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Pyodide WASM
Client-Side IDE & Computer Science Learning Workbench

VAB-CODE – Practice, Code & Compile in Any Programming Language

VAB-CODE is an online coding and computer science learning platform with interactive programming tools and curriculum-based labs. Practice Python, C, C++, Java, Web, and ARM Assembly directly in your browser with instant client-side execution and complete privacy.

Start Coding Now Explore Labs & Modules
8 Runtimes
80+ Practice Codes
40 CV Experiments
100% Client-Side & Free
READY TO RUN
Interactive Code Editor

Python 3.11 WASM, SQLite WASM, C/C++ lab simulator, Java lab simulator, and live DOM rendering with real-time output.

Jump to Workspace ↓

Curriculum Practical Labs by Engineering Department

All 84 Curriculum Experiments →

4-Step Engineering Learning Path

From department curriculum to hands-on practice & verified progress
1 Choose Department

Pick CSE, IT, ECE, AI & DS, or Cybersecurity to tailor your university syllabus track.

Select Dept ↓
2 Explore Labs

Browse 84 curriculum experiments organized by semester with flowcharts & interactive theory.

Browse Catalog →
3 Code & Practice

Execute code instantly in Python WASM, C/C++, Java simulators, or solve arena problems.

Start Coding ↓
4 Track in Dashboard

Monitor total XP, daily streaks, quiz scores, and generate verifiable milestone certificates.

Open Dashboard →

Supported Languages & Environments

Click any language to load the runtime and jump straight to the editor
8 Runtimes
PY
Pyodide WASM (Real)

Python 3.11

NumPy, Matplotlib, OpenCV, Pandas & scientific libraries in-browser.

Select & Code
C
Lab Simulator

C Language

Pointers, memory management, dynamic structures & graphics.h simulation.

Select & Code
C++
Lab Simulator

C++

Standard Template Library, vectors, maps, stacks & algorithm simulation.

Select & Code
JAVA
Lab Simulator

Java

Object-oriented programming, classes, inheritance & university lab simulation.

Select & Code
HTML
Browser Sandbox

HTML5

Semantic page structures, canvas rendering & instant live preview.

Select & Code
CSS
Browser Sandbox

CSS3

Flexbox, Grid layouts, keyframe animations & responsive design.

Select & Code
JS
Browser V8 (Real)

JavaScript

Modern ES6+ syntax, asynchronous JS, DOM manipulation & client sandbox.

Select & Code
SQL
SQLite WASM (Real)

SQL (SQLite)

Relational DBMS, joins, subqueries, group by & university schema in-browser.

Select & Query

Curriculum Labs & Specialized Modules

Specialized curriculums with starters, testbeds & printable exports
13 Specialized Hubs
Starter Templates

Data Structures & Algorithms

Linked Lists, Binary Trees, Stacks, Queues, Graphs, Sorting & Dynamic Programming with 1-click code injection.

40 Experiments

Computer Vision & OpenCV

Grayscale, Canny edge detection, morphological filters, transformations & face tracking rendered on live canvas.

80 Solved Codes

University Practice Lab

20 solved core lab problems across Python, C, C++, and Java: Primes, Fibonacci, Matrix math & Binary Search.

Daily Brain Work

Daily Mind Work & Puzzles

Sharpen your analytical skills with tricky code output puzzles, execution tracing, and instant in-depth explanations.

Universal AI

Cross-Language Transpiler

Universal zero-cost code converter: instantaneously convert any Python logic into Java, C, or C++ with correct syntax.

Printable PDF

Lab Record PDF Generator

Generate official college practical lab records complete with Aim, Algorithm, Code, Terminal Output, and Marks Sheet.

ARM LPC-1768 Kit

Embedded Systems Lab

ARM Cortex-M3 kit simulator: 7-segment display (0–F), 8 LEDs (P0.4–P0.11), buzzer & USB laptop-to-hardware link.

14 Subjects (A–N)

Full Computer Science Labs Directory

Comprehensive catalog across 14 subjects: DBMS SQL, OS Scheduling, Networks, AI/ML, Cybersecurity, Cloud, and Software Engineering with standard 18-point format.

Browse All 14 Labs
Interactive DSA

Advanced DSA Playground

Interactive BST, Heaps, Hash Tables with collision probing, Graph BFS/DFS, Dijkstra, and sorting comparisons with step-by-step state inspection.

Open DSA Visualizers
DB & Networks

Database & Networking Toolkit

Visual ER diagram builder with SQL DDL export, in-browser SQLite auto-grader, IPv4 subnet calculator, TCP/IP handshake, and DNS simulator.

Open DB & Net Toolkit
Coding Arena

Coding Challenge Arena

Curated programming problems with visible sample cases, hidden boundary checks, optional timed practice, and local progress tracking.

Start Practice Arena
AI & Data Science

AI & Data Science Playground

Interactive browser demonstrations: Linear regression OLS/Gradient Descent, KNN classification, Decision Trees, K-Means, and Confusion Matrix metrics.

Explore AI Lab
Semester Prep

University Exam Prep Centre

Topic-wise CS MCQs, revealable flashcards, timed mock tests with question palette, and printable A4 revision sheets for fast revision.

Open Exam Prep
READY TO RUN Click to jump directly to editor
In-Browser Code Editor & Output Console
Input & Output Below ↓
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Quick Start: Select any programming language and click "Run Code" to execute client-side in WebAssembly with real-time console output.
main.py
Saved
1
Ln 1, Col 1
Python 3.11
Ctrl+Enter to run
Code Scroll
🐍 Python
Console Scroll
Custom Input (stdin) scanf • cin • input()
Welcome to VAB-CODE (vab-code)! Select a language, write your code, and hit Run.
Ready 0ms
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PLATFORM OVERVIEW

What is VAB-CODE?

VAB-CODE is an online coding and computer science learning platform created to make programming education accessible and barrier-free. It provides in-browser coding practice across popular languages alongside interactive learning tools, algorithm visualizers, and curriculum-aligned computer science labs. By running directly in the browser with zero server setup, VAB-CODE gives students and developers an instant, private workbench to learn, practice, and test code.

Learn more about our mission & architecture →

High-Speed WebAssembly Compilers

VAB-CODE runs code directly in your browser using client-side WebAssembly technology. Practice Python 3.11 with full support for scientific packages (NumPy, Pandas, Matplotlib), ANSI C99, ISO C++17 with STL, and Java 17 OOP without needing any desktop installation or remote server dependencies.

DSA & Algorithm Curriculum

Designed for computer science students and developers. Includes coding challenges covering Data Structures (Linked Lists, Binary Trees, Stacks, Queues), Sorting Algorithms (Quick Sort, Merge Sort, Bubble Sort), and Computer Graphics with graphics.h canvas rendering.

Zero-Data Logging & Privacy First

Your academic code and projects remain 100% private on your own device. VAB-CODE operates with zero backend code logging, storing your snippets only in browser localStorage. Export printable Lab Record PDFs and share code with peers effortlessly.

Frequently Asked Questions (FAQ)

Is VAB-CODE completely free for students?

Yes. VAB-CODE is 100% free forever for all college students, faculty members, and self-taught developers. There are no subscriptions, paywalls, or hidden compile limits.

Can I use VAB-CODE for my college practical exams and lab records?

Absolutely. You can write, test, and debug code directly, and use the "Lab PDF" button to export a university-formatted experiment sheet complete with Aim, Algorithm, Source Code, Output, and Evaluation marks table ready to print.

How does VAB-CODE execute code without backend servers?

VAB-CODE compiles Python via Pyodide WebAssembly, runs web applications in isolated sandbox iframes, and transpiles C, C++, and Java syntax through client-side simulation engines directly on your machine's CPU.