Privacy
Privacy policy
Your code runs on your device and is not uploaded.
Your code and progress
Programs run in your browser. Your editor contents and exercise progress are stored in your browser's local storage so they survive a refresh; clear site data to remove them. Share links keep code after the # in the URL, which browsers do not send to servers.
Third parties
Python (Pyodide) and fonts are downloaded from jsDelivr and Google Fonts. Those services see a normal file request, never your code. We may use Google Analytics to count visits; it never receives your code.