ConfigsApr 1, 2026·2 min read

Jan — Offline AI Desktop App with Full Privacy

Jan is an open-source ChatGPT alternative that runs LLMs locally with full privacy. 41.4K+ GitHub stars. Desktop app for Windows/macOS/Linux, OpenAI-compatible API, MCP support. Apache 2.0.

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Quick Use

Use it first, then decide how deep to go

This block should tell both the user and the agent what to copy, install, and apply first.

# Download desktop app from https://jan.ai
# Available for Windows, macOS, Linux

# Or build from source
git clone https://github.com/janhq/jan
cd jan
make dev

# After installing, Jan provides an OpenAI-compatible API at:
# http://localhost:1337/v1/chat/completions
Intro

Jan is an open-source, offline-first AI application that lets you download and run LLMs with full control and privacy. With 41,400+ GitHub stars and Apache 2.0 license, Jan provides a ChatGPT-like desktop interface for Windows, macOS, and Linux. It supports local models (Llama, Gemma, Qwen from HuggingFace), cloud providers (OpenAI, Anthropic, Mistral, Groq), custom AI assistants, Model Context Protocol (MCP) integration, and an OpenAI-compatible API at localhost:1337.

Best for: Users wanting a private, offline ChatGPT alternative with a polished desktop UI Works with: Claude Code, OpenAI Codex, Cursor, Gemini CLI, Windsurf Platforms: Windows 10+, macOS 13.6+, Linux (deb, AppImage, Flathub)

Key Features

  • Desktop app: Polished chat UI for Windows, macOS, Linux
  • Complete privacy: All local inference, no data leaves your machine
  • Local + cloud models: HuggingFace models locally, OpenAI/Anthropic/Mistral via API
  • OpenAI-compatible API: localhost:1337 for drop-in integration
  • MCP support: Model Context Protocol for tool integration
  • Custom assistants: Create specialized AI personas
  • Multiple stores: Microsoft Store, Flathub, direct download

FAQ

Q: What is Jan? A: Jan is an open-source ChatGPT alternative with 41.4K+ stars that runs LLMs locally with full privacy. Desktop app for all platforms, OpenAI-compatible API, MCP support. Apache 2.0.

Q: How do I install Jan? A: Download from jan.ai for Windows/macOS/Linux. Also available on Microsoft Store and Flathub. Models download automatically in-app.

🙏

Source & Thanks

Created by Jan HQ. Licensed under Apache 2.0. janhq/jan — 41,400+ GitHub stars

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