I built React components that run Qwen2.5 in the browser via WebGPU – no server, no API key, works offline

Dhruvil Chauhan — Fri, 22 May 2026 21:38:38 +0000

Been working on this for a while – open sourced it this week.
It's a React library called Local Ghost that runs Qwen2.5-Coder-0.5B
entirely in the browser via WebGPU (WASM fallback for unsupported
browsers). No server, no API key, no per-query cost.

Three components:

SmartDataGrid – natural language filter/sort over any data array.
Type "show engineers older than 30 sorted by salary" and it generates
a sandboxed JS filter and executes it locally.

SmartForm – paste any unstructured text (receipt, email, bio) and the
model extracts structured JSON to fill form fields.

SmartAnalytics – describe a chart in plain English, get bar/line/pie/
scatter rendered instantly from your data.

Tech: Qwen2.5-Coder-0.5B-Instruct via u/huggingface,
WebGPU with automatic device-lost hotswap to WASM, 5-min idle VRAM
purge, IndexedDB query cache, hardened sandbox (nulls window/document/
fetch/localStorage inside generated code).

Model downloads once (~300MB), cached in CacheStorage forever.

npm: u/dhruvil0210
Demo: https://local-ghost-demo.vercel.app
Docs: https://local-ghost-docs.vercel.app

DEV Community: Dhruvil Chauhan

I built React components that run Qwen2.5 in the browser via WebGPU – no server, no API key, works offline