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Numio

Online Python Compiler — Numio

Run Python 3 code online in your browser. Standard library, input() support and instant output. Free, no sign-up, nothing uploaded.

Runs in your browser · No sign-up

Code (Python)

Ctrl/⌘ + Enter to run

input() and io.read() read these lines in order.

Output

Code runs locally in your browser; it is not uploaded.

How to use

  1. Write or paste Python 3 code in the editor.
  2. Optional: type lines for input() in the input box.
  3. Press Run (or Ctrl/⌘ + Enter) to see the output.

Example

# Python 3 example
def greet(name):
    return f"Hello, {name}!"

for name in ["Ada", "Alan"]:
    print(greet(name))

print("Sum of 1 to 100:", sum(range(1, 101)))

Details and limitations

Python runs via Pyodide, CPython compiled to WebAssembly. The runtime (about 10 MB) downloads on the first run and is cached afterwards.

Each run starts fresh and stops after 10 seconds. Installing extra packages with pip is not supported.

FAQ

Which Python version is used?

Python 3, via Pyodide. The standard library, including math, json, re, datetime and collections, is available.

How do I use input()?

Type one value per line in the input box. Each call to input() reads the next line.

Is my code uploaded to a server?

No. Your code runs entirely in your browser. Only the Python runtime is downloaded from a public CDN (jsDelivr) on first use.

Format references

Tool page updated: