Legal AI Privacy Chrome Extension

Protect
what you
owe them.

Naosuu automatically redacts all client-identifying information from your AI prompts — before they reach ChatGPT, Claude, or Gemini. Your clients get the confidentiality they deserve. You get the productivity you need.

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AI platforms
at launch

Deep

Legal data
pattern coverage

Bytes sent to
Naosuu servers

Before Naosuu — your prompt as you type it

"I represent Bruce Wayne in the matter of Wayne Enterprises v. Penguin Industries, Case No. GC-2025-0847. Please draft a breach of fiduciary duty complaint. Opposing counsel: Oswald Cobblepot, Iceberg LLP, 47 Narrows Blvd, Gotham."

naosuu intercepts — zero exposure

After Naosuu — what ChatGPT, Claude, or Gemini receives

"I represent [CLIENT_1] in the matter of [ORG_1] v. [ORG_2], Case No. [CASE_001]. Please draft a breach of fiduciary duty complaint. Opposing counsel: [PERSON_2], [ORG_3], [ADDRESS_1]." Bruce Wayne · Iceberg LLP · 47 Narrows Blvd, Gotham · #GC-2025-0847 — all protected.

Preflight panel — you review before every send

Check or uncheck each detected item. Add anything Naosuu missed. Nothing is sent until you confirm.

6 entities detected

✓ No AI · No server · 100% local

You approve before sending

The Mechanism

Four steps.
You stay in control at every one.

You use AI exactly as you do today — but before anything is sent, Naosuu gives you a preview and puts you in charge of exactly what gets redacted.

Step 01 — Input

Type your prompt and even upload a document

Write your question with real client names, case numbers, and all the context the AI needs. Or upload a PDF, Word document, or text file — Naosuu extracts the text automatically and adds it to your prompt, ready for redaction. Note: document upload works with text-based files. Naosuu extracts the text layer — it does not process scanned images as images.

Step 02 — Preflight Review

Review every detection before anything is sent

Before your prompt goes anywhere, Naosuu opens a preflight panel showing you exactly what it detected. Every identified element is listed — you can check or uncheck each item individually. If Naosuu missed something, you can add words or phrases manually at the bottom of the panel. Nothing is sent until you approve it. You are always the last line of defence.

Preflight panel — you see this before every send

☑ [CLIENT_1] — Bruce Wayne

☑ [CASE_001] — #GC-2025-0847

☑ [ORG_1] — Penguin Industries LLC

☐ [DATE_1] — 03/12/2025 (unchecked — not sensitive here)

+ Add a word or phrase Naosuu missed...

→ You decide what gets redacted. Naosuu never sends without your confirmation.

Step 03 — Redaction & Send

Naosuu redacts and sends the clean prompt

Once you confirm, Naosuu replaces every approved item with an anonymous placeholder and sends the clean prompt to the AI. No names. No case numbers. No identifying information of any kind — just context. And critically: no AI is involved in this process. Naosuu uses rule-based pattern matching and named entity recognition running entirely on your machine. Your data is never processed by a model, never sent to Naosuu, never seen by anyone but you.

What the AI receives: "Draft a demand letter for [CLIENT_1], re: [CASE_001], claim value [AMOUNT_1], against [ORG_1]. Signed: [ATTORNEY_1]..." Bruce Wayne · Penguin Industries · $2.4M · Harvey Dent Esq. — none of it reached the AI.

Step 04 — Rehydration

You see a fully personalised, real-name response

When the AI responds, Naosuu swaps every placeholder back to the real name or value — locally, in your browser, before the text appears on screen. You get a response that reads as if the AI knew everything. It never did.

Important — How Naosuu Works in Practice

Use Naosuu's upload button — not the AI's own. Naosuu adds a document button next to the AI's chat input. Use that button. The AI platform's own attachment button sends your file directly to the AI, bypassing Naosuu's redaction entirely.

Rehydration happens after the AI finishes replying — not while it is streaming. Wait for the full response before reading the rehydrated text.

Rehydration does not persist after you leave the chat. If you close the tab or return to a previous conversation, you will see placeholders again — the real names are never stored outside the session.

Always review before sending. Naosuu is thorough, but you are the last line of defence. Check the preflight panel to catch anything it may have missed.

Detection Engine

Built for legal language.
Not generic privacy.

Naosuu was designed from the ground up for legal documents — with data patterns calibrated for the identifiers that actually appear in briefs, contracts, and client files.

🔐

Sensitive Session Mode (SSM)

When you're working with especially sensitive material — attorney-client communications, work product, internal strategy documents — activate SSM for stricter, wider redaction rules that catch even indirect identifiers like city names and professional titles.

Wider amber detection Privilege-aware Strategy documents

SSM intelligently expands the detection net to include elements that, in isolation, seem innocuous — but in combination, could re-identify a client. It's the mode you want on for every matter that matters.

👤

Client & Party Names

NER engine catches full names, partial names, and contextual references across all parties to a matter.

NER Engine

📋

Case & Docket Numbers

State, federal, and administrative court formats. Internal file references. Matter numbers. All matched.

Extensive Regex Coverage

🏥

Medical & Financial Data

SSNs, insurance numbers, medical record IDs, financial figures, account numbers, and settlement amounts.

Financial + Medical

Document Upload

Upload a PDF, Word (.docx), or text file. Naosuu extracts the text and adds it directly to your prompt — then redacts it through the same preflight review before anything is sent. Works with text-based documents; Naosuu extracts the text layer, not scanned images.

PDF · DOCX · TXT · Text extraction

🚫

No AI. Zero data transmission.

Naosuu does not use artificial intelligence. Detection runs on rule-based pattern matching and named entity recognition — entirely on your machine. Nothing is sent to Naosuu's servers. Not your prompts. Not your documents. Not even anonymised metadata. We have nothing because we receive nothing.

100% local · No model · No server

📍

Addresses & Locations

Home and office addresses, property descriptions, accident sites, and geographic references that could identify a client or case.

Location Detection

Platform Coverage

One install. Three platforms.
No new workflow.

Naosuu integrates directly into ChatGPT, Claude, and Gemini — protecting you inside the tools you already use, without any extra steps.

ChatGPT

Live

Full integration with OpenAI's ChatGPT editor, all plans. Naosuu intercepts on every submission without any configuration needed on your part.

→ Stale reference fixed · Full rehydration working

Claude.ai

Live

Deep integration with Anthropic's Claude, including Tiptap/ProseMirror editor support and a MutationObserver second pass for Claude's progressive streaming — your response always arrives complete.

→ Progressive rendering handled · MutationObserver rehydration

Gemini

Live

Fully functional on Google Gemini. The Angular-based interface was reverse-engineered and tested end-to-end. No extra steps for users.

→ Angular selector chain stable · E2E verified

Real Legal Work

Whatever you practice,
Naosuu has you covered.

Litigation · Personal Injury

Upload Harvey Dent's intake form, ask AI to draft a demand letter. Naosuu ensures Harvey's name, injury date at Gotham City Hall, policy number, and Dr. Leslie Thompkins never appear in the AI's pipeline. You get a perfectly personalised draft.

Corporate · M&A Due Diligence

Paste the Wayne Enterprises acquisition memo, ask AI to flag risks. Naosuu strips Wayne Enterprises, the $4.2B deal value, and Bruce Wayne's identity before sending — the AI sees structure, not secrets.

Family Law · Custody

Summarise the Selina Kyle custody matter for motion drafting. Naosuu removes the child's name, the address on Gotham's East Side, school records, and financial disclosures — the most sensitive data in any family matter — automatically.

Employment · Workplace Investigation

Draft an investigation report into the Arkham Asylum HR complaint. Naosuu strips employee names, Jonathan Crane's HR file, incident dates, and witness identities before a single character leaves your browser.

Protectwhat youowe them.

Start protectingyour clientstoday.

Protect
what you
owe them.

Start protecting
your clients
today.