Memdex: A browser extension that saves AI chat history locally for reuse across ChatGPT, Claude, and Gemini
By
Andrew chan
A weekday bagel. Dependable, satisfying, no fuss.
Summary
Memdex is a Chrome browser extension that automatically saves AI conversations from ChatGPT, Claude, and Gemini into encrypted local storage (IndexedDB) on the user's laptop. It underlines reusable context in new prompts (similar to Grammarly's typo detection) and allows one-click injection of past context. The tool addresses the pain point of having to re-explain projects, constraints, and voice in every new chat, while keeping memory local and model-agnostic. It's free for the 10 most recent chats, with a Pro tier for unlimited use.
Key quotes
· 5 pulledEvery new chat starts at zero. I keep re-explaining the same project, the same constraints, the same voice.
My 'memory' lives in someone else's cloud — locked to one model, invisible, unmovable.
The existing fixes are heavier than the problem: vector DBs, accounts, settings panels, prompts called /remember.
Memdex is a browser extension that does three things, automatically: Saves every chat on ChatGPT, Claude, Gemini, Perpl
One click to inject when you need it just like grammarly.
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