Sanitize Before
You Prompt
Permanently redact PDFs, Word documents, Excel sheets & scanned images 100% offline. De-identify sensitive data before sharing with ChatGPT, Claude, Copilot, Gemini & other LLMs.
Air-gapped desktop security for legal teams, compliance officers, HR, healthcare, and developers. Zero cloud uploads. Zero telemetry. No subscription lock-in.
Why Sanitize Data Before AI Prompts?
// Sanitized with PII Shield (Pseudonymized & Zero Leakage):
"Please summarize this legal settlement dispute for client [PERSON_1] (SSN: [GOV_ID_1], email: [EMAIL_1]). The settlement agreement of [SETTLEMENT_AMOUNT_1] with [ORG_1] covers clinic license [LICENSE_1]."
Context Preservation
Synthetic labels maintain grammatical structure so AI models retain 100% reasoning accuracy.
Local GLiNER NER
State-of-the-art zero-shot Named Entity Recognition detects names, IDs, dates, and organizations offline.
Total Regulatory Shield
Comply with HIPAA Safe Harbor, GDPR, CCPA, and DPDP rules without hindering your AI adoption.
What is PII Shield and How Does Offline Redaction Work?
PII Shield is a native desktop security tool for Windows 10 & 11 designed to detect, redact, and pseudonymize Personally Identifiable Information (PII) 100% offline before sharing text, PDFs, spreadsheets, or documents with AI models such as ChatGPT, Claude, Copilot, Gemini, and other LLMs.
1. Permanent Vector Redaction
Unlike visual overlay boxes, PII Shield permanently strips text vectors, fonts, and metadata streams from PDFs, preventing data recovery through copy-paste or extraction scripts.
2. LLM Context Preservation
Uses context-preserving pseudonymization (e.g. [PERSON_1], [ORG_1]) so AI reasoning models maintain 100% syntactic understanding without seeing raw private identities.
3. Local Machine Learning
Powered by local GLiNER zero-shot entity extraction and EasyOCR with zero cloud roundtrips, zero telemetry, and full air-gap compliance (HIPAA, GDPR, CCPA).
Built For Those Who Cannot Afford A Leak
From solo law practices and independent accounting firms to enterprise data protection officers, PII Shield gives professionals the confidence to redact documents locally without trusting third-party cloud uploaders.
Attorneys & Law Firms
Sanitize pleadings, discovery disclosures, evidentiary exhibits, and settlement agreements. Permanently destroy metadata and underlying text before filing.
Healthcare & Researchers
De-identify clinical trials, case studies, patient notes, and diagnostic records in accordance with HIPAA Safe Harbor and ethical review guidelines.
HR, Finance & Operations
Anonymize resumes, employee background checks, payroll spreadsheets, invoices, and bank statements before circulating with external stakeholders.
See PII Shield in Action
Inspect the native Windows desktop interface
PDF Document Redaction
Permanent black-bar redaction that strips underlying text and metadata layers with pixel precision.
Multi-Format Workflows
Permanent, format-preserving redaction across everyday file types
PDF Documents
Permanent black-bar redaction. Automatically strips vector layers and hidden metadata so text cannot be copied or selected.
Word Documents
Run-level XML redaction. Preserves full document formatting, bullet points, headers, footers, and table geometries.
Spreadsheets
Column-hint heuristic detection and cell-level de-identification for thousands of customer rows in seconds.
Scanned Images
Built-in EasyOCR engine with automated deskew, rotation correction, and interactive canvas rectangle drawing.
100% Local & Private By Design
PII Shield is built with Tauri v2 and a dedicated local Python sidecar. All machine learning inference (GLiNER for zero-shot entity extraction, EasyOCR, ONNX Runtime) runs in your physical system memory.
- ✔ Zero cloud endpoints · Zero network requests
- ✔ No telemetry or analytics trackers embedded
- ✔ No account registration or login required
- ✔ Permissive, clean architecture (No AGPL obligations)
Regulatory Compliance Standards
PII Shield vs. Cloud Services
Why a native desktop app beats cloud redaction web tools
| Feature | PII Shield (Windows) | Standard Cloud Redactors |
|---|---|---|
| Document Processing | 100% Offline (Local CPU/GPU) | Uploaded to remote cloud servers |
| Data Breach Risk | Zero (Never leaves device) | High (Third-party data storage) |
| Pricing Model | $2.49 One-Time Purchase | $20 - $50 / month subscription |
| AI/LLM Pseudonymization | Yes (Context-preserving labels) | Rarely supported (black bars only) |
| Batch Folder Redaction | Yes (Unlimited files locally) | Metered per-page credits |
Frequently Asked Questions
Technical Specifications & Declarations
Transparent software declarations, licenses, and architecture docs:
Ready to Secure Your Documents & AI Prompts?
Download PII Shield from the Microsoft Store today. Instant offline processing for PDFs, Word, Excel, and images.