Practice coding algorithms 100% offline with AI: generate problems, get hints, discuss solutions, and run code in JavaScript, TypeScript, or Python — no internet or setup required.
Everything you need to ace your coding interviews, without internet dependency
Practice on flights, trains, or anywhere without internet. Your coding practice never stops.
WASM-powered code execution runs directly in your browser. No server round-trips needed.
Monaco Editor with syntax highlighting, autocomplete, and all the features you love.
AI Problem Generator + AI Chat for hints + AI Solution with multiple approaches—configurable providers in Settings (DeepSeek/OpenAI/Claude/Qwen/Ollama).
Track your progress with daily statistics, accuracy metrics by difficulty and tags, contribution heatmap, and performance trends.
Available for Windows, macOS, and Linux. Same great experience everywhere.
Write solutions in your preferred programming language
Native browser execution with full ES6+ support
Real-time transpilation with type safety
Pyodide WASM for CPython compatibility
Free and open source. No account required.
Version 0.2.1
Version 0.2.1
Version 0.2.1
Generate new problems, ask for contextual hints while you code, and generate full annotated solutions with multiple approaches. All AI features share the same provider settings so you can switch models anytime.
// AI Chat (contextual hints):
"Give me a hint based on my current code..."
"What data structure should I use here?"
// AI Solution (multiple approaches):
function solution(input) {
/* Approach 1: Brute force with detailed notes */
/* Approach 2: Optimized solution (recommended) */
/* Time/Space complexity + trade-offs */
}