Python online compiler β full CPython in the browser, no install
Most 'online Python compiler' tools either are not CPython, time out after 10 seconds, or paywall the imports you actually need.
When you search for 'python online compiler' you usually want one of three things: (a) test a snippet you found on Stack Overflow without setting up a venv, (b) try one of the data-science libraries (pandas, numpy, scipy) without installing them, or (c) share working code with a teammate by URL. Almost every free option fails at least one of those: some run a Python subset (no full stdlib), some don't ship pandas, some make sharing URLs that expire after a day.
Our /playground is real CPython compiled to WebAssembly via Pyodide. Pandas, numpy, scipy, matplotlib are pre-installed; micropip handles anything else. Code lives in the URL, so the link you send is your exact snippet β no expiry, no account. The same engine powers half our lessons; the same patterns work in both surfaces.