Your Secrets Stay on Your GPU: Building a Private, Local Mental Health AI with WebLLM and React

Short summary

This tutorial demonstrates building a privacy-first mental health AI assistant using WebLLM to run Llama-3-8B entirely in the browser via WebGPU, ensuring sensitive data never leaves the user's device. It covers React integration with MLCEngine, context-based state management, and IndexedDB for encrypted conversation history. The approach eliminates server-side data breach risks but requires WebGPU-capable hardware and Chrome 113+.

• •WebLLM runs Llama-3-8B in-browser via WebGPU, keeping mental health data fully local
• •React Context manages the MLCEngine instance; IndexedDB stores encrypted history
• •Requires WebGPU-capable GPU and Chrome 113+; includes a promotional link to WellAlly Blog

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