OffCode — Offline LeetCode Practice

Practice Blind 75 LeetCode problems completely offline with Python and JavaScript.

Features

• 76 Blind 75 problems with descriptions, starter code, and test cases
• Python execution via Pyodide (WebAssembly) — no server needed
• JavaScript execution via Web Workers
• Monaco code editor with syntax highlighting
• Auto-saves your code locally (IndexedDB)
• Installable as a PWA — works in airplane mode
• Performance tiers (Optimal / Average / Slow)

Quick Start

git clone https://github.com/che4goud/offcode.git
cd offcode
npm install
npm run dev

Production Build

npm run build
npx serve dist

Install as App

1. Open the deployed URL in Chrome/Edge
2. Click the install icon in the URL bar
3. The app works offline forever after first visit

Tech Stack

React 19 • Vite 7 • Monaco Editor • Pyodide • PWA (vite-plugin-pwa) • IndexedDB