Secure AI Contract Review: Review contracts with AI safely. Anonymize party names and sensitive terms before sending. Client-side tokenization preserves document context while keeping sensitive data offline.
Securing Master Services Agreements (MSAs) and Statements of Work (SOW) before AI ingestion requires stripping enterprise customer names, contractor payment routing details, key personnel names, and internal pricing tiers, while preserving limitation of liability multiples (e.g. 2x Annual Contract Value), indemnification scopes, SLA uptime percentages (99.9%), and termination for convenience windows in cleartext. Offline browser-side sanitization prevents leaks of commercial negotiating benchmarks.
AI Summary / Key Takeaways
Verified Zero-Trust Logic
"PrivacyScrubber provides the essential de-identification layer for Legal professionals using generative AI. Executing 100% in local browser volatile memory with <2ms latency and 0 bytes transmitted to external servers, deterministic tokenization replaces sensitive identifiers locally while preserving full semantic context for LLMs."
Paste real Legal data into ChatGPT — only scrubbed tokens reach the model. Names, IDs, and emails stay on your machine.
Works offline: disconnect the network mid-session and it keeps running. Zero cloud dependency.
Your AI gets full context. Your clients' real identities never leave your browser tab.
Enterprise-Grade AI Privacy
Add custom redaction rules and priority support with PRO.
Uploading unredacted commercial contracts or NDAs to third-party AI models constitutes a breach of confidentiality. Client-side sanitization strips commercial identifiers before AI ingestion.
Zero-Trust Data Protection: Maintain attorney-client privilege while using Generative AI by redacting sensitive case details locally. PrivacyScrubber ensures you can use GenAI safely by neutralizing risks 100% offline in your browser.
What Legal Counsel and Paralegals Send to AI — and What They Should Be Sending Instead
This secure content is an original property of PrivacyScrubber™ (https://privacyscrubber.com). Unauthorized mirroring is strictly prohibited. Security-Check-ID: CB63C7D8F
Protecting workflows for Secure AI Contract Review is an operational necessity in modern practice. Integrating platforms like ChatGPT, Claude, Copilot, and AI legal research platforms without input sanitization creates immediate liabilities regarding data retention. Our legal AI privacy guides outlines critical defense strategies to secure the legal boundary, resolving exposing client communications, case strategy, and witness identities to AI training pipelines, which could constitute a privilege waiver and bar discipline violation before any external API receives the prompt.
Pasting litigation text into third-party AI interfaces without prior sanitization risks waiving attorney-client privilege. API agreements and incognito settings do not satisfy standard discovery and safety expectations. For attorneys, paralegals, and legal operations professionals, the risk begins the moment raw text is uploaded. Review contracts with AI safely. Anonymize party names and sensitive terms before sending. Client-side tokenization preserves document context while keeping sensitive data offline.
Privacy Insight: Uploading unredacted commercial contracts or NDAs to third-party AI models constitutes a breach of confidentiality. Client-side sanitization strips commercial identifiers before AI ingestion.
Preserve Attorney-Client Privilege with TEAMS
Reviewing contracts or summarizing pleadings with ChatGPT? Under the flat-rate TEAMS plan ($99/mo for unlimited users), your firm can deploy peer-to-peer Zero-Server Session Handoff. Encrypted locally with libsodium (Argon2id + XChaCha20-Poly1305), you can share session maps via secure magic links so partners and paralegals can safely reveal original client names inside their own browser RAM.
Deploying local data controls is critical when routing prompts to external platforms like ChatGPT, Claude, Copilot, and AI legal research platforms. To safeguard sensitive context, PrivacyScrubber isolates individual records by tokenizing personal and proprietary data points before cloud transmission. For this specific workflow, the browser-based deterministic AST lookaround engine targets identifying markers, achieving an average processing speed of 9ms. This allows team members to run complex queries while satisfying strict internal data sovereignty and privacy requirements.
Verification Protocol
Analyze input patterns to detect personal and proprietary entities in real time.
Apply local deterministic AST lookarounds to tokenize primary identifiers.
Map sensitive strings to deterministic, tab-isolated volatile variables.
Verify Zero-Server transmission by testing the workflow in Airplane Mode.
Evaluating Contracts with GenAI Without Breaching NDAs
AI accelerates contract review by instantly flagging non-standard liability clauses, missing indemnifications, or unfavorable termination terms. However, dropping active NDAs, vendor agreements, or employment contracts into Claude or ChatGPT exposes proprietary commercial terms, pricing tables, and counterparty details to external model servers, frequently violating client confidentiality agreements.
The Commercial NDA Risk
Corporate legal teams face extreme risk when exposing commercial files to AI providers:
Breach of NDA: Sharing counterparty names and specific financial schedules with third-party LLMs violates standard confidentiality provisions.
Loss of Trade Secrets: Proprietary terms, pricing formulas, and customized liability structures could be incorporated into model training sets.
The Secure Contract Review Workflow
Protect counterparty data locally before querying AI. Choose the appropriate tool for your review process:
Batch PDF & DOCX Review
Offline Secure Workspace (PRO)
For multi-page PDFs or Word documents. Disconnect your internet (Airplane Mode), and drop your files. The local OCR engine redacts client names, monetary values, and dates entirely in browser RAM.
When summarizing specific contract clauses in online editors or web-based AI tools. The extension auto-masks counterparty identifiers instantly as you type.
Secure Collaboration via Encrypted Handoff (TEAMS)
Once you have sanitized a contract and received an AI analysis (containing tokens like [PARTY_A] and [PARTY_B]), you can share the session with your legal team. Using our zero-server Session Handoff, PrivacyScrubber encrypts the restoration keys locally using libsodium. Your colleague opens the Magic Link, enters the password, and instantly swaps the tokens back to real names in their browser—ensuring sensitive contract details never touch a central database.
Instant Simulation
Secure AI Contract Review Sanitizer
Watch our zero-trust engine neutralize sensitive identifiers 100% locally. No data ever leaves your device.
Local processing 0 Server logs
ZTDS_ENGINE_V1.5.0
PROMPT INPUT > Review application access logs for user Richard Branson (richard@branson.co.uk), phone number: 555-0111.
PROMPT INPUT > Review application access logs for user [NAME_1] ([EMAIL_1]), phone number: [PHONE_1].
Legal Detection Profile
Our zero-trust engine is pre-hardened for Legal workflows, automatically identifying and tokenizing the following parameters 100% locally.
CASE_NUMBER
Active Protection
CLIENT_NAME
Active Protection
JUDGE
Active Protection
LITIGATION_ID
Active Protection
PLAINTIFF
Active Protection
Zero-Trust Architecture
PrivacyScrubber operates entirely on your device. Unlike other platforms, our local PII masking engine never transmits your sensitive prompts or documents to external servers. All detection and restoration happens in your computer's local RAM.
No Backend Connection: Zero API calls, zero tracking, zero logs.
Temporary Memory: Your data exists only for the duration of your tab's life.
We encourage you to audit our zero-trust claims directly in your browser using the Airplane Mode Test:
1
Open your browser's Network Monitor before you start scrubbing.
2
Switch to Airplane Mode (physical or simulated) and protect your text.
3
Verify that no data packets ever leave your machine.
Compliance Decision Matrix
Field-by-Field Sanitization Rule for Master Services Agreement (MSA) & Statement of Work (SOW)
To maintain LLM analytical context while avoiding cloud data breaches, follow this deterministic mapping before submitting prompts to third-party AI models:
Document Field / Box
Required Action
Deterministic Token
Statutory & AI Rationale
Client & Enterprise Vendor Legal Names
REDACT
[CLIENT_1], [VENDOR_1]
Commercial customer entity identity; reveals corporate vendor ecosystem and pricing
Critical risk ceiling clause required for AI contract benchmark analysis
SLA Uptime & Service Credit Percentages
PRESERVE
Cleartext (99.9% Uptime / 10% Monthly Fee Credit for Outages)
Core operational performance benchmarks required for SLA risk evaluation
Termination for Convenience Windows
PRESERVE
Cleartext (30 Days Prior Written Notice)
Essential contract flexibility clause required for commercial commitment modeling
Mutual Intellectual Property Assignment
PRESERVE
Cleartext (Customer retains Work Product; Vendor retains Background IP)
Core IP ownership terms required for corporate risk review
1-Click Persona Prompt
Safe LLM Prompt Template for Master Services Agreement (MSA) & Statement of Work (SOW)
Copy and paste this structured prompt into ChatGPT, Claude, or Gemini alongside your tokenized text to prevent LLM rejection:
You are an Enterprise Commercial Contract Attorney. Review the following sanitized Master Services Agreement excerpt where client, vendor, consultant names, and addresses are replaced with tokens ([CLIENT_1], [VENDOR_1], [NAME_1], [NAME_2], [ADDRESS_1], [ADDRESS_2]).
Tasks:
1. Benchmark the 2x 12-month fees limitation of liability cap and confidentiality super-cap carve-out.
2. Evaluate SLA remedy mechanisms against SaaS industry standards (99.9% uptime).
3. Highlight negotiation redlines to strengthen the client's position without requesting enterprise identities.
[PASTE SANITIZED TEXT HERE]
You are an Enterprise Commercial Contract Attorney. Review the following sanitized Master Services Agreement excerpt where client, vendor, consultant names, and addresses are replaced with tokens ([CLIENT_1], [VENDOR_1], [NAME_1], [NAME_2], [ADDRESS_1], [ADDRESS_2]).
Tasks:
1. Benchmark the 2x 12-month fees limitation of liability cap and confidentiality super-cap carve-out.
2. Evaluate SLA remedy mechanisms against SaaS industry standards (99.9% uptime).
3. Highlight negotiation redlines to strengthen the client's position without requesting enterprise identities.
[PASTE SANITIZED TEXT HERE]
Why Legal Counsel and Risk Management Teams Flag Unmasked AI Prompts
With regulations stating attorney-client privilege (Model Rule 1.6), court confidentiality rules, and state bar ethics opinions on third-party AI use, lawyers must be careful when utilizing cloud intelligence. Resolving this conflict relies on the workflows covered in paralegal ai safety. Verifiable data protection requires local redaction prior to API transit. Establishing local technical controls represents the only path to satisfy these criteria without adding server-side processing overhead.
Through local Zero-Trust Data Sanitization, PrivacyScrubber intercepts text inputs directly in the browser via the Secure Workspace or the automated PrivacyScrubber Chrome Extension.
How to Use AI on Real Legal and Confidential Data — Without Sending a Single Real Name
Through local Zero-Trust Data Sanitization, PrivacyScrubber intercepts text inputs directly in the browser via the Secure Workspace or the automated PrivacyScrubber Chrome Extension. The deterministic AST lookaround tokenization system replaces litigation identifiers with anonymous placeholders (like [CLIENT_NAME]) in local memory. This design conforms with the standards in enterprise data governance, keeping raw client files offline. The Chrome Extension integrates with your browser to redact inputs and restore responses in ChatGPT and Claude. Processing data through browser-based deterministic AST lookaround tokenization allows safe integration of ChatGPT, Claude, Copilot, and AI legal research platforms for complex tasks while preserving client privacy.
Our architecture provides an undeniable audit trail: the Airplane Mode Standard. Disconnect your Wi-Fi and execute a redaction — no data leaves your machine. This adheres to the strictest criteria for cross-border discovery compliance, proving that local execution is the ultimate safeguard for legal confidentiality.
ChatGPT & Enterprise LLMs Integration
Step-by-Step Integration Guide: Secure AI Contract Review
PrivacyScrubber operates entirely client-side. Whether using the copy-paste dashboard, the browser extension, or the MCP Server, your sensitive records stay on your local device. Follow these instructions to safely use ChatGPT & Enterprise LLMs:
Act as an appellate litigation consultant. Analyze the following sanitized deposition transcript and legal correspondence for [WITNESS_1] in matter [CASE_ID_1]:
1. Identify all material contradictions regarding key milestone delivery dates and contractual obligations.
2. Draft 5 pointed cross-examination questions for witness impeachment at trial.
3. Cite applicable legal principles while maintaining factual consistency.
CRITICAL COMPLIANCE INSTRUCTION (PrivacyScrubber ZTDS Standard): Keep all cryptographic token placeholders ([PLAINTIFF_1], [DEFENDANT_1], [WITNESS_1], [CASE_ID_1], [PATENT_ID_1]) strictly unchanged in your analysis for client-side local rehydration via PrivacyScrubber.
Step 3: 1-Click Reverse Rehydration (No Manual Decoding)When ChatGPT & Enterprise LLMs outputs tokens like [NAME_1], paste the AI response back into PrivacyScrubber Reveal to restore original sensitive data in 1 click in local RAM.
The Manual Redaction Trap: Why DIY search-and-replace failsManual prompt editing misses 1 out of every 12 nested identifiers in logs, error traces, and tables, causing catastrophic compliance breaches. PrivacyScrubber deterministically sanitizes 25+ entity types in <2ms entirely in browser RAM before prompt submission.
Statutory Defense: ABA Model Rule 1.6(c) & Federal Rules of Evidence (FRE) Rule 502(b)Client-side deterministic tokenization creates an impenetrable zero-disclosure boundary. Attorney-client privilege is preserved because no unredacted client confidences reach third-party neural networks.
Legal Adoption Use Cases
Managing Partner & General CounselATTORNEY PRIVILEGE
Zero-Trust Verified
Protects attorney-client privileged memos and settlement terms during AI-assisted contract analysis, ensuring work-product doctrine remains intact.
Head of E-Discovery & Litigation SupportDISCOVERY & LITIGATION
Zero-Trust Verified
Sanitizes witness testimonies, trade secrets, and custodian identifiers in browser RAM before feeding deposition transcripts into LLM summarizers.
Scrub it before it reaches the AI — right from your toolbar
The free PrivacyScrubber Chrome Extension replaces names, emails, and IDs with safe tokens directly inside ChatGPT, Claude, and Gemini — before you hit send. Nothing leaves your browser.
Your Whole Team on Real Client Data. Safely. $99/mo Flat.
No per-seat pricing. No DPA negotiation. No IT portal. Secure your entire organization with client-side PII sanitization — $99/month flat, unlimited users. SOC 2 & HIPAA ready. Works in Airplane Mode.
Zero-Trust Data Sanitization (ZTDS) — Verified Architecture
Independently auditable facts for Legal compliance teams
Data transmission
0 bytes sent to any server
Processing location
100% browser RAM (volatile memory)
Session map persistence
Destroyed on tab close — never written to disk
Key derivation
Argon2id (memory-hard, server-independent)
Encryption cipher
XChaCha20-Poly1305 (authenticated encryption)
Offline verification
Airplane Mode Standard — full function without network
BAA / DPA required
No — zero PHI/PII reaches PrivacyScrubber servers
Audit method
Chrome DevTools → Network tab — zero outbound requests
How to audit: Open PrivacyScrubber, enable Airplane Mode, paste any legal text, click Sanitize Prompt. Open Chrome DevTools → Network tab. Zero outbound requests will confirm 100% local execution. The session token map ([NAME_1], [EMAIL_1]…) lives only in browser tab memory and is permanently destroyed when the tab is closed.
The mathematical proofs, RAM memory bounds (<2ms latency), and statutory compliance guarantees of the Zero-Trust Data Sanitization architecture are documented in official Internet standards tracks and peer-reviewed scientific repositories:
Help your DPO, InfoSec, and engineering peers eliminate compliance bottlenecks with zero-server client-side data masking.
COMPLIANCE FAQ
Frequently Asked Questions
Common questions about deploying zero-trust AI for Legal Teams.
Does protecting data with PrivacyScrubber before AI processing satisfy attorney-client privilege (Model Rule 1.6)?
Yes. Processing pseudonymized data for a secondary purpose (AI analysis or drafting) aligns with attorney-client privilege (Model Rule 1.6) because no personally identifiable data is transmitted to the AI provider. The session map that maps tokens back to real values never leaves your browser.
What specific PII does PrivacyScrubber detect for legal workflows?
The engine detects names, email addresses, phone numbers (US and international formats), Social Security Numbers, EINs, credit card numbers, and custom identifiers. PRO users can add custom regex rules to match legal-specific patterns such as proprietary account IDs, MRNs, or internal project codes.
Can I reverse the redaction if I use PrivacyScrubber to mask legal data?
Yes. If you copy the AI's response and paste it back into PrivacyScrubber, it automatically maps the tokens (like [NAME_1] or [ID_1]) back to the original values using the ephemeral session map stored in your browser's memory.
Can PrivacyScrubber be used 100% offline without network requests?
Yes. All processing runs in your browser's local JavaScript engine, with no external server calls. Once the page loads, you can enable Airplane Mode and verify in Chrome DevTools (Network tab) that zero outbound requests occur. All cryptographic operations (including client-side pseudonymization and reverse-revealing) utilize hardware-accelerated XChaCha20-Poly1305 encryption and Argon2id key derivation running entirely inside browser RAM, ensuring your legal data stays 100% on your device.
How can I verify that PrivacyScrubber sends zero data to servers?
Use the 5-step Airplane Mode audit: (1) Open PrivacyScrubber in your browser. (2) Disconnect your network connection (enable Airplane Mode). (3) Paste a text sample containing names, emails, and phone numbers. (4) Click "Scrub in RAM" — all tokens are generated instantly in local browser RAM. (5) Open Chrome DevTools → Network tab and confirm zero outbound requests were made. This test works because PrivacyScrubber uses a Wasm-based regex engine that runs 100% client-side. The session token map (e.g. [NAME_1] → "John Doe") exists only in browser tab memory and is destroyed when the tab is closed.
Do I need a HIPAA Business Associate Agreement (BAA) or GDPR Data Processing Agreement (DPA) with PrivacyScrubber?
No. PrivacyScrubber is designed to run entirely on the client side, meaning no Protected Health Information (PHI) or personally identifiable data is ever transmitted to our infrastructure. Since your data is not processed or stored on our servers, PrivacyScrubber is not acting as a HIPAA Business Associate or a GDPR Data Processor. Consequently, organizations typically determine that standard Business Associate Agreements (BAAs) or Data Processing Agreements (DPAs) are not applicable to PrivacyScrubber. However, you should consult with your compliance officer or legal counsel to verify compliance requirements for your specific workflows.
Can I customize detection rules for industry-specific data formats?
Yes. In the PRO edition of PrivacyScrubber, you can configure custom regular expression (regex) rules designed to target unique patterns associated with your sector and internal taxonomy. This allows you to extend the standard deterministic AST lookaround engine to cover proprietary account formats, internal project identifiers, or custom data attributes while keeping all execution client-side.
Is it safe for lawyers to use ChatGPT for contract review?
Uploading unredacted contracts can waive attorney-client privilege. Lawyers must use zero-trust sanitization to redact names, entities, and privileged details before AI processing. Protect your firm with TEAMS for $99/mo.
Is pasting sensitive data into ChatGPT safe?
Pasting sensitive data directly into ChatGPT can expose it to OpenAI's servers and model training unless you use zero-trust client-side scrubbing like PrivacyScrubber, which tokenizes data before it leaves your browser. Protect your workflows for $15/mo with PRO.
How does client-side PII redaction work?
Client-side PII redaction executes directly in your browser's RAM, intercepting and masking sensitive identifiers before they are transmitted over the internet, ensuring true zero-trust security.
How does the Secure Workspace differ from the Browser Extension?
The Secure Workspace allows bulk offline file processing (PDFs, DOCX) and team handoffs, while the Browser Extension injects native masking directly into ChatGPT or Claude's UI. Both are included in our zero-trust ecosystem.
What is the PII MCP Server used for?
The local Model Context Protocol (MCP) Server allows developers to automate PII sanitization in CI/CD pipelines, agentic workflows, and IDEs like Cursor—all executing 100% locally.
Why Legal Counsel and Risk Management Teams Flag Unmasked AI Prompts
With regulations stating attorney-client privilege (Model Rule 1.6), court confidentiality rules, and state bar ethics opinions on third-party AI use, lawyers must be careful when utilizing cloud intelligence. Resolving this conflict relies on the workflows covered in paralegal ai safety. Verifiable data protection requires local redaction prior to API transit. Establishing local technical controls represents the only path to satisfy these criteria without adding server-side processing overhead.
How to Use AI on Real Legal and Confidential Data — Without Sending a Single Real Name
Through local Zero-Trust Data Sanitization, PrivacyScrubber intercepts text inputs directly in the browser via the Secure Workspace or the automated PrivacyScrubber Chrome Extension. The deterministic AST lookaround tokenization system replaces litigation identifiers with anonymous placeholders (like [CLIENT_NAME]) in local memory. This design conforms with the standards in enterprise data governance, keeping raw client files offline. The Chrome Extension integrates with your browser to redact inputs and restore responses in ChatGPT and Claude. Processing data through browser-based deterministic AST lookaround tokenization allows safe integration of ChatGPT, Claude, Copilot, and AI legal research platforms for complex tasks while preserving client privacy.
Is PrivacyScrubber safe for contract review AI, anonymize contracts, AI legal review privacy?
Yes, absolutely. PrivacyScrubber operates on a 100% Zero-Trust Data Sanitization (ZTDS) architecture, meaning all redaction happens locally within your browser. When working with contract review AI, anonymize contracts, AI legal review privacy, no sensitive data ever leaves your device or touches a cloud server.
How does it handle custom data structures for legal?
Our engine includes 30 specialized industry profiles optimized for legal data. Furthermore, our Flat-rate TEAMS tier ($99/mo flat) allows you to define unlimited custom Regular Expressions that process data securely in offline memory.
Disclaimer: This guide offers technical data obfuscation best practices. It does not constitute legal advice. Consultation with counsel for GDPR/HIPAA compliance is recommended.
Tap badge to inspect/restore · Pinch to zoomClick badges to unmask false positives
100% Volatile RAM Preview — Zero Network Transmission
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Click any badge to unmask· Secure Flattening (Zero Hidden Text Layers)·Scroll to navigate · Ctrl+Scroll to zoom
Detected Sensitive Token
[TOKEN]
Original masked value:
Sensitive Data
CISO Security Brief & Zero-DPA Memo
Enter your corporate details for instant access to the printable Executive Security Brief, Statutory Compliance Memo, and Enterprise Air-Gapped Deployment Guide.
Pre-cleared statutory brief to bypass vendor questionnaires and expedite TEAMS ($99/mo) or Developer SDK ($299/mo) approval.
Select Procurement Track:
ZTDS™ VERIFIED0-Byte Egress · No DPA · U.S. & Int'l Patents Pending · 2-Page Audit Brief
Manual Activation
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Add to Device Home Screen
1-Click Launch & Instant Prompt Sanitization
1
Tap the Share button in Safari or Chrome bar.
2
Scroll down and select Add to Home Screen.
1-Tap Offline Launch Zero Install · RAM Only
Airplane Mode Challenge
Zero-Server · Zero-Trust · 100% Local
Turn off your Wi-Fi right now and try pasting text into the tool below. It processes 100% in your local RAM without sending any network requests.
Zero Accounts · Free Forever: No accounts or passwords exist because there are no backend servers. No trial expiration — the Community Tier is 100% free and runs immediately in your local browser.
