Ollama + Open WebUI

About Ollama + Open WebUI

Frequently asked questions

What is Open WebUI?

Open WebUI is a feature-rich, self-hosted web interface for interacting with LLMs. Combined with Ollama, it provides a ChatGPT-like experience running entirely on your own hardware — with chat history, model switching, RAG, and multi-user support.

Can multiple users share the same Ollama + Open WebUI instance?

Yes, Open WebUI supports multiple user accounts with individual chat histories, settings, and model preferences. Admins can control which models are available and set usage policies per user or role.

Does Open WebUI support document chat (RAG)?

Yes, Open WebUI has built-in RAG (Retrieval-Augmented Generation). You can upload PDFs, text files, and web pages, then chat with the AI about your documents. It chunks, embeds, and retrieves relevant context automatically.

How much disk space do Ollama models need?

Model sizes vary: Llama 3 8B uses ~4.7GB, Mistral 7B uses ~4.1GB, and Llama 3 70B uses ~40GB. Plan your disk space based on which models you want available. Models are stored in the Ollama data directory and can be removed when no longer needed.