Runs in your browser
Code Sandbox
Write and run HTML, CSS, JavaScript, and Python instantly, with a live preview and console.
LaunchThird-party embed
Jupyter Sandbox
A full Jupyter Lab notebook for Python and data work, powered by JupyterLite.
LaunchThird-party embed
SQL Sandbox
An interactive SQL environment for practicing queries and schema design, via DB Fiddle.
LaunchThese sandboxes run in your browser, so there's no server usage to report. Your device is the only limit.
New: Guided Practice
Prefer step-by-step? Practice Tracks give you exercises, checks, and XP.
HTML, CSS, JavaScript, Python, and data analysis, one guided exercise at a time.