THE DEVELOPER PLAYGROUND ✳

Build something brilliant.

Edit, run locally supported languages, visualize results, and debug code — no backend required.

14Languages

11Browser runtimes

2AI modes

Playground/PythonPyodide • WebAssembly

Ready when you are.

Your output will appear here. Press Run code to begin.

Use plot([4, 8, 15, 16, 23]) in JavaScript or Python, or run a two-column SQL query to see a chart.

STDIN one input per linePYTHON PACKAGES micropip · comma separated

✳ Code without the setup.WASM powered · Free to explore · Built for curious minds

LANGUAGE EXPLORER

One playground. More possibilities.

Explore a fast, local-first programming environment for popular languages. Run examples in browser sandboxes, test inputs, query data and visualize results without installing a compiler.

HOW IT WORKS

From idea to output, instantly.

Compilerium uses purpose-built browser runtimes rather than pretending all languages have the same execution model. Python uses Pyodide and micropip for compatible packages; C and C++ use a local WASI compilation sandbox; SQL runs on SQLite WebAssembly; web projects render in an isolated iframe. Rust, Go and Java remain editor-only on this entirely static site.

01Pick a language

Start from an editable example or bring your own code.

02Run in-browser

Most languages execute locally. No upload or account needed for compilation.

03Understand more

Use the optional cloud or WebGPU AI assistant to debug and learn.