Next-Gen Online IDE & Compiler

Code smarter.
Build anything.

Learn programming, experiment with code, and run your programs in one powerful online workspace inspired by Visual Studio Code. Zero setup required.

Start Coding NowExplore Languages
14+ Languages
Native & Cloud
Sub-second Run
Instant Feedback
100% Free
No Account Needed
Backbencher Workspace — main.pyOpen Live
1def calculate_primes(limit: int) -> list[int]:
2 """Sieve of Eratosthenes algorithm"""
3 primes = []
4 sieve = [True] * (limit + 1)
5 for p in range(2, limit + 1):
6 if sieve[p]:
7 primes.append(p)
8 for i in range(p * p, limit + 1, p):
9 sieve[i] = False
10 return primes
11
12result = calculate_primes(30)
13print(f"⚡ Primes up to 30: {result}")
14# Output: [2, 3, 5, 7, 11, 13, 17, 19, 23, 29]
stdoutexit code 0 · Python 3.12
✓ 14ms
⚡ Primes up to 30: [2, 3, 5, 7, 11, 13, 17, 19, 23, 29]
Program finished with exit code 0 (14ms).

Supported Ecosystems

14 Online Compilers & Playgrounds

Pick your preferred programming environment. Zero installation, preconfigured runtimes, ready in milliseconds.

Python

3.12

High-level, versatile programming language known for readability.

Cloud ContainerLaunch IDE →

JavaScript

ES2024

The core language of the modern web with instant browser execution.

Browser NativeLaunch IDE →

TypeScript

5.4

Typed JavaScript with in-browser compilation & immediate execution.

Browser NativeLaunch IDE →

HTML / CSS

HTML5

Live responsive browser preview for HTML, CSS, and interactive JavaScript.

Browser NativeLaunch IDE →

C++

GCC 12 (C++20)

High performance systems and competitive programming language.

Cloud ContainerLaunch IDE →

C

GCC 12

Low-level, foundational systems language with pointer arithmetic.

Cloud ContainerLaunch IDE →

Java

OpenJDK 17

Robust object-oriented programming language with multi-platform JVM.

Cloud ContainerLaunch IDE →

Rust

1.78

Memory-safe, high-concurrency systems programming without garbage collection.

Cloud ContainerLaunch IDE →
SQL

SQL

SQLite 3

In-memory database sandbox executing real CREATE, INSERT, and SELECT queries.

SQLite SandboxLaunch IDE →

Dart

3.2

Client-optimized language for fast apps on any platform.

Cloud ContainerLaunch IDE →
php

PHP

8.3

Widely-used server-side scripting language powering web backends.

Cloud ContainerLaunch IDE →

Swift

5.9

Fast, modern, and type-safe language developed by Apple.

Cloud ContainerLaunch IDE →

Kotlin

1.9

Modern, concise programming language for JVM and Android.

Cloud ContainerLaunch IDE →

Why Backbencher.codes?

Engineered for Developers

Unlike cluttered tutorial sites with fake buttons, Backbencher provides a real developer-grade IDE with real compilation output.

Genuine Execution Engine

Real compilers for C, C++, Java, Rust, Swift, Kotlin, Dart, and Python with stdout, stderr, compile diagnostics, exit status, and elapsed millisecond timing.

Monaco Editor Intelligence

Powered by the engine behind VS Code: syntax highlighting, bracket matching, active line highlight, minimap, formatting, and auto-closing.

Multi-File Workspace

Create, rename, and manage multiple files in your browser project tree. Download single files or export your entire project as a ZIP archive.

Double-Isolated Security

Web scripts execute inside strict null-origin sandboxes without access to your cookies or storage. Untrusted code is never run on host servers.

Sub-second Cloud Execution

Optimized micro-container instances and in-memory WebAssembly SQLite engine delivering results in milliseconds.

Interactive Standard Input

Test interactive CLI tools and algorithms with custom stdin inputs for Python, C, C++, and Java without restrictions.

Frequently Asked Questions

Got Questions? We've Got Answers.

Yes. All online compilers, code editors, and learning sandboxes on Backbencher.codes are 100% free with no registration or sign-in required.

Ready to code without limits?

Jump directly into our VS Code-like online compiler. No login, no credit cards, no setup delays.

Launch Online Compiler