Zero-Trust Document Redactor — AI Privacy Shield

What Is the Zero-Trust Document Redactor?

The Zero-Trust Document Redactor is a free, AI-powered, serverless privacy tool that automatically detects and redacts sensitive information from documents. It uses advanced Named Entity Recognition (NER) AI models running directly in your browser combined with intelligent pattern matching to find and black out personal names, phone numbers, email addresses, financial amounts, ID numbers, and more.

Unlike cloud-based redaction tools that upload your documents to remote servers, this tool provides instant, AI-driven privacy protection with zero data exposure — your documents never leave your device. It is designed for lawyers, HR professionals, healthcare workers, and anyone who handles sensitive documents.

AI-Powered Privacy Features

• 🤖 AI Named Entity Recognition — uses a BERT-based NER model (Xenova/bert-base-NER) via Transformers.js to intelligently detect personal names, organization names, and locations in text
• 📞 Smart Pattern Detection — regex-based detection of phone numbers, email addresses, financial amounts (with currency symbols), SSN/ID numbers, dates, and custom patterns
• 📄 PDF & Image Redaction — upload PDFs or images and detect sensitive data via OCR (Tesseract.js). Supports bulk processing with automatic detection across all pages/images
• 🎯 Hybrid Detection Engine — combines AI NER for context-aware entity detection with pattern matching for structured data, providing the most comprehensive PII detection
• ⚙️ Collapsible Configuration Panels — Detection Options and Advanced Options panels collapse/expand for a streamlined interface. Keep the workspace clean while accessing all settings
• 🔍 Before/After View — switch between redacted and original views using tabs to verify what was detected
• 📊 CSV Redaction Reports — export detailed CSV reports listing every detected entity, its type, confidence score, and position. Perfect for audit trails and compliance documentation
• 📦 Bulk Processing — upload multiple PDFs or images and process them all at once. Download results as a ZIP archive
• 🎨 Color-Coded Legend — each entity type is color-coded (names in red, orgs in purple, phones in teal, emails in dark, amounts in green, IDs in orange, dates in amber) with a visual legend strip for quick reference
• 💡 Hover Preview — hover over any redacted block to see what type of entity was detected
• 100% Private — all AI processing happens in your browser; no data transmission occurs
• ✈️ Works Offline — after the initial model download (~165MB), the model is cached and works without internet
• Free Forever — no premium tier, no usage limits, no hidden costs

How AI Document Redaction Works — Step-by-Step

1. Choose your mode — select Text, PDF, or Image tab. Drag and drop files or paste text. PDF and Image modes accept multiple files for bulk processing
2. Select the detection categories using the collapsible Detection Options panel — names, phones, emails, amounts, IDs, dates — or expand Advanced Options to add custom words, allowlist, or regex patterns
3. Click Redact / Detect — the AI engine loads a 165MB NER model (cached after first download) and scans your document. For bulk files, use Detect All to process everything automatically
4. The hybrid engine runs AI NER for names/organizations and regex for structured data patterns simultaneously
5. Results appear with color-coded category badges showing the breakdown (e.g., 3 names, 2 phones, 1 email). The color legend strip explains each highlight color
6. Export your results — download redacted text/PDF/images, use Save All (ZIP) for bulk files, or download a CSV redaction report for audit compliance

Why Zero-Trust? The Privacy Promise

We call it "Zero-Trust" because you don't need to trust us — or anyone — with your data. Here is exactly what happens when you use this tool:

• The AI model (BERT NER) downloads once and runs locally in your browser's memory
• Your document text stays in your browser — never transmitted to any server
• PDF files are parsed in your browser — never uploaded anywhere
• No API calls are made to any external service
• No data is stored in any database, cookie, or server-side storage
• You can disconnect from the internet after the first load and the tool still works perfectly

This makes it the ideal tool for handling legally sensitive documents where data protection regulations (GDPR, HIPAA, SOX, CCPA) prohibit uploading to cloud services.

Use Cases by Profession

For Lawyers and Legal Teams

Redact client names, case details, financial settlements, and opposing counsel information from court documents, contracts, depositions, and correspondence before sharing with external parties. Since all processing happens locally, attorney-client privilege is fully preserved. No data is ever transmitted — comply with bar association ethics rules with confidence.

For HR Professionals

Remove employee names, Social Security numbers, salary information, home addresses, and phone numbers from internal documents before sharing with auditors, legal teams, or regulatory bodies. The tool is GDPR-compliant by design — no personal data leaves the browser.

For Healthcare Workers

Redact patient names, medical record numbers, dates of birth, and contact information from clinical notes, discharge summaries, and research documents. Since no data is transmitted, the tool is HIPAA-compliant by design — no protected health information exposure risk.

For Financial Professionals

Black out account numbers, transaction amounts, client names, and routing numbers from bank statements, audit reports, and financial declarations. The tool detects currency amounts in multiple formats including USD, EUR, GBP, SAR, AED, and more.

For Journalists and Researchers

Protect sources by redacting names, contact information, and identifying details from interview transcripts, leaked documents, and research notes before publication or sharing with editors.

For Government and Public Sector

Comply with FOIA (Freedom of Information Act) redaction requirements by automatically detecting and removing personally identifiable information from public records before release.

Supported Entity Types

• Personal Names (AI-powered) — John Smith, Dr. Sarah Johnson, Ahmed Mohammed
• Organization Names (AI-powered) — Acme Corporation, Microsoft, Saudi Aramco
• Location Names (AI-powered) — New York, London, Riyadh
• Phone Numbers (pattern) — +1-555-123-4567, (202) 555-0123, +966-55-123-4567
• Email Addresses (pattern) — john@example.com, hr@company.org
• Financial Amounts (pattern) — $15,750.00, €1,200, 50,000 SAR, £3,500
• ID Numbers (pattern) — SSN (123-45-6789), passport numbers, national IDs
• Dates (optional pattern) — 01/15/2024, March 3, 2025, 2024-01-15
• Custom Patterns — define your own regex for case numbers, medical record numbers, or internal IDs

Free Alternative to Adobe Acrobat, DocuSign, and Cloud Redaction Tools

Compare our free AI Document Redactor with paid alternatives:

• Adobe Acrobat Pro costs $22.99/month, requires desktop installation, and uses manual redaction (select-and-redact). Our tool is free, browser-based, and uses AI-powered automatic detection
• DocuSign Redaction is part of their enterprise plan ($40+/month) and uploads documents to their cloud servers. Our tool never uploads anything
• Blackout by Everlaw costs $80+/user/month for legal teams and requires cloud upload. Our tool provides similar NER-based detection completely free and private
• ChatGPT / Claude cannot safely process confidential documents — your text is sent to their servers for AI processing. Our tool runs AI 100% locally

Tips for Best Redaction Results

1. Enable all detection categories — start with all categories enabled, then selectively disable what you don't need
2. Review the redacted output — always compare the redacted view with the original to ensure nothing was missed
3. Use custom patterns — add regex patterns for domain-specific identifiers like case numbers (e.g., CASE-\d{4}-\d{3})
4. Process PDFs directly — upload the PDF rather than copying text manually to preserve all text from every page
5. Check hover tooltips — hover over redacted blocks to see what type of entity was detected and verify accuracy
6. Download for records — always download the redacted version for your records before sharing
7. Test with sample data — try the tool with example text first to understand how each detection category works
8. Disconnect and test — for maximum security, disconnect from the internet after the AI model loads and verify the tool still works
9. Use the date detection wisely — date detection is off by default since dates may or may not be sensitive depending on context
10. Combine with manual review — AI detection is powerful but not perfect; always perform a final human review of the redacted document before sharing externally