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Write code. Press run. See output.

A fast online compiler and interpreter for 16 languages, with a proper editor, a real stdin panel and a console that tells you exactly what went wrong.

Start coding Supported languages

VB.NET · Python · Java · C · C++ · JavaScript · TypeScript · C# · PHP · Ruby · Go · Kotlin · Swift · Rust · R · SQL (SQLite)

main.py

Preparing editor…

Output appears here.

Code in any language

Pick a language and the editor opens with a ready-to-run Hello World.

PHP

Built for the way you debug

Instant execution

Code runs on real language runtimes in a sandbox and streams results back in seconds.

Real stdin

A dedicated input panel feeds your program exactly what it expects to read.

16 languages

Version strings are pulled live from the runtime service, so they are never stale.

Editor that keeps up

Monaco with bracket matching, auto-indent, four themes and Ctrl+Enter to run.

Nothing exposed

Every execution is proxied through our own server — no keys ever touch the browser.

Clear diagnostics

Compiler errors, runtime errors and exit codes are colour-coded and easy to scan.