Secure & Optimize Your
AI Interactions

A browser extension that automatically masks Personally Identifiable Information (PII) and optimizes tokens before your prompts ever leave your device.

AIgis acts as Client-Side Privacy Firewall for LLMs in scenarios where privacy is a concern (“Shadow AI”), particularly when individuals use third-party platforms to interact with LLMs.

Install from Chrome Web Store View on GitHub

Everything you need for Enterprise-Grade AI

🛡️

Zero-Trust Local Masking

AIgis operates completely locally. It scans your prompt for Emails, IBANs, Phone Numbers, Addresses, IP Addresses, Secrets and more. All sensitive data is replaced with unique, traceable placeholders (e.g. [EMAIL_1]) before the prompt is sent to the LLM-platform. You choose which data to mask and which to let through.

Original: Contact me at foo@bar.com
Sent: Contact me at [EMAIL_1]
⚡

Seamless Restoration

When the AI generates a response using your placeholders, AIgis automatically injects your real data back into the DOM seamlessly. Only you can see your sensitive data, without the AI ever knowing what it was.

📚

Custom Masks

Block specific proprietary terms and regex. Add code-names like "Project Apollo" to your dictionary, and AIgis will mask them across all supported platforms instantaneously.

🎯

TOON Optimization

Token Optimized Object Notation (TOON) automatically detects and compresses heavy JSON structures inline in your prompt before sending. Based on TOON benchmarks, it achieves 74% accuracy (vs JSON's 70%) while using ~40% fewer tokens in mixed-structure tests. Upon copying response text, it seamlessly decodes TOON blocks back to clean JSON directly in your clipboard!

🔒

100% Offline Core & Zero-Trust Architecture

Privacy isn't just a feature; it's our architecture. AIgis utilizes a strict dual-storage model. Your highly sensitive data and PII Vault mappings are physically air-gapped to your local hard drive (chrome.storage.local), while non-sensitive preferences safely sync across your own personal devices. By processing all redaction logic locally, we eliminate the need for third-party cloud APIs.

✓ No Telemetry
Your prompts and data are never logged or tracked.
✓ Local compute
Masking logic runs on your hardware, not any servers.
✓ Auto-Pruning
Vault data expires locally, reducing forensic risk.
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Share & Backup

While your personal preferences automatically sync across your own devices via Chrome's native infrastructure, you can also manually export your AIgis configuration as JSON — for backups or one-time sharing of code-words and redaction lists with your team.

📋

Smart Copy

Just copy the AI's answer like you always do (Ctrl+C). AIgis intercepts the copy pipeline, swaps placeholders back to your real data and decodes TOON blocks to clean JSON — so your clipboard always holds the usable, original text.

🔔

Rule Subscriptions for Teams

Keep entire teams in sync: host a ruleset once and let everyone subscribe to it. AIgis pulls the feed automatically (strictly one-way — nothing is ever sent back), keeps shared wordlists fresh and can even manage settings centrally, with every change requiring your explicit consent. Untrusted regex stays inert and every executed pattern passes a ReDoS-safety validation pipeline.

Seamless Native Integration

AIgis natively intercepts and protects data on the following platforms:

Loading supported platforms from GitHub...

Built for Speed & Transparency

Quick-Access Popup

Manage your core masking settings instantly from the extension popup. See what modules are active, check real-time protection status, and toggle features without breaking your workflow.

Quick-Access Popup Dashboard
Unlocked Badges
Locked Badges

Secure Badges

Always know what is being masked. The un-intrusive badges on supported AI-websites gives you a live overview of exactly what data is being masked/shielded on the current chat. You can toggle on Peek-Mode to view the original text, either permanently or temporarily.

Global Control Dashboard

Control exactly which modules are active and switch between strict or developer modes. Disable specific PII masks if needed, or import and export Custom Dictionary libraries with your entire team via JSON synchronization.

  • ✓ Deep context-aware site integration
  • ✓ Secure Active Vault data handling
  • ✓ Exportable configuration matrices
Dashboard
Subscriptions Dashboard

Team Rule Subscriptions

Host your organization's masking rules as a single JSON feed and let every team member subscribe with one link. AIgis refreshes feeds automatically, validates every pattern for safety, and can even centrally manage extension settings — always with the user's explicit consent, always strictly one-way.

  • ✓ Automatic daily updates with offline fallback
  • ✓ ReDoS-hardened pattern validation
  • ✓ Consent-based managed settings (🔒 badges)

Protection Statistics

Track exactly how many tokens you've saved and monitor how many sensitive PII elements have been intercepted in your chats over time. Your data stays completely local, but your privacy impact is visualized beautifully.

Statistics Dashboard

Coming Soon: AIgis-Framework

We are abstracting the core logic engine of AIgis into a high-performance Rust library, compiled to WebAssembly.

Soon, you can integrate the AIgis data protection pipeline directly into your own applications. Through Extism, we will provide bindings for a wide variety of programming languages.

Star the Repo for Updates