Kontext Review 2026: Move an AI Chat's Full Context to Another Tool

Hitting a chat limit mid-task shouldn’t mean losing everything. Kontext is built for that exact moment.

What is Kontext?

Kontext is an open-source Chrome extension (MIT, ~23 stars) that captures a full conversation from ChatGPT or Claude using the platform’s own API — not lossy DOM scraping — summarizes it on-device with Chrome’s Gemini Nano, and produces a structured “kontext” (Goal · Current state · Decisions · Key facts · Code · Open threads) you can paste into any other AI to resume seamlessly.

Key features

• Full-fidelity API capture: reads the platform’s own conversation API for every turn of the active branch
• On-device summarization via Gemini Nano: free, private, no API key required
• BYOK fallback chain: OpenAI, Anthropic, Gemini, OpenRouter (free tier) plus a raw-transcript fallback
• Structured kontext format designed for AI-to-AI handoff
• Local kontext library with search, re-summarization, and export
• Privacy-first: zero telemetry, minimal permissions, local storage only

Who should use it?

Anyone who bounces between AI tools and hates re-explaining context, or who hits chat limits and needs to continue elsewhere without losing the thread.

Pros and cons

Pros: solves an acute, real pain point; API capture is architecturally superior to scraping; on-device privacy is exemplary; thoughtful fallback chain means no dead ends.

Cons: very early-stage, single contributor; not on Chrome Web Store (build from source, Node 20+); only ChatGPT and Claude today; relies on undocumented platform APIs that could break; no MCP server yet.

Pricing

Completely free and open-source (MIT). On-device summarization costs nothing; BYOK is optional.

FAQ

Do I need an API key? Not for the default on-device Gemini Nano summary. BYOK is only needed if you want cloud summarization.

Why build from source? It’s not on the Chrome Web Store yet; you clone, build with Node 20+, and load it unpacked.