Run C++ Code Online — Free Editor & Compiler

C++

C++ Guide & Reference

Online C++ Compiler, Editor & Playground — babelpad.dev

Babelpad.dev is a free, modern web-based C++ online editor and compiler. As a compiled systems programming language, it is ideal for operating systems, high-performance engines, compiler design, and low-level software. It features static compilation, optimized memory management and blazing fast execution speeds, providing developer-friendly features including syntax highlighting, multi-file support, and instant code execution without needing local configuration. The editor is powered by Monaco, the same engine behind VS Code, providing a high-fidelity workspace right inside your browser. Whether you are learning C++, testing a quick snippet, or building a small script, Babelpad.dev is designed to run your C++ code cleanly and instantly.

Key Features

  • Interactive C++ Environment: Run code instantly with real-time stdout, stderr, and execution timings.
  • Multi-file Editor Tabs: Organize your projects across up to 6 different files and tabs.
  • Zero Installation: Write and run code on any device without configuring compilers or virtual environments locally.
  • Easy Sharing Options: Save your projects online or generate stateless, compressed URLs to share with other developers.

Quick Start

  1. Write your C++ code in the main workspace tab. The primary code file is typically named main.cpp.
  2. If your program expects keyboard inputs, navigate to the Input (STDIN) tab in the bottom console panel and write the inputs there.
  3. Click the green Run button at the top-right, or press the keyboard shortcut Ctrl + Enter.
  4. View the output instantly in the Output tab. Compile errors or stack traces will appear under the [STDERR] section.

Frequently Asked Questions (FAQ)

What compiler or interpreter version of C++ is used?

Babelpad.dev executes your code using C++ version GCC 13.2.0. This provides a modern runtime environment with access to standard core libraries.

Can I import external dependencies?

To maintain maximum security and execution speed, only the core standard library of C++ is available. Custom third-party package managers (such as pip, npm, or cargo) are disabled in the playground sandbox.

How do I share my C++ code?

You have two options: Click "Save" to upload the script to the cloud (requires a free account) to get a shareable database link, or select "Copy Stateless URL" from the options menu (three dots) to compress and serialize your entire code directly into the URL, allowing anyone to open it even if the database is offline.

Is babelpad.dev associated with the BabelPad desktop Unicode editor?

No. babelpad.dev is an independent online multi-language code compiler and execution playground. It is completely unaffiliated and unconnected with the classic Windows desktop Unicode text editor BabelPad (developed by BabelStone). Our playground compiles and executes your code securely in sandboxed cloud environments.