LLMnesia
Searches your ChatGPT, Claude and Gemini history from one local index, no account needed.
LLMnesia is a browser extension that indexes your chat history across ChatGPT, Claude, Gemini, Perplexity, Copilot, DeepSeek, Grok, Mistral and more, so one search jumps straight to the exact message instead of the whole conversation. The free tier runs entirely on-device — no account or cloud required — and an optional paid Vault adds end-to-end encrypted sync and backup across devices. It only works in Chrome and Edge.
What holds up
- +Free tier needs no account and runs fully local — nothing about your chats leaves the device
- +Searches across nine-plus AI platforms at once instead of checking each one separately
- +Jumps to the exact message, not just the conversation — no scrolling through old chats
- +Optional Vault adds end-to-end encrypted sync if you want history on more than one device
Mind the limits
- −Chrome and Edge only — Firefox and Safari users can't install it
- −Free index lives on one device only — switch machines and you lose it without Vault
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