Aadhaar Masking — UIDAI Compliant Redaction
Automatically mask Aadhaar numbers (12-digit UID) in PDFs for UIDAI compliance. Bank KYC, loan applications, ID proofs. Free, private, in-browser.
About Aadhaar Masking
Mask Aadhaar card numbers in PDFs to comply with UIDAI guidelines — showing only the last 4 digits of the 12-digit number. PDF AI Tools automatically detects and masks Aadhaar numbers across multi-page PDFs using pattern recognition.
UIDAI mandates that entities storing Aadhaar data must mask the first 8 digits. PDF AI Tools automates this with a single upload — no manual redaction required, no risk of missing occurrences across multiple pages.
How to Use Aadhaar Masking — UIDAI Compliant Redaction
- Step 1: Upload the PDF containing Aadhaar numbers
- Step 2: Tool detects all occurrences automatically
- Step 3: Review detected instances in the preview
- Step 4: Click Apply Masking and download the compliant PDF
Key Features
- Auto-detects all Aadhaar number patterns in the document
- Masks first 8 digits, shows last 4 (XXXX-XXXX-1234)
- Works across multi-page PDFs
- Handles both digital and scanned documents (with OCR)
- Creates permanent masking in PDF structure
- UIDAI-compliant format
- Browser-based — Aadhaar data never transmitted
- Audit log of masked occurrences
How We Compare
Compared to desktop alternatives like Adobe Acrobat Pro (starting at $19.99/month), Smallpdf ($12/month for unlimited), or iLovePDF ($9/month Premium), PDF AI Tools delivers comparable quality at $0 for the core feature set. We skip the subscription friction by processing most operations directly in your browser with WebAssembly — no server infrastructure costs to pass on to users. Our AI features (summarization, chat, OCR) use a pay-as-you-go backend that keeps your total cost well under $5/month even for power users.
Frequently Asked Questions
Is this masking permanent?
Yes — the masking removes the digits from the PDF content stream, not as a removable annotation.
Does it handle Aadhaar numbers in different formats?
Yes — the pattern matcher handles space-separated (XXXX XXXX XXXX) and hyphen-separated (XXXX-XXXX-XXXX) formats.
Is this compliant with UIDAI's data localization requirements?
Browser-side processing means no Aadhaar data is transmitted to any server, meeting data minimization requirements.
Does it work on scanned KYC documents?
Yes — OCR is applied first to identify Aadhaar numbers in scanned images.
Who Uses This Tool
- Mask Aadhaar numbers before sharing KYC documents externally
- Comply with UIDAI masking requirements for stored documents
- Prepare employee onboarding documents for HR archives
- Mask Aadhaar in loan application documents before third-party review