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Run AI on your computer

WebLLM

Runs AI chat models directly inside your web browser, with no server needed.

Research-backed

What it does

WebLLM runs language models inside a web browser, using your computer's graphics chip through a technology called WebGPU. Because nothing goes to a server, conversations stay on your device.

Developers can build it into websites using the same commands as OpenAI's service. You can try it at the WebLLM Chat demo site.

Who it's for

Web developers building private AI features, and anyone curious to try in-browser AI.

Can I use it without coding?

Developers only. A JavaScript library for developers. The demo chat site works in a modern browser. New to this? Start here.

Can I run it?

Cost
FreeNothing to pay or sign up for.
Runs on
Web browser
Privacy
Runs on your own device: your data stays with you
API key
Not needed

Try it

  1. Try the WebLLM Chat website to chat with an AI model running inside your browser.

Using Claude Code, Cursor or another AI coding assistant? Paste the prompt and it will walk you through the setup.New to this?

Before you install

  • Only download from the official GitHub page. Copies with similar names exist for many popular projects.
  • License (Apache-2.0): Permissive: free to use, change and share, including for business.
  • More on staying safe

Where people are talking about it