Run Code Online — VS Code Extension

Compile and run code in 28+ programming languages directly from VS Code using an online compiler API. With AI-powered code analysis, custom input support, and seamless editor integration.

Supported Languages

Category	Languages
Systems	C, C++, Rust, Go, D, Assembly (NASM x86-64)
JVM	Java, Kotlin, Scala, Groovy
Scripting	Python, JavaScript, TypeScript, Ruby, PHP, Perl, Lua, Bash
Functional	Haskell, OCaml, Erlang, Elixir, Racket
Enterprise	C#, Pascal, Fortran
Data Science	R, Prolog

The extension auto-detects the language from your file extension. See the backend README for the full list of 28 language keys and their extensions.

Features

• 28+ languages — C, C++, Python, Java, JavaScript, Go, Rust, TypeScript, Kotlin, Scala, Ruby, PHP, Haskell, and many more
• Dynamic language discovery — Auto-fetches supported languages from the API server on startup
• AI-powered analysis — Optional Deepseek AI integration that analyzes your code for bugs, suggests fixes, and explains errors
• Custom input — Enter stdin input inline via dialog, read from input.txt, or run without input
• Output channel — Results are displayed in a dedicated VS Code output channel (with optional file output)
• Progress indicator — Visual progress notification while your code runs
• Status bar integration — One-click run from the status bar, shows the current language
• Keyboard shortcut — Ctrl+Alt+R (Cmd+Alt+R on macOS)
• Context menu — Right-click in the editor to run with/without input
• Editor title button — Run button in the editor title bar
• Configurable API URL — Point to your own server or the public one
• Auto-save — Automatically saves your file before sending it

Installation

1. Launch VS Code
2. Go to Extensions (Ctrl+Shift+X)
3. Search for Run Code Online
4. Click Install

Usage

Quick Run

1. Open a code file (.py, .cpp, .java, .js, etc.)
2. Press Ctrl+Alt+R (or Cmd+Alt+R on macOS)
3. Choose how to provide input (or skip)
4. View results in the Output panel

Other Ways to Run

Method	Action
Status bar	Click the ▶ Run <Language> button in the status bar
Command Palette	Ctrl+Shift+P → Run Code Online
Right-click	Right-click in the editor → Run Code Online
Editor title	Click the ▶ icon in the editor title bar
With input	Command Palette → Run Code Online (with input)
No input	Command Palette → Run Code Online (no input)

Providing Input

The extension offers three input modes:

• Enter custom input — Type stdin data in an input box
• Read from input.txt — Auto-reads input.txt from your file's directory
• No input — Runs the program without stdin

AI Analysis

Enable AI-powered code analysis in Settings (Ctrl+,):

• Set codeOnline.analyze to true
• The server must be configured with a Deepseek API key
• Analysis results appear at the bottom of the output

Output

• Results are displayed in the Output panel (View → Output → select "Run Code Online")
• A copy is also saved as <filename>-output.txt in the same directory

Settings

Setting	Type	Default	Description
codeOnline.apiUrl	string	https://load-balancer-1l8h.onrender.com	API server URL
codeOnline.analyze	boolean	false	Enable AI code analysis
codeOnline.showHeader	boolean	true	Show info header in output

Feedback and Support

For issues, suggestions, or feature requests:

• Email: benmeehan111@gmail.com
• Source: github.com/benmeehan/gomult

Enjoy coding with Run Code Online!