LM Studio is a desktop application for running large language models locally on your own computer — no internet connection or API key required. It supports GGUF-format models from Hugging Face, features a ChatGPT-like chat interface, a built-in model browser, and an OpenAI-compatible local server for connecting local AI to apps like Continue, Cursor, or custom scripts. LM Studio runs on Mac (Apple Silicon and Intel), Windows, and Linux, automatically leveraging GPU acceleration via Metal, CUDA, or Vulkan. It is the most popular tool for local LLM deployment among non-technical users and developers alike.