You just spent 45 minutes in a deep conversation with ChatGPT. You found the perfect architecture for your project. Now you need to share it with Claude for implementation.

What do you do?

Ctrl+A, Ctrl+C? You get a mess of HTML artifacts, broken formatting, and missing code blocks.

Copy each message manually? Life is too short.

Screenshot it? Text in images is where knowledge goes to die.

AI conversations are the new unit of knowledge work. But moving them between tools feels like faxing a PDF in 2026.

CtxPort fixes this. One click, and your entire conversation becomes a clean, structured Markdown document -- ready to paste into any AI tool, editor, or knowledge base.

 No account required Works offline
 Zero data uploaded 100% local processing
 Minimal permissions Open source (MIT)

graph LR
 A["AI Conversation<br/>(ChatGPT, Claude, etc.)"] --> B["CtxPort<br/>Browser Extension"]
 B --> C["Context Bundle<br/>Structured Markdown"]
 C --> D["Another AI Tool"]
 C --> E["Your Notes / Docs"]
 C --> F["Team Chat / PR"]

1. Browse any supported platform
2. Click the CtxPort copy button (or press Alt+Shift+C)
3. Paste your structured Context Bundle anywhere

That's it. No configuration. No sign-up. No cloud.

Most copy tools make you open a conversation first. CtxPort lets you hover over conversations in the sidebar and copy them directly. Need to grab 5 conversations for a project brief? Hover, click, hover, click. No page loads. No waiting.

Every copy produces a structured Markdown document with frontmatter metadata:

---
ctxport: v2
source: chatgpt
url: https://chatgpt.com/c/abc123
title: "Discuss REST API Authentication"
date: 2026年02月07日T14:30:00Z
nodes: 24
format: full
---
## User
I'm building a SaaS product and need to choose between
API key auth and OAuth2. What do you recommend?
## Assistant
Based on your scenario, I'd recommend a layered approach...

The frontmatter tells any receiving tool exactly where this conversation came from, when it happened, and how many messages it contains. Structured context, not just raw text.

Coming soon -- currently in development. Star the repo to get notified!

# Clone the repo
git clone https://github.com/nicepkg/ctxport.git
cd ctxport
# Install dependencies
pnpm install
# Build all packages
pnpm build
# Start the extension in dev mode
pnpm dev:ext

Then load the unpacked extension from apps/browser-extension/dist/chrome-mv3-dev in chrome://extensions.

1. Navigate to any supported platform (ChatGPT, Claude, Gemini, DeepSeek, Grok, GitHub)
2. Start or open a conversation
3. Click the CtxPort copy button that appears in the chat, or press Alt+Shift+C
4. Paste your Context Bundle wherever you need it

For sidebar list copy: hover over any conversation in the left sidebar to reveal the copy icon.

• ChatGPT support
• Claude support
• Gemini support
• DeepSeek support
• Grok support
• GitHub Issues & PRs support
• Sidebar list copy
• Multiple copy formats
• Keyboard shortcuts
• Chrome Web Store release
• Firefox support
• Context Bundle import (paste a bundle to restore conversation context)
• Batch export (select multiple conversations, export as a bundle)
• Custom format templates

ctxport/
 packages/
 core-schema/ # Zod schemas for Context Bundle format
 core-plugins/ # Platform adapters (ChatGPT, Claude, etc.)
 core-markdown/ # Markdown serialization engine
 shared-ui/ # Shared React components
 apps/
 browser-extension/ # WXT + React 19 + Tailwind CSS 4

Built as a monorepo with pnpm workspaces and Turborepo. Each platform adapter is a self-contained plugin, making it straightforward to add new platforms.

Contributions are welcome! Whether it's a bug report, feature request, or pull request -- every contribution helps.

# Fork and clone the repo
git clone https://github.com/YOUR_USERNAME/ctxport.git
# Install dependencies
pnpm install
# Start development
pnpm dev:ext

See CONTRIBUTING.md for detailed guidelines.

MIT -- Use it however you want.