PolicyLock LLM

A Chrome Extension for restricting access to AI and Large Language Model (LLM) services in managed, educational, and enterprise environments.

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Overview

PolicyLock LLM provides centralized control over access to modern AI services through Chrome's Declarative Net Request API.

The extension can prevent access to conversational AI platforms, image generation services, video generation platforms, and other AI-powered tools by redirecting requests to a customizable block page.

Typical use cases include:

• Educational environments
• Corporate compliance requirements
• Examination and assessment systems
• Managed workstations
• Research environments requiring AI restrictions

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Features

Access Control

• Block access to popular AI platforms
• Categorized filtering (Text, Image, Video)
• Dynamic rule generation
• Local configuration storage

Security Controls

• Password-protected configuration
• Hard Block mode
• Self-lock functionality
• Persistent protection across browser restarts

User Experience

• Modern management interface
• Dark mode support
• Localization support
• Custom block page

Registry-Based Architecture

• External AI service registry
• Simplified service maintenance
• Community-driven service updates
• GitHub Issue workflow for missing platforms

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Supported Categories

Category	Examples
Text AI	ChatGPT, Claude, Gemini, Grok, DeepSeek, Perplexity
Image AI	Midjourney, Leonardo AI, Ideogram, CivitAI
Video AI	Runway, Kling, Hailuo, Luma, Sora

The complete service registry is maintained separately and can be expanded without redesigning the extension architecture.

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Installation

From Source

git clone https://github.com/mrf0rtuna4/PolicyLockLLM.git

1. Open:

chrome://extensions

2. Enable Developer Mode
3. Select Load unpacked
4. Choose the repository directory

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Configuration

The extension stores its configuration locally using:

chrome.storage.local

Available options:

Setting	Description
Blocking	Enable or disable AI service restrictions
Category	Select AI service category
Password	Administrator protection
Hard Block	Prevent disabling without password

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AI Service Registry

PolicyLock LLM uses a registry-based model.

Example:

{
  "id": "chatgpt",
  "name": "ChatGPT",
  "company": "OpenAI",
  "category": "text",
  "domains": [
    "chatgpt.com"
  ]
}

The registry can be distributed through:

• GitHub Raw
• CDN
• Internal enterprise infrastructure

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Missing a Service?

AI platforms evolve rapidly.

If a service is not currently covered by the registry, please open an issue:

https://github.com/mrf0rtuna4/PolicyLockLLM/issues/new

Include:

• Service name
• Primary domain
• Category (Text / Image / Video)
• Optional documentation links

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Project Structure

PolicyLockLLM/
├── _locales/
├── scripts/
│   ├── main.js
│   ├── themes.js
│   └── i18n.js
├── blocked.html
├── main.html
├── manifest.json
├── llms.json
└── background.js

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Limitations

PolicyLock LLM is implemented as a browser extension and should not be considered a complete endpoint-control solution.

Users with administrative access to the operating system or browser may still remove or modify the extension.

For stronger enforcement, consider:

• Chrome Enterprise Policies
• Microsoft Edge Management Policies
• Managed Browser Deployments
• Endpoint Management Solutions

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Privacy

PolicyLock LLM does not:

• Collect analytics
• Track browsing activity
• Send user data to external servers
• Store information outside browser storage

All configuration is stored locally unless a custom registry source is configured.

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License

See the LICENSE file for details.