photo and Signature Resizer: Exact KB and Pixel Sizes for SSC, UPSC, IBPS and NEET Forms
- Strong Password and Passphrase Generator, Plus a Safe Breach Check
- Free Online Tools That Don't Upload Your Files, Make You Sign Up or Add Watermarks
Steps for the myAadhaar portal as of October 2026; menu names can change. This is general guidance, not legal advice.
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