How does Python run in the browser?

The compiler uses Pyodide, a Python distribution compiled to WebAssembly. It runs a full Python 3.11 interpreter directly in your browser with no server needed.

Does it support Python packages?

Yes. The standard library is fully available, and many popular packages like numpy and pandas can be loaded on demand via micropip.

Is my code saved anywhere?

No. Your code stays in your browser session only. Nothing is uploaded or stored on any server. When you close the tab, the code is gone unless you copy it.

Can I use this for learning Python?

Absolutely. The instant feedback loop, syntax highlighting, and error messages make it ideal for beginners. You can experiment freely without worrying about breaking anything on your computer.

What keyboard shortcuts are available?

Press Ctrl+Enter (or Cmd+Enter on Mac) to run code, Ctrl+S to trigger save actions, and use standard Monaco editor shortcuts for find/replace, multi-cursor editing, and code folding.

Does it support input() for user input?

Yes. When your code calls input(), an input terminal appears where you can type values. The execution pauses until you provide the input, just like a real terminal.

How fast is the execution compared to desktop Python?

WebAssembly execution is surprisingly fast — typically within 2-5x of native CPython speed. For most scripts, the difference is imperceptible.

Can I use this on mobile devices?

Yes. The compiler works on mobile browsers including Chrome and Safari on iOS/Android. The Monaco editor adapts to smaller screens, though a keyboard is recommended for coding.

Python Compiler

Write and run Python code directly in your browser — powered by WebAssembly. Full Python 3.11 with stdlib, Monaco editor, and instant execution. Free, fast, and runs 100% in your browser.

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ZamPyOnline Python Compiler

main.py

# Welcome to ZamPy - Python Online Compiler # Write your Python code here and press Run (or Ctrl+Enter) # Example 1: Simple greeting with user input name = input("What is your name? ") print(f"Hello, {name}! Welcome to ZamPy.") # Example 2: Interactive calculator print("\n--- Simple Calculator ---") num1 = input("Enter first number: ") num2 = input("Enter second number: ") try: result = float(num1) + float(num2) print(f"{num1} + {num2} = {result}") except ValueError: print("Please enter valid numbers!") # Example 3: Number guessing hint print("\n--- Quick Math ---") age = input("Enter your birth year: ") try: current_year = 2024 age_calc = current_year - int(age) print(f"You are approximately {age_calc} years old!") except ValueError: print("Please enter a valid year!") print(" Thanks for using ZamPy!")

Output

Output will appear here

Press Run or Ctrl+Enter to execute

Loading Python (0%)

Pyodide v0.26.4

Ln 1, Col 1848 BPythonUTF-8

About Python Compiler

The ZamDev Online Python Compiler is a full-featured Python 3.11 development environment that runs entirely in your web browser. Powered by Pyodide and WebAssembly, it executes real Python code without any server — everything happens on your device. Whether you are learning Python, prototyping algorithms, or testing quick scripts, this tool provides a Monaco-based code editor with syntax highlighting, auto-completion, and instant output. No installation, no account, and no setup required.

How It Works

1Open the Python Compiler and start writing code in the Monaco editor.
2Click Run or press Ctrl+Enter to execute your script instantly.
3View output, errors, and print statements in the built-in terminal panel.
4Use the file tabs to manage multiple scripts in the same session.
5Import standard library modules and popular packages like numpy via micropip.

Key Features

Lightning Fast

Processes instantly with zero server delays

100% Private

Your data never leaves your device

No Sign-up Required

Use this tool instantly — completely free

Works Everywhere

Compatible with all modern browsers and devices

Common Use Cases

Learning Python fundamentals with instant feedback

Prototyping algorithms and data structures quickly

Testing code snippets before adding them to a project

Running Python on shared or restricted computers without installing anything

Teaching Python in classrooms or workshops without environment setup

Quickly debugging small scripts or regular expressions

Frequently Asked Questions

python compilerrun python onlinepython editoronline python IDEpython in browserpython playgroundpython code runnerpython REPL onlinelearn python onlinepython sandboxbrowser pythonpython webassembly

About Python Compiler

How It Works

1Open the Python Compiler and start writing code in the Monaco editor.

2Click Run or press Ctrl+Enter to execute your script instantly.

3View output, errors, and print statements in the built-in terminal panel.

4Use the file tabs to manage multiple scripts in the same session.

5Import standard library modules and popular packages like numpy via micropip.

Common Use Cases

Learning Python fundamentals with instant feedback

Prototyping algorithms and data structures quickly

Testing code snippets before adding them to a project

Running Python on shared or restricted computers without installing anything

Teaching Python in classrooms or workshops without environment setup

Quickly debugging small scripts or regular expressions

Python Compiler

About Python Compiler

How It Works

Key Features

Common Use Cases

Frequently Asked Questions

Need something custom?
Let's build it together.

Python Compiler

About Python Compiler

How It Works

Key Features

Common Use Cases

Frequently Asked Questions

Need something custom?
Let's build it together.

Command Palette

Python Compiler

About Python Compiler

How It Works

Key Features

Common Use Cases

Frequently Asked Questions

Need something custom?Let's build it together.

Command Palette

Python Compiler

About Python Compiler

How It Works

Key Features

Common Use Cases

Frequently Asked Questions

Need something custom?Let's build it together.

Need something custom?
Let's build it together.

Need something custom?
Let's build it together.