We've built something small but mighty, and we're giving it away for free. ChatStash, the browser extension that keeps local backups of your ChatGPT, Claude, and Gemini conversations, is now available for Chrome and Firefox.
We originally made ChatStash to solve a simple problem for ourselves: AI conversations are too valuable to lose. Whether you're debugging code, drafting ideas, or researching, your chat history is full of insights, but it all lives on someone else's servers. So, we built a way to keep it under our own control. And now, you can too.
Why we made ChatStash
AI assistants have become part of daily work for many of us, but they don't treat your data as something you truly own. Chats can vanish when an account gets suspended, when platforms change their policies, or even when you accidentally clear your history.
ChatStash fixes that by automatically saving every conversation to your own browser's local storage. No cloud sync, no accounts to create, no analytics, and no tracking. Just your conversations, safely stored on your device — searchable and exportable whenever you need them.
What it can do
Automatic backups ChatStash quietly saves your ChatGPT, Claude, and Gemini conversations as you chat — no copy-pasting or exporting required.
Search and browse locally Use the built-in sidebar to search by keyword, platform, or date. It even scans inside code blocks and formatted text.
Keep your formatting Your saved chats look just like they did originally — with markdown, lists, and code preserved.
Export on demand When you want to move your archive elsewhere, you can export individual chats or your entire library as JSON.
Private by design Everything happens locally in your browser's IndexedDB. There are no servers, and we don't collect or see any of your data.
Built for developers, researchers, writers — and anyone who chats with AI
If you rely on ChatGPT or Claude for coding help, research, brainstorming, or writing drafts, you've probably wished you could search your old conversations or keep them safe. ChatStash makes that possible without needing another account or service. It's especially handy for developers who build knowledge bases, students who save study notes, and anyone who values having full control over their data.
Try ChatStash today
ChatStash is completely free and available right now:
You can find more details, screenshots, and documentation at 👉 whatpulse.org/tools/chatstash
We hope it helps you keep your AI conversations right where they belong — on your device.
Martijn and the WhatPulse team