LLMnesia

Free Chrome extension — local-first

Stop losing answers in AI chats.

LLMnesia is a free Chrome extension that privately indexes your AI chats on this device, so you can instantly find past answers from ChatGPT, Claude, Gemini, Perplexity, and more.

Add to Chrome — Free See how it works

After installing

  1. Open/pin LLMnesia from the Chrome extensions puzzle icon.
  2. Let it backfill your AI chat history locally.
  3. Press Cmd/Ctrl + Shift + 9 and search across your chats.

Your conversations stay on this device.

Works with ChatGPT Claude Gemini Perplexity + 6

No account. No cloud upload. Your conversations stay on this device.

01 — the problem

Sound familiar?

If you use AI every day, this probably sounds familiar.

  • "I already solved this. Where was it?"
  • "Was that answer in ChatGPT or Claude?"
  • "I wrote the perfect prompt last week. Now it's gone."
  • "Why am I asking the same question again?"

Your AI chats already contain real work. LLMnesia helps you find it again.

02 — demo

See it in action

Open one search box. Type a few words. Instantly see matching results from ChatGPT, Claude, Gemini and more, then jump straight to the exact message you need.

LLMnesia search overlay showing results from multiple AI platforms in a single browser window

Search across supported AI chat history with Cmd/Ctrl + Shift + 9.

03 — how

How it works

One-click import for your ChatGPT and Claude history. After that, LLMnesia indexes supported tools automatically as you work.

1

Install the Chrome extension

Free, takes a few seconds. No account required.

~10s · once

2

Import your history, then keep chatting

Bring in existing conversations, then let supported tools index automatically as you use them.

automatic · local

3

Press Cmd/Ctrl + Shift + 9 to search

Search your AI chat history locally and jump straight to the exact message.

instant · private

04 — audience

Built for people who live in AI chats

If you use multiple AI tools every week, your best work is probably scattered across dozens or hundreds of conversations. LLMnesia turns that messy chat history into something you can actually search and use.

  • Founders
  • Developers
  • Researchers
  • Writers
  • Analysts
  • Anyone using AI for real work

05 — features

How LLMnesia saves you time

You already solved this in AI. LLMnesia helps you find it again.

Stop repeating yourself to AI

Your old answers, prompts, and decisions are already there. LLMnesia helps you find them instead of starting over.

Recover ideas and decisions instantly

Search across ChatGPT, Claude, Gemini and more from one place, with results stored locally for speed and privacy.

Land on the exact message

Jump straight to the message you need, not just the conversation. No endless scrolling.

Search without breaking your flow

Open search with a shortcut, find what you need, and get back to work in seconds.

Own your knowledge

Export and back up your conversation history so your AI work stays yours.

Private by default

No accounts, no cloud sync, no conversation uploads. Your archive stays on your device.

Add to Chrome — Free

Free to use. Install in seconds.

06 — platforms

Works across the AI tools you actually use

Search conversations across leading AI platforms from one place.

Supported now

  • ChatGPT
  • Claude
  • Gemini
  • Perplexity
  • DeepSeek
  • Grok
  • Mistral
  • Kimi
  • Qwen
  • Google AI Studio

Are we missing your favourite LLM? Send us a message to let us know!

07 — privacy

Local-first. Private by design.

LLMnesia stores your indexed conversations on your device, not on our servers.

Stored locally

Your data lives in your browser.

No servers

Nothing is uploaded, synced, or sent to the cloud.

You're in control

Export or delete everything with one click.

Designed for people who value privacy.

What each browser permission does
  • Storage - saves your index and settings locally in your browser
  • Tabs - opens the right conversation when you click a search result
  • Active tab - detects which AI platform you're currently visiting
  • Scripting - adds the search bar and index indicator to AI chat pages

No permission is used to read data from any site other than the supported AI platforms.

08 — performance

Built to stay out of your way

LLMnesia is designed to be lightweight, fast, and unobtrusive while you work. Search appears when you need it, not as another bloated dashboard competing for attention.

Local Everything on your device
Instant Millisecond search
Zero Cloud servers

09 — vs second brains

Not another "second brain"

Other tools ask you to save things. LLMnesia is already where you save things.

Other tools
LLMnesia
Capture
Ask you to save things manually
Indexes your AI chats as you use them
Setup
Require tagging and organizing
Zero — opens to your history
Maintenance
Become another system to maintain
Nothing to keep up
Where it lives
Outside the chat tools you use
Where you already work

10 — feedback

Early tester feedback

"I used to waste 10 to 15 minutes trying to remember which AI tool I'd used for something. Now I type a couple of words and it's there."

Product Engineer

"I can't use cloud note tools for some of my work, so local-first mattered. This gives me search without sending anything anywhere."

Security Consultant

"I jump between ChatGPT and Claude constantly. LLMnesia makes that feel like one searchable workspace instead of two separate histories."

Startup Founder

11 — founder note

Why I built this

I use AI constantly across ChatGPT, Claude, Gemini and other tools. I kept having the same frustrating experience: I knew I'd already solved something, but I couldn't remember where. Useful prompts, answers, ideas, and decisions were disappearing into chat history. I built LLMnesia to fix that for myself. Now I'm opening it up to other people who work the same way.

— Keiran

12 — answers

Frequently asked questions

Is my data stored on your servers?

No. Everything is stored locally in your browser. LLMnesia never sends your conversations, search queries, or personal data to external servers.

How does local indexing actually work?

When you visit a supported AI platform, LLMnesia indexes conversation content locally in your browser storage so it is searchable later. It runs automatically in the background.

Will it index my older chat history too?

Yes. One-click import brings in your existing ChatGPT and Claude history. For other supported platforms, LLMnesia indexes conversations automatically as you open them.

Which AI platforms are supported today?

Supported now: ChatGPT, Claude, Gemini, Perplexity, DeepSeek, Grok, Mistral, Kimi, Qwen, and Google AI Studio. Additional integrations are in progress.

Will it slow down my browser?

LLMnesia is designed to stay lightweight. Indexing happens incrementally in the background while you work.

Can I delete my indexed data?

Yes. You can clear all indexed data with one click from the extension settings.

Can I export my conversations?

Yes. You can export and back up your conversation history in a portable format that you own.

Does it require an account?

No account is required for local indexing and search.

Is it free?

Yes. LLMnesia is completely free to use.

13 — contact

Report bugs or ask a question

Use this form for bugs, problems, or general queries. Your message goes to the founder inbox and your email address is never shown on the public page.