Logo
AI Document Review
Free
Comparison
Free
PII Redaction
Free
Pricing
Sign inSign up

Document Sanitizer for LLM: Clean Files Before AI

Backed by Microsoft For Startups
Guided by Grayver Law Group
AES-256 Encryption
Free during early access

Justee is a document sanitizer for LLM workflows that automatically strips names, SSNs, financial data, and confidential business details before any AI interaction. Large language models process every word you provide — including the sensitive parts. Sanitize your documents to keep PII off external servers.

Free and no sign-up required.

Upload your document for PII Redaction

Drop a file here or click to browse

Supports PDF, DOCX

Uploaded files are deleted immediately after processing

No one has access to the files you upload

Key Takeaways

LLMs including AI models, AI assistants, and AI tools process all submitted text which may include sensitive data you did not intend to share.

Document sanitization replaces identifiable information with safe placeholders while preserving analytical context for LLM use.

Justee detects over 30 PII entity types automatically, catching data that manual review consistently misses in longer documents.

Files are encrypted with AES-256 during processing and deleted immediately after, ensuring zero data persistence on external servers.

Under 2 minutes*

Average Redaction Time

30+ types

PII Entity Types Detected

AES-256 Encryption

Document Security

* Estimates based on typical documents. Actual results vary by document size and complexity.

Large language models have become essential productivity tools for businesses, but their data handling practices create new privacy considerations that many organizations have not addressed. When a user submits a document to an LLM, the entire text is processed on the provider's infrastructure, where it may be logged, cached, or used for model improvement depending on the service agreement and configuration. The National Institute of Standards and Technology recommends that organizations implement data minimization practices, sharing only the information necessary for a given purpose. For LLM interactions, this means stripping personally identifiable information before submission. According to FTC enforcement precedent, businesses that fail to implement reasonable safeguards for personal data — including when sharing with third-party technology platforms — may face regulatory action. Document sanitization tools provide an automated mechanism to enforce this minimization principle, ensuring that LLMs receive the business context needed for useful analysis without the personal identifiers that create regulatory and reputational risk.

What We Redact

Personal names across all document positions including signatures, CC lines, and reference sections detected

Government identifiers like SSNs, ITINs, passport numbers, and state ID numbers found and replaced

Email addresses and phone numbers in both standard and non-standard formats identified and stripped

Financial institution names paired with account numbers and routing numbers redacted together

Organization names, department references, and internal project identifiers anonymized for safe LLM use

Risks of Sharing Unredacted Documents

LLM providers may retain submitted text in logs for debugging, safety review, or model improvement purposes

Documents containing multi-party PII multiply exposure risk as each party's data is transmitted simultaneously

Technical documents submitted to coding LLMs may contain API keys, credentials, or internal URLs alongside PII

Repeated LLM submissions of unredacted documents create a growing archive of exposed personal data over time

Professional services firms face heightened liability as client PII in LLM submissions may violate fiduciary duties

How It Works

1
Upload the Document

Drop your PDF, DOCX, or TXT file into the Justee sanitizer. Works in any modern browser with no setup.

2
Comprehensive PII Scan

Our engine identifies names, SSNs, emails, phone numbers, addresses, financials, and 20+ additional entity types.

3
Review Sanitization Results

A clear summary shows every PII element detected and the placeholder that replaced it in the clean output.

4
Use with Any LLM

Copy the sanitized text or download the clean file. Submit to AI models, AI assistants, AI tools, or any LLM safely.

Hypothetical Case Study by Justee

A digital marketing agency with 30 employees used various LLMs daily for content creation, data analysis, and client reporting. Account managers routinely pasted client briefs, campaign performance reports, and partnership agreements into LLMs. These documents contained client company names, contact persons, campaign budgets, and audience targeting data tied to specific geographic and demographic details.

Issue Found: Over a three-month period, the agency had submitted an estimated 400+ documents to LLMs without any sanitization. A sample review of 20 documents revealed 280 PII elements including client names, executive contacts, budget figures tied to named accounts, and audience data that could identify specific consumer segments.

Resolution: The agency implemented Justee as the standard first step in their LLM workflow. A browser bookmark to Justee was added to every employee's toolbar, and the average time to sanitize a document before LLM submission was under 90 seconds.

Client Brief Document Sanitization Example

Why it matters: Client and agency identities are anonymized along with personal contact details and specific location targets. The budget figure and demographic range remain for LLM analysis of campaign strategy and resource allocation.

No credit card required

Document sanitization before LLM use is not paranoia — it is basic data hygiene. The same way you would not email a client's SSN to a stranger, you should not submit it to an AI system where you have no control over data retention or access.

Artem Dolukhanyan
Artem Dolukhanyan

Partner, Corporate Transactions at Grayver Law Group

AI PII Redaction vs. Manual Redaction

FeatureJustee AI RedactionManual Redaction
LLM CompatibilityWorks with all LLMs universallyMust re-review for each platform
Detection Breadth30+ entity types automatedLimited to reviewer knowledge base
Time to SanitizeUnder 2 minutes average30+ minutes for thorough review
Placeholder ConsistencyNumbered, structured placeholdersAd hoc, inconsistent replacements
CostFree tier, affordable plansStaff time at $40-150/hour
* Comparison data represents estimates based on internal testing for typical document types. Redaction times and detection coverage vary by document complexity, length, and content type.

Official Privacy & Data Protection Resources

NIST Privacy Framework

NIST framework for managing privacy risks in technology-driven organizational processes.

FTC: Protecting Personal Information Guide

FTC guide for businesses on implementing reasonable data protection safeguards.

OWASP Top 10 for LLM Applications

OWASP identifies the top security risks for large language model applications, including data leakage through prompt injection and training data exposure.

Related Tools

PII Redaction ToolFree Contract ReviewContract ComparisonLease Agreement ReviewPlans & PricingPrivacy Policy
Important Legal Disclaimer

Not Legal Advice: The information and analysis provided by Justee AI is for general informational purposes only and does not constitute legal advice. While we strive to provide accurate and helpful information, our AI-powered service is not a substitute for professional legal counsel.

No Attorney-Client Relationship: Use of Justee AI does not create an attorney-client relationship. Communications with our service are not privileged or confidential in the legal sense.

Consult a Professional: For specific legal matters, we strongly recommend consulting with a qualified attorney licensed in your jurisdiction. Legal requirements vary by location and circumstances, and only a licensed attorney can provide advice tailored to your specific situation.

Performance Estimates (*): All statistics, metrics, and numerical claims on this page — including review times, cost comparisons, accuracy percentages, and database size — are estimates based on internal testing, industry research, and typical use cases. Actual results vary based on document type, complexity, length, jurisdiction, and other factors. Cost comparisons reference publicly available average attorney rates and are not guaranteed savings. "1M+ laws and regulations" refers to the breadth of Justee's reference database and does not imply that every provision is checked against every law for every document.

By using our service, you acknowledge that you have read and agree to our Terms of Use and understand the limitations of AI-powered legal analysis. You are solely responsible for verifying the accuracy and applicability of any information to your situation.

Frequently Asked Questions

Document sanitization is the process of removing or replacing personally identifiable information and confidential data from a document before sharing it externally. The result is a clean document that preserves structure and context without containing sensitive details.

All LLMs that process your text on external servers, including AI models, AI tools, Mistral, and AI assistants. If the LLM is not running locally on your own hardware, sanitization is recommended.

No. LLMs analyze language patterns, document structure, and logical relationships. Replacing names with placeholders does not reduce the quality of summaries, analyses, or generated content.

Justee is optimized for business documents like contracts, agreements, and correspondence. For code files, consider removing API keys and credentials manually alongside using Justee for embedded PII.

The terms are often used interchangeably. Both refer to the process of removing sensitive information from documents. Justee uses consistent placeholder replacement rather than black-box redaction, preserving document readability.

Sanitization is one-directional by design. The redacted document does not contain the original PII and cannot be reversed. This is the core privacy feature — once sanitized, the data is permanently removed from the output.

Justee currently supports PDF, DOCX, and TXT files. These cover the vast majority of business document formats used in LLM workflows.

Ready to Redact PII from Your Documents?

Upload your document above to get started. No sign-up required.

Need more redactions? Create a free account

Last updated: May 13, 2026

Privacy

Legal

Terms of servicePrivacy policy

About

About usContactsBlogAffiliate program

Follow us

LinkedIn
logo

© 2026 Justee. All rights reserved.