code, taught and run properly

Learn Programming & Run Code Online.

CodeyHub teaches you to code with hands-on JavaScript lessons, and RunCode lets you write and run C, C++, Java, JavaScript and Python instantly in your browser. No installs, no signup required.

30 free lessons 5 languages to run 0₹ signup required ⭐ 100% free
you.js
const developer = {
  name: "you",
  knows: ["html", "css", "js"],
  learning: true,
};

// one concept at a time
codeyhub.teach(developer)|

premium resources

Premium Resources for JavaScript Learners

Structured notes, interview prep, and a full roadmap — for learners who want a faster, more organized path through JavaScript.

🎯

JS Interview Questions

100+ real JavaScript interview questions with short, clear answers — beginner to intermediate.

₹19

one-time payment · instant access

  • ✓ 100+ interview questions
  • ✓ Quick, to-the-point answers
  • ✓ Beginner to intermediate
Get Access →
📘

JS Notes Pack

Clean, beginner-friendly notes covering core JavaScript in a fast revision format.

₹19

one-time payment · instant access

  • ✓ Clean beginner-friendly notes
  • ✓ Fast revision format
  • ✓ Covers core JS concepts
Get Access →
🗺️

Full Stack Roadmap

The complete path: HTML → CSS → JavaScript → React → Node → Database → Deployment.

₹29

one-time payment · instant access

  • ✓ Step-by-step learning path
  • ✓ Covers frontend to deployment
  • ✓ Beginner friendly ordering
Get Access →
Show More Resources →

why codeyhub

Built for people who learn by doing

No video lectures. No PDFs. Just you, a browser, and real JavaScript code that runs instantly.

▶

Playground on every page

No separate tab, no setup. Write and run real JavaScript directly inside the lesson and see the console output instantly.

✓

Quizzes that check understanding

Each lesson ends with a short quiz — not to test memory, but to catch the misunderstandings that silent reading hides.

⚙

Run real code instantly

RunCode lets you write and run C, C++, Java, JavaScript and Python right in your browser — no installs required.

featured lessons

Start learning JavaScript today

Hands-on lessons with live code editors. Start from scratch or jump to any topic.

01 beginner

Introduction to JavaScript

What is JavaScript, where does it run, and why learn it?

📖 5 min read 🎯 3 questions
Start lesson →
02 beginner

Variables in JavaScript

let, const, var — and how to choose the right one.

📖 6 min read 🎯 4 questions
Start lesson →
03 beginner

Data Types Explained

Strings, numbers, booleans, null, undefined — and typeof.

📖 5 min read 🎯 4 questions
Start lesson →
View full curriculum →

beyond the lessons

Build. Practice. Get interview-ready.

The full JavaScript roadmap, real projects, common beginner mistakes, and 50 interview questions — all free.

runcode by codeyhub

Run C, C++, Java, JavaScript and Python instantly

Everything runs in your browser. No installs, no signup — just pick a language and start coding.

C

C Compiler

Practice the fundamentals of programming with instant C compilation.

C++

C++ Compiler

Great for DSA practice, OOP concepts and competitive programming.

Jv

Java Compiler

Compile and run Java in your browser — no JDK installation needed.

JS

JavaScript Compiler

Run JavaScript instantly with live console output.

Py

Python Compiler

Ideal for scripting, automation and data-focused beginners.

Explore RunCode →

latest articles

Learn JavaScript beyond the basics

Deep dives, tips, and tricks from experienced developers.

Interview Prep

Top 50 JavaScript Interview Questions

Most commonly asked JS questions with answers and explanations.

📅 Dec 15, 2024 ⏱ 12 min read
Best Practices

10 JavaScript Tips Every Beginner Should Know

Practical tips to write cleaner, more efficient JavaScript code.

📅 Dec 10, 2024 ⏱ 8 min read
Async JS

Understanding Promises and Async/Await

A complete guide to handling asynchronous JavaScript.

📅 Dec 5, 2024 ⏱ 10 min read
Read all articles →