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Python 3.12 (Pyodide & Host Runner)

Online Python Compiler

Write, run and test Python 3 code in your browser with interactive standard input. Write code with auto-formatting, test with standard input (stdin), and inspect terminal output in real-time.

✓ Standard library math, json, random, re✓ Interactive stdin support✓ Zero installation required✓ Instant execution in secure sandbox
main.py
Python 3.12 (Pyodide & Host Runner)
13px
Standard Input (stdin)
Passed to scanf, input(), cin, etc.
UTF-8Python 32 SpacesWrap: Off
Ctrl+Enter to Run
Ln 1, Col 128 lines683 chars
Output & ConsoleIdle

Ready to Compile & Run

Click the blue ▶ Run button in the header bar or press Ctrl + Enter to compile and execute your Online Python Compiler.

How to Run Python 3 Code Online

Execute modern Python 3 scripts directly in your browser. Handles standard output, errors, arithmetic, algorithms, and interactive text input without server delays.

  1. Write or edit your Python code in the left code editor.
  2. If your program expects user input via input() or sys.stdin, enter it into the Stdin panel.
  3. Click the blue "▶ Run" button or press Ctrl + Enter.
  4. View stdout, results, and diagnostic execution times in the output console.
Stdin Tip: Use sys.stdin.read() or input() to capture data supplied in the Input tab before running.

Common Errors & Troubleshooting

Encountering compilation or runtime diagnostics? Check these common scenarios:

IndentationError: unexpected indentEnsure consistent 2 or 4-space indentation across all code blocks.
NameError: name is not definedVerify variable spelling and ensure modules are imported prior to use.

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Frequently Asked Questions (Python 3)

Yes. It is 100% free with unlimited runs, zero signup requirements, and no paywalls.