Online Compiler - Multi-Language Cloud IDE: Python, Java, C++, SQL & Web Development

Welcome to Smart Compiler, the high-performance online code editor and compiler created by Archit Bishnoi. Designed as a modern, zero-installation alternative to Programiz, Replit, and OneCompiler, Smart Compiler allows developers, students, and engineers to write, run, and debug code across 16+ languages with real-time interactive input (stdin) and VS Code-grade Monaco editing.

Online Python Compiler - Run Python 3 Online (Py Online)

Looking for a fast, free Python compiler or py online runner? Smart Compiler provides an in-browser Python 3 execution environment with live interactive standard input (input()), loops (while True), conditionals, functions, and standard libraries (math, random, datetime, string, collections). Test Python algorithms, solve coding challenges, and run scripts online without installing Python on your computer.

Online Java Compiler - Compile & Execute Java Online (Java Online)

Smart Compiler's Online Java Compiler runs OpenJDK 17, providing instant cloud compilation for Java developers. Write Object-Oriented Programming (OOP) code, define classes, read interactive user input using java.util.Scanner(System.in) or BufferedReader, and practice data structures like ArrayLists, HashMaps, and LinkedLists online.

SQL & MySQL Online Compiler - Practice Database Queries Online (SQL Online)

Execute SQL statements and relational database operations with our free SQL Online Compiler and MySQL online sandbox. Write queries to create tables, insert records, update data, and test complex queries with SELECT, WHERE, JOIN, GROUP BY, ORDER BY, and aggregate functions with immediate tabular results.

Web Development Online - HTML, CSS & JavaScript Live Playground (HTML Online)

Build, test, and preview frontend web applications with our Web Development Online editor (html online). Features simultaneous split-screen HTML5, CSS3, and JavaScript code authoring with instantaneous real-time preview, responsive mobile/tablet/desktop screen simulation, and console debugging.

Online C & C++ Compiler - GCC 14 with C++20 / C++23 Support

High-speed C++ compiler and C compiler powered by GCC 14. Supports C++20 and C++23 features, the Standard Template Library (STL), vectors, maps, pointers, and memory operations for competitive programming on LeetCode and CodeChef.

Frequently Asked Questions about Smart Compiler

How do I run Python code online with user input?

Select Python 3, write your code using standard input("Prompt: "), and click Run. Smart Compiler will execute your code live and prompt you for input directly in the terminal console.

Is this online compiler free for students and developers?

Yes, Smart Compiler is completely free with no account required, no subscription, and unlimited compilation across all 16+ supported programming languages.

Who developed Smart Compiler?

Smart Compiler was engineered and created by Archit Bishnoi, a software engineer and full stack web developer dedicated to building fast developer tools.

About the Creator: Archit Bishnoi

Archit Bishnoi is a passionate software engineer and full-stack web developer building modern developer tools, compilers, and cloud applications. Visit Archit Bishnoi's official portfolio at architbishnoi-portfolio.vercel.app and connect on GitHub at github.com/Archit0029.

Next-Gen Online Compiler & Cloud IDE • v2.5 PRO

Free Online Compiler: Python (Py Online), Java, SQL & Web IDE

Write, compile, and run code directly in your browser with zero installation. Features live interactive stdin (Programiz parity) for Python online (py online), OpenJDK 17 for Java online, instant tabular results for SQL & MySQL online, and live split-screen Web development (HTML online) with Monaco VS Code editing.

Start Coding Python 3 (Free) Web Dev Lab
100% Free Forever No Sign-Up Needed Zero Installation Programiz Stdin Parity
main.py
def solve(name, score):
    greeting = f"Welcome, {name}!"
    return { "status": "PRO", "score": score * 2 }

user = input("Enter username: ")
print(solve(user, 100))
Interactive Console ● Live 0ms
Enter username: Archit
{'status': 'PRO', 'score': 200}
Skulpt Client Engine Ready

16+

Compilers & Interpreters

0ms

Stdin Prompt Latency

Monaco

VS Code-Grade Engine

100% Free

Unlimited Cloud IDE

POPULAR ONLINE COMPILERS

Instant In-Browser Code Execution

Launch cloud compiler environments designed for learning, coding interview practice, and rapid development.

0ms Live Stdin

Online Python Compiler

Run Python online (py online) with live interactive input(), loops, lists, and standard libraries with zero delay.

Launch Python → Python 3.12
OpenJDK 17

Online Java Compiler

Compile Java online (java online) with Scanner(System.in), full OOP classes, and algorithm data structures.

Launch Java → Java 17
MySQL / SQLite

SQL & MySQL Online

Practice SQL online & MySQL queries. Create tables, insert records, test JOINs and aggregates with instant table output.

Launch SQL → Instant Tables
Live Split Preview

Web Development Online

Edit HTML online, CSS3, and JavaScript with instantaneous live split-screen preview and responsive viewport toggles.

Launch Web Lab → HTML/CSS/JS
MULTI-LANGUAGE COMPILER HUB

Select a Programming Language to Compile

Click any language card to jump straight into its compiler environment with pre-loaded boilerplate templates, auto-complete, and zero-setup execution.

HIGH-PERFORMANCE FEATURES

Engineered for Developers & Students

Designed to give you the speed of a native desktop IDE with zero installations required.

Live Interactive Stdin (Terminal)

Unlike standard online compilers that require pre-feeding all inputs upfront, Smart Compiler provides true inline stdin prompt parity with Programiz. Type answers in real time inside loops and conditional menus.

Skulpt Python 3 & Judge0 Cloud

Hybrid architecture combines client-side Skulpt Python 3.12 for zero latency with Judge0 high-concurrency cloud sandboxes for compiled languages like C++, Java, Rust, and Go.

Monaco VS Code Core

Powered by Microsoft's Monaco Editor — the same engine inside Visual Studio Code. Includes bracket matching, multi-cursor editing, keyboard shortcuts, code folding, and auto-indentation.

Sandboxed Web Dev Playground

Dedicated frontend development environment supporting HTML5, CSS3, and JavaScript with instant live preview. Toggle between Desktop, Tablet, and Mobile viewport frames.

Dynamic URL Routing & SEO

Deep-link to any language with instant URL updates (e.g. /?lang=python, /?lang=java). Share direct code environments with students, classmates, and teammates effortlessly.

Zero Setup, 100% Free

No npm installs, no compilers to download, no Docker containers to spin up, and no account registrations required. Open the website and start compiling your code immediately.

FREQUENTLY ASKED QUESTIONS

Online Compiler Questions & Answers

Everything you need to know about compiling Python, Java, SQL, and Web code online with Smart Compiler.

Where can I run and compile Python code online (py online) with interactive user input?

Smart Compiler offers an in-browser Online Python Compiler (py online / python online) supporting Python 3.12 with real-time interactive input (input()), while-loops, and data structures with zero latency, exactly matching Programiz parity.

How to compile and execute Java programs online (java online) without installing JDK?

With Smart Compiler's Online Java Compiler (java online), you can write Java code in the Monaco editor and execute it immediately using OpenJDK 17 with Scanner(System.in) and full OOP class support.

How to practice SQL and MySQL queries online (sql online & my sql online) for free?

Smart Compiler's SQL Online Editor allows you to write standard SQL and MySQL-compatible statements, create tables, insert data, and run queries with instant tabular output in your browser without setting up database servers.

Can I build and preview Web Development projects (HTML, CSS, JavaScript) online?

Yes, Smart Compiler features a dedicated Web Development Online mode with HTML Online, CSS3, and JavaScript editing, complete with real-time split-screen live preview and responsive device toggles (Desktop, Tablet, Mobile).

Is Smart Compiler a free online compiler alternative to Programiz and Replit?

Yes, Smart Compiler created by Archit Bishnoi is 100% free with no registration, no subscription, and unlimited code executions across 16+ languages with Monaco VS Code editing.

Can I use Smart Compiler for competitive programming in C++ (GCC 14)?

Yes, Smart Compiler provides GCC 14 with C++20 and C++23 standards, full Standard Template Library (STL) support (vectors, maps, sets, algorithms), and high-speed execution for LeetCode and CodeChef practice.

Who developed Smart Compiler?

Smart Compiler was engineered and created by Archit Bishnoi, a software engineer and full stack web developer dedicated to building fast developer tools. Visit Archit Bishnoi's official portfolio.

AB

Archit Bishnoi

Creator & Software Engineer

Hi! I'm Archit Bishnoi, a software engineer and full stack web developer passionate about building ultra-fast cloud tools, online compilers, and modern developer infrastructure. I designed and engineered Smart Compiler to help students and developers write and test code instantly across 16+ runtimes with zero barrier to entry.

Visit Official Portfolio GitHub Profile
main.py Saved
Ln 1, Col 1
Initializing Smart Editor...
OUTPUT CONSOLE Ready
⚡ Welcome to Smart Compiler by Archit Bishnoi! Select your language or example template and click [Run] to compile. All 16+ runtimes are connected and ready.