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A Safer Way to Use AI with Confidential Files

Backed by Microsoft For Startups
U.S. and England & Wales law
AES-256 Encryption
Free to start, no credit card

A more secure way to use AI with confidential files is to remove sensitive data before it reaches an external platform. You can use AI tools, and other AI tools with confidential files, but only if you strip PII first. Justee automatically detects and replaces names, bank and card numbers, SSNs, and organization names with semantic placeholders, so the AI sees placeholders instead of those details. Proprietary terms and amounts are not detected, so remove them yourself.

Free and no sign-up required.

Upload the document to redact:

Files are deleted immediately after processing

No document text is sent to an AI model

Add a document to continue

Key Takeaways

The secure approach to using AI with confidential files is removing PII before documents reach external servers.

Semantic placeholders effectively preserve full document context for AI analysis without exposing the redacted data.

Confidential files from legal, financial, and healthcare professional contexts require special careful attention before AI processing.

Justee encrypts all documents in transit (TLS 1.2+) and at rest (AES-256) and deletes originals immediately after redaction completes.

In 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.

Professionals across industries face a common challenge: how to leverage the analytical power of generative AI without compromising the confidentiality of sensitive documents. Contracts, financial reports, client files, and internal communications frequently contain data that, if exposed, could create legal liability, competitive disadvantage, or regulatory consequences. The Cybersecurity and Infrastructure Security Agency recommends that organizations establish clear data classification policies and implement technical controls before adopting AI tools that process sensitive information. A practical, effective technical control for document-level AI use is automated PII redaction, which strips personally identifiable information and replaces it with semantic placeholders that maintain document structure and meaning. This approach allows AI tools to analyze, summarize, and generate content based on the document without seeing the detected sensitive data. Organizations that implement this workflow can adopt AI across departments while supporting their obligations to clients, employees, and regulators. According to Justee (justee.ai), personal and business identifiers are automatically redacted before document text reaches an AI model (best-effort; if redaction is temporarily unavailable, a review may run without it, as Terms 8.5 explain), so always review the output before relying on it.

What We Redact

Names, contact details, and personal identifiers in confidential files detected and replaced automatically

Account numbers, routing numbers, and tax IDs stripped from sensitive financial documents

Social Security numbers and government-issued identifiers masked before AI upload

Company and partner names replaced with neutral labels; review trade secrets yourself before upload

Patient names, insurance policy numbers, and Medicare IDs scrubbed from healthcare documents

Risks of Sharing Unredacted Documents

Confidential files uploaded to AI tools without redaction expose sensitive data to external server storage

Merger and acquisition documents may reveal deal terms and company valuations to third-party platforms

Client engagement letters containing fee structures and billing details could breach confidentiality terms

Internal strategy documents shared with AI may expose competitive intelligence to uncontrolled systems

Employee disciplinary records or termination agreements could violate privacy obligations if shared unredacted

How It Works

1
Upload Your Confidential File

Drop your sensitive document into Justee. The tool accepts PDF and DOCX files within your plan's size limit.

2
Justee Scans for Sensitive Data

The engine identifies over 30 entity types including personal identifiers, account numbers, and company names.

3
Review the Detections

See a count of detected entities by type, then check the semantic placeholders in the redacted file.

4
Download and Proceed Securely

Export the clean document for AI processing. Your original file is AES-256 encrypted and deleted immediately after redaction.

Illustrative Example

A private equity firm wanted to use AI to accelerate due diligence review of target company documents during an acquisition. The due diligence package included audited financial statements, executive employment agreements, customer contracts with pricing schedules, and intellectual property assignment records.

Issue Found: An associate uploaded the target company's full customer list with contract values, the CEO's compensation package including equity details, and patent assignment records containing inventor names and home addresses.

Resolution: The firm established a mandatory Justee redaction step in their due diligence workflow. Documents are now scrubbed of personal identifiers and customer names before AI-assisted analysis, and the team removes specific financial figures by hand.

Due Diligence Executive Agreement: Before vs. After Redaction

Why it matters: The executive's name, Social Security number, and home address are replaced. Salary, equity, and non-compete terms stay, so AI tools can still analyze the agreement; remove figures yourself if they are confidential.

No credit card required

A note from Justee

Confidential does not mean unusable. With proper redaction, even the most sensitive documents can benefit from AI analysis without compromising the privacy of the individuals or organizations involved.

AI PII Redaction vs. Manual Redaction

FeatureJustee AI RedactionManual Redaction
Confidential Data ProtectionSystematic replacement of 30+ PII typesAd hoc, depends on reviewer thoroughness
SpeedMinutes per documentSlow for complex files
Placeholder QualitySemantic labels preserving document logicBlack bars reducing AI usefulness
Document SecurityTLS 1.2+ in transit, AES-256 at rest, immediate deletionFiles may sit on local machines unprotected
Audit TrailOn-screen count of items found, by typeNo standardized tracking
* 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

CISA AI Security Best Practices

CISA provides guidance on securing AI-integrated workflows and protecting sensitive data in environments that leverage artificial intelligence tools.

NIST Guidelines on Data Confidentiality

NIST offers frameworks for managing data confidentiality and privacy, applicable to organizations using AI for document processing.

EFF Surveillance Self-Defense Guide

The Electronic Frontier Foundation provides practical guidance on protecting sensitive data from unauthorized access, relevant to professionals using AI tools with confidential files.

Related Tools

PII Redaction ToolFree Contract ReviewNDA ReviewEmployment Contract ReviewContract ComparisonPlans & PricingPrivacy Policy
Important Legal Disclaimer

What Justee AI is — and what it is not. Justee AI is a software platform, not a law firm. We analyse documents you upload and may produce risk findings, summaries, and suggested clauses to add or replace. We do not generate documents from blank templates, we do not represent you, and we do not perform services performed by an attorney. Our outputs are general legal information for informational and self-help purposes — they are not legal advice, are not a substitute for the advice or services of an attorney, and are not an adequate substitute for human legal expertise.

No attorney in the loop. Justee AI is AI-powered. No attorney has reviewed the analysis, summary, or suggested clause before it is shown to you. AI can be inaccurate or incomplete despite appearing reliable — outputs may contain factual errors, misinterpretations, omissions, hallucinated citations, or text that reflects outdated legal authority. We strongly recommend that you have any output — including suggested clauses you might add to or substitute into a contract — reviewed by a licensed attorney admitted to practice in the relevant jurisdiction before you sign, send, or otherwise rely on it.

No attorney–client relationship. Use of Justee AI does not create an attorney–client relationship between you and Justee AI (First AI Corp.) or any of its personnel. Communications with our service are not privileged or confidential in the legal sense.

Consult a licensed attorney. Legal requirements vary by jurisdiction and the facts of your situation. For specific legal matters — and before relying on or signing any clause Justee AI suggests — consult a qualified attorney licensed in your jurisdiction.

Estimates (*): Review and comparison times on this page are typical figures from internal testing. Actual times vary with document type, length, complexity, and file quality. Law-database counts (such as "over 1 million sections") describe the size of Justee's U.S. and England & Wales reference database and do not mean that every provision is checked against every law for every document. Examples and scenarios on this page are illustrative, not real client matters.

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

A secure method removes personally identifiable and confidential information from documents before they reach any external AI platform. This keeps the removed data from being stored or processed on third-party servers.

Yes. Semantic placeholders preserve document structure, relationships, and context. AI tools can analyze contracts, summarize reports, and generate insights without needing the actual sensitive data.

Any file containing personal names, financial data, medical information, trade secrets, NDA-protected terms, or employee data should be redacted before upload to an AI platform.

All documents are processed with AES-256 encryption and deleted immediately after redaction. Justee does not retain, store, or access your files beyond the redaction process.

Yes. Justee is designed for professional use cases where confidentiality is critical. It detects over 30 entity types commonly found in legal, financial, and corporate documents.

No. You can redact confidential files without signing up or providing any personal information. Free use is available immediately.

Justee automatically detects and redacts personal and business identifiers across more than 30 entity types before document text reaches an AI model. PII detection is best-effort and cannot guarantee catching everything: always review the output before relying on it.

Yes. Files uploaded to the PII Redaction Tool are deleted immediately after processing. Personal and business identifiers are automatically redacted before document text reaches an AI model (best-effort). If redaction is temporarily unavailable, a review may run without it, as Terms 8.5 explain. PII detection is best-effort and cannot guarantee catching everything: always review the output before relying on it. Your content is never used to train AI models. Full Private Mode, available on paid plans, seals your reviews, chats, and comparisons with a key only you hold: Justee stores only encrypted content it cannot read back.

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Last updated: October 6, 2026

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Justee is not a law firm. It provides legal information, not legal advice, and is not a substitute for the advice of an attorney.