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PDF Privacy Masking

100% Local Processing | AI Privacy Detection | No Server Upload

Local Security Zone Active (Offline Safe)

Your documents never leave your browser. Even developers cannot see them.

Drag & Drop PDF or Click to Upload

AI automatically detects personal information and provides a security score

No Server Upload โ€ข 100% Safe

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What is PDF Privacy Masking?

A free online security tool that uses AI to automatically detect and mask (redact) personal information in PDF documents. Detects Korean Social Security Numbers (13-digit format), phone numbers, email addresses, and Korean residential addresses using regex-based pattern matching. All processing runs 100% locally in your browser โ€” files are never sent to a server, and no one, including developers, can access your documents. Ideal for government agencies, corporate security teams, law firms, and hospitals that must comply with privacy regulations such as GDPR and the Korean Personal Information Protection Act. AI detection results can be individually reviewed and toggled, giving you precise control over which information gets redacted.

Common Use Cases

๐Ÿ›๏ธ
Government Document Processing
Safely mask personal information in sensitive administrative documents without any server upload. Maintain compliance with personal data protection laws while improving processing efficiency.
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Corporate Security Essential
Process PDFs containing sensitive data โ€” contracts, HR records, customer information โ€” entirely on your local machine to eliminate data breach risks. No network traffic is generated, so DLP tools won't flag the activity.
โš–๏ธ
Legal Document Editing
Lawyers and law firms can safely redact client information before submitting documents to courts or opposing counsel. Meets GDPR and privacy law requirements with fully local processing.
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100% Privacy Guaranteed
All processing completes inside your browser. Files never leave your device โ€” not even to the tool's developers. Fully safe for classified and confidential documents.

How to Use

  1. 1
    1. Upload PDF
    Drag and drop your PDF or click the upload area to select a file. The file is loaded only into browser memory and is never transmitted to a server.
  2. 2
    2. AI Security Analysis
    AI extracts text from each page and automatically detects SSN, phone number, email, and address patterns. A security score (0โ€“100) and a full list of detected items are displayed.
  3. 3
    3. Select Items to Mask
    Review the detected information list and toggle each item individually to mask or reveal it. Use the "Mask All" or "Show All" buttons for quick bulk actions.
  4. 4
    4. Download Secured PDF
    Download the security-processed PDF with all selected items covered by solid black boxes. The original file is unchanged โ€” only the redacted copy is generated and saved.

Frequently Asked Questions

๐Ÿ›ก๏ธ Security Disclaimer

This service performs 100% local computation and no one, including developers, can see your files. All processing happens only in your browser memory, and no data is sent to external servers. However, as AI detection may not perfectly find all personal information, we recommend final review for critical documents.