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ContextOS

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Organize and reuse project details across AI chat platforms without repeated pasting.

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Free to browse · updated 2026-06-14
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What is ContextOS?

This extension helps users maintain consistent project information when switching between different AI models. It captures responses automatically or through selections and organizes them into customizable categories for future use. The system assists with formatting new entries using an integrated AI model that requires a user-provided API key. Workspaces can be created and switched easily, allowing separate sets of rules and parameters for various initiatives. Content from chats gets parsed and filed into relevant buckets, with options to export or import the full structure as needed. Injection happens directly into chat inputs on the active platform, optionally combined with additional instructions. All operations stay confined to the browser environment with no external data transmission. This approach supports compliance with browser extension standards and prioritizes user control over sensitive project materials.

Key features

Universal Cross-Platform Support across ChatGPT, Claude, Grok, Gemini, and Perplexity
Smart AI Auto-Sync to automatically capture AI responses
AI-Assisted Context Creation powered by Gemini 2.5 Flash
Bring Your Own Key (BYOK) for Gemini API
Smart Workspace Organization by project
Instant Parameter Injection and JSON Import & Export
100% Local Processing with zero server data collection

AI models ContextOS uses

Gemini 2.5 Flash
used internally for AI-assisted context creation and auto-parsing (BYOK Gemini API key required)

What you can use ContextOS for

Cross-Platform Context Sync

Manage and inject structured project rules, tech stacks, and schemas into ChatGPT, Claude, Grok, Gemini, and Perplexity without repeated copy-pasting.

Local Workspace Organization

Group system instructions, project descriptions, and custom data rules into isolated workspaces organized by project for developers and power users.

Automated Response Capture

Use smart auto-sync to capture AI responses and targeted selections directly into a staging area for parsing and bucketing.

How to use ContextOS

  1. 1Open any supported AI chat interface
  2. 2Launch the ContextOS sidebar panel
  3. 3Add your Gemini API key or skip for now
  4. 4Create a new isolated project workspace
  5. 5Add custom context buckets and core instructions
  6. 6Capture chat turns or selections for auto-sync

ContextOS pricing

Pricing model: Free. Plan details are indicative — check the site for current prices.

Free

Free
  • Universal Cross-Platform Support
  • Smart AI Auto-Sync
  • AI-Assisted Context Creation
  • Bring Your Own Key (BYOK)
  • Smart Workspace Organization
  • Instant Parameter Injection
  • Seamless JSON Import & Export
  • 100% Local Processing

Editor's verdict

Pros

  • +Privacy-first design with fully local, client-side operation
  • +Seamless cross-AI platform context syncing and injection

Cons

  • Requires personal Gemini API key for AI-assisted features
  • Free-tier API keys subject to 15 requests per minute rate limit

Our take: ContextOS is a solid productivity choice. It's valued for privacy-first design with fully local, client-side operation and seamless cross-ai platform context syncing and injection. The main trade-off is requires personal gemini api key for ai-assisted features. A good pick if you want capable AI without a high upfront cost.

Frequently asked questions

It works seamlessly across ChatGPT, Claude, Grok, Gemini, and Perplexity.

Summary

ContextOS is a solid productivity choice. It's valued for privacy-first design with fully local, client-side operation and seamless cross-ai platform context syncing and injection. The main trade-off is requires personal gemini api key for ai-assisted features. A good pick if you want capable AI without a high upfront cost.

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