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A step-by-step guide on how to run LLMs locally on Windows, Linux, or macOS using Ollama and Open WebUI – without Docker. This guide will show you how to easily set up and run large language models (LLMs) locally using Ollama and Open WebUI on Windows, Linux, or macOS – without the need for Docker. Ollama provides local model inference, and Open WebUI is a user interface that simplifies interacting with these models. The experience is similar to using interfaces like ChatGPT, Google Gemini, or Claude AI.