sxwangsxwang1/chatpassport

ChatPassport – Move your conversation between AI chat assistants

What it does
ChatPassport is a Chrome extension that lets you copy the visible part (or the full history) of a conversation from one web‑based AI assistant (ChatGPT, Claude, Gemini or DeepSeek) and paste it into a new draft on another assistant. It does the heavy lifting of reading the page, assembling the messages in the correct order, and inserting them into the destination editor, while leaving the final Send action to you.

Why it matters
Switching between large‑language‑model chat services is common – you may hit a context limit, want a second opinion, or simply prefer a different model. Manually copying dozens of messages is tedious and error‑prone. ChatPassport automates the transfer, shows you exactly what will be moved, and respects the destination’s character budget, so you keep full control of the context you provide.

Key features

• Supported assistants – ChatGPT (chat.openai.com, chatgpt.com), Claude (claude.ai), Gemini (gemini.google.com) and DeepSeek (chat.deepseek.com).
• Capture modes – Quick (only the messages currently rendered) or Load history (scrolls the page to collect older messages, up to ~2 minutes).
• Draft preview – After capture you see a coverage notice, message count and an estimate of how many messages will fit in the destination’s ~48 k character limit.
• Selective transfer – Choose to move all captured messages or only the most recent 20/50/100.
• Export / import – Save a conversation locally as Markdown or a .chatpassport.json file (≤ 25 MiB) and later reload it into another session.
• Privacy‑first – No account, no API key, no remote server. All processing happens locally in the browser; only the selected assistant domains are accessed.
• No automatic sending – The extension never clicks Send; you review the draft and press the website’s own button.

How to use it

1. Install from the Chrome Web Store and open a chat on a supported site.
2. Open the side‑panel, pick the destination assistant and a capture mode, then click Prepare for ….
3. Review the captured messages and any coverage warnings.
4. Click Continue in … to open the destination tab, type your next question, then click Add context to draft.
5. Confirm any omitted older messages, review the final draft, and send it manually.

Technical notes

• Built with Manifest V3, using Chrome’s scripting, storage, sidePanel and alarms APIs.
• Source code requires Node 20+ and pnpm; pnpm release:chrome produces a ZIP ready for Chrome Web Store upload.
• One pending transfer is stored in chrome.storage.session and expires after one hour.

Who might benefit?

• Researchers or developers who compare responses from different LLM providers.
• Users hitting context‑length limits on one service and wanting to continue a thread elsewhere.
• Anyone who wants a portable, offline‑editable copy of a chat for later reference.

Links

• Chrome Web Store install
• GitHub repository
• Privacy policy
• JSON format spec