Context Bridge
Chrome extension for secure AI conversation portability with local AES-256-GCM encryption
A Chrome extension that captures conversation text from AI chat websites and injects it into other platforms. All data is encrypted locally using AES-256-GCM - nothing is transmitted to external servers.
| Install from Chrome Web Store | Privacy Policy |
Key Features
- Cross-platform capture - Extracts conversation text from 6 AI platforms via DOM parsing
- Local encryption - All stored data encrypted with AES-256-GCM (100k PBKDF2 iterations)
- Smart pruning - KadaneDial algorithm trims long conversations to fit context limits
- PII protection - Detects and masks emails, phones, SSNs, and credit card numbers
- Data portability - Export/Import encrypted backups
Technical Details
| Component | Technology |
|---|---|
| Language | TypeScript |
| Platform | Chrome Extension (Manifest V3) |
| Encryption | AES-256-GCM, PBKDF2 (100k iterations) |
| Crypto API | Web Crypto API |
| Build Tool | esbuild |
How It Works
- Capture - Parses DOM structure of supported AI chat interfaces
- Encrypt - Secures conversation data locally using Web Crypto API
- Transfer - Injects context into target platform’s input field
- Prune - Intelligently trims content to respect token limits