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Python Formatter
Format and beautify Python code with proper PEP 8-style indentation. Cleans up spacing around operators, normalises indentation, and structures your code for readability.
📥 Input
📤 Output
Ready — paste code and click Format · Ctrl+Enter to format
Lines: —
Size: —
Load example:
▶ Function
▶ Class
What is PEP 8?
PEP 8 is the official Python style guide published by the Python Software Foundation. It defines conventions for indentation (4 spaces), line length (79 characters), blank lines between functions and classes, spacing around operators, and naming conventions. Following PEP 8 makes Python code more readable and consistent across teams and projects.
Frequently Asked Questions
Python uses mandatory indentation to define code blocks, removing the need for curly braces or begin/end keywords. This was a deliberate design choice by Guido van Rossum to enforce readable code structure. Inconsistent indentation is a syntax error in Python — unlike most other languages where it's just a style issue.
PEP 8 mandates 4 spaces per indentation level for Python. While 2 spaces are common in other languages (like Ruby), Python's official style guide and most Python projects use 4 spaces. Google's Python style guide also uses 4 spaces. Tabs are allowed by the interpreter but mixing tabs and spaces is a syntax error in Python 3.
No. This formatter only adjusts whitespace and indentation — it never changes the logic, variable names, or structure of your code. It's safe to format and copy back to your project.
Done!