Aadhaar Masker

Upload a PDF and we'll auto-detect every Aadhaar number on it and mask the first 8 digits with black rectangles. Useful when sharing KYC documents, rental agreements or applications with offices, banks or recruiters who shouldn't see your full Aadhaar.

🔒 Your PDF never leaves the browser. All processing happens locally on your device.

Why mask your Aadhaar?

UIDAI itself recommends sharing a masked Aadhaar (only the last 4 digits visible) for any non-mandatory verification. The full 12-digit number plus your photo can be used to commit identity fraud — open SIM cards, bank accounts, even loans. The masked Aadhaar reveals only the last 4 digits, which is enough to identify the document but not enough to clone your identity.

How this tool works

Text-based PDFs: we extract the text layer, find 12-digit numbers matching the Aadhaar format, validate them with the Verhoeff checksum to filter out random IDs, and overlay black rectangles on the first 8 digits.
Scanned PDFs (image-only): the auto-detect won't find text positions. The tool falls back to letting you draw rectangles manually over the Aadhaar area on each page.
The output is a new PDF with the masking baked in — not just a visual overlay. Even if the recipient tries to copy the text, they get the masked version.

When NOT to mask

Banks and govt agencies that legally require the full Aadhaar (Section 7 of the Aadhaar Act). Examples: PAN-Aadhaar linking, EPFO, IT department.
Aadhaar enabled payment system (AEPS) transactions.
e-KYC for SIM cards, demat accounts, mutual funds.

For everything else — landlord ID proof, hostel admission, hotel check-in, courier delivery, school enrolment — the masked Aadhaar is sufficient and safer.