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How to Protect Your Sensitive Data When Using AI Tools

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

How to protect sensitive data when using AI is the defining question for modern professionals. AI tools, and AI assistants can transform how your team works, but they also create new data exposure risks. A simple, effective protection: strip personally identifiable information before any document reaches an AI platform. Justee automates this process in minutes.

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

Pre-upload PII redaction is one of the most practical ways to protect sensitive data when using AI.

Organizations should establish clear internal policies defining which specific document types require redaction before any AI use.

Semantic placeholders effectively preserve document structure and context for AI analysis without exposing the redacted details.

Justee processes all documents with AES-256 encryption and deletes files immediately after redaction is done.

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.

Protecting sensitive data while leveraging AI productivity tools requires a layered approach that combines technical safeguards with organizational policies. The most critical layer is preventing sensitive data from reaching external platforms in the first place. The National Institute of Standards and Technology recommends that organizations evaluate data flows and implement appropriate controls before integrating AI tools into business processes. The Federal Trade Commission has reinforced that businesses bear responsibility for protecting personal information regardless of the technologies they employ. Practical implementation begins with identifying which documents contain personally identifiable information, establishing redaction workflows as standard operating procedure, and selecting tools that automate the detection and replacement of sensitive entities. Done well, automated PII redaction lets organizations capture the productivity benefits of generative AI while keeping meaningful control over confidential data and 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

Full names, email addresses, phone numbers, and physical addresses detected and replaced across all files

Social Security numbers, tax IDs, and government-issued identification numbers automatically masked

Bank account details, routing numbers, and financial transaction data stripped before AI processing

Company names, tax IDs, and business license numbers replaced with neutral labels

Medicare IDs, insurance policy numbers, and provider NPIs scrubbed from documents before external sharing

Risks of Sharing Unredacted Documents

AI platforms may store uploaded content on external servers with retention policies outside your control

Unredacted financial data could be exposed through platform breaches or unauthorized model training

Employee personal information in HR documents may create regulatory liability if shared with AI tools

Client confidential data in uploaded contracts could violate professional duty and NDA obligations

Trade secrets and proprietary methodologies may lose legal protections once shared with third-party systems

How It Works

1
Upload Your Document

Drop your file into Justee before sending it to any AI platform. We support PDF and DOCX formats.

2
Automatic Entity Detection

Justee's AI engine identifies over 30 types of sensitive data, from personal names to account numbers and tax IDs.

3
Review and Adjust

See a count of what was found, by type, then check the semantic placeholders in the redacted file.

4
Export for Safe AI Use

Download the redacted document and share it with AI tools, or any AI tool. Original files are deleted immediately.

Illustrative Example

A product management team at a SaaS company used AI tools to analyze user research transcripts and generate feature prioritization reports. The research transcripts contained user names, company affiliations, job titles, specific product usage metrics, and candid feedback about competitor platforms.

Issue Found: A product manager uploaded unredacted transcripts that included a Fortune 500 client's internal workflow details, the contact information of their VP of Engineering, and specific revenue impact figures shared under NDA during user interviews.

Resolution: The product team adopted Justee redaction as a standard step before any AI-assisted analysis. User names, company names, and contact details are now replaced in transcripts before processing, and researchers remove NDA-protected figures by hand.

User Research Transcript: Before vs. After Redaction

Why it matters: The participant's name, company, and email are replaced. The call date and the revenue figure stay, so remove figures shared under NDA yourself. AI tools can still analyze the feedback themes.

No credit card required

A note from Justee

Data protection when using AI is not a one-time decision. It is a workflow habit. The organizations that build redaction into their process from day one avoid the problems that others only discover after a breach.

AI PII Redaction vs. Manual Redaction

FeatureJustee AI RedactionManual Redaction
Setup TimeNo setup required, ready to useRequires training and checklists
Detection Scope30+ entity types in PDF and DOCXLimited to reviewer expertise
Processing SpeedMinutes per documentSlow, page-by-page review
Data SecurityAES-256 encryption, files deleted after useUnredacted copies may persist
Team ConsistencySame automated checks for every userResults vary by individual
* 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 AI Risk Management Framework

NIST provides comprehensive guidance for organizations on managing risks associated with AI systems, including data privacy and security considerations.

CISA Secure by Design Principles

CISA outlines principles for building and using technology securely, relevant to organizations integrating AI tools into their document workflows.

ENISA AI Threat Landscape Report

The European Union Agency for Cybersecurity provides analysis of AI-related threats, including risks of data exposure when sharing documents with generative AI platforms.

Related Tools

PII Redaction ToolFree Contract ReviewContract ComparisonEmployment Contract ReviewPlans & PricingPrivacy FAQ
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 highly effective approach is to redact personally identifiable information from documents before uploading them to any AI platform. This keeps detected sensitive data off external servers.

Any AI tool that processes documents on external servers, including any major AI service, can pose data privacy risks if sensitive information is uploaded without redaction.

Start by identifying which document types contain PII, require pre-upload redaction for all sensitive files, choose an automated redaction tool, and train your team on the workflow.

Yes. Justee produces redacted documents that work with any AI platform. It functions as a pre-processing step that is platform-agnostic.

Justee detects over 30 entity types including names, SSNs, financial accounts, email addresses, phone numbers, Medicare IDs and provider numbers, dates of birth, and organization names. Medical record numbers, policy numbers and amounts are not detected; remove them yourself.

Yes. Justee offers free redaction with no sign-up required. Simply upload your document, download the redacted version, and check it.

Justee encrypts files in transit (TLS 1.2+) and at rest (AES-256) and deletes all files immediately after redaction is complete. No copies of your documents are retained.

Automated redaction applies the same checks to every page, which manual review struggles to match on long documents. It is still best-effort, so pair it with a human review of the output.

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.