ChatCrystal ChatCrystal
Open Source · Local First

Turn AI Conversations into Searchable Knowledge

Import conversations from your favorite AI coding tools. AI crystallizes them into structured notes with semantic search. Everything stays on your machine.

Download Desktop App
GitHub stars

Works with your favorite AI coding tools

Claude Code
Cursor
Codex CLI
Trae
GitHub Copilot

How It Works

Import

Auto-scan your local AI conversation history

Crystallize

Crystallize

LLM generates structured notes: title, summary, key conclusions, code snippets, tags

Search

Semantic search your knowledge base — find anything, anytime

Everything you need

Semantic Search

Search with natural language, not just keywords

Structured Notes

Structured Notes

Auto-extract titles, summaries, key conclusions, and code snippets

MCP Integration

AI tools query your knowledge base directly

Smart Tags

Smart Tags

Auto-categorize and browse by tags

CLI Toolkit

One set of commands to manage all your knowledge

Desktop App

Desktop App

Runs in system tray, auto-imports in the background

AI ConversationsChatCrystalSQLite (local)Vector IndexYour machine

Your data stays local

Never leaves your machine

SQLite local storage, zero cloud dependency

Fully open source

MIT License, transparent and auditable

You're in control

Choose your LLM provider — supports Ollama for fully local AI

Powerful CLI