Python

Python Beautifier

Format Python with indentation, wrapping, and whitespace controls.

Format options

Choose indentation, line wrapping, and whitespace cleanup preferences.

Indentation style

Pick spaces or tabs; choose 2, 4, or 8-space indentation.

Line wrapping

Wrap long lines for readability; pick presets or set a custom width.

Normalize indentation

Trim inconsistent leading whitespace while keeping block structure.

Fix incorrect blocks

Dedent else/except blocks and indent after colons automatically.

Remove trailing spaces

Strip whitespace at line ends before formatting.

Limit blank lines

Collapse repeated blank lines to the chosen maximum.

max in a row

Bracket-aware wrapping

Prefer breaks at commas or brackets when wrapping long lines.

Bracket continuation indent

Indent wrapped lines further when inside parentheses or brackets.

Normalize operator spacing

Insert consistent spaces around math/comparison operators.

Python code input

Paste or type Python to reformat indentation, spacing, and line wraps.

Supports docstrings, inline comments, and multi-line strings.

Formatted output

Review and copy the beautified Python.

Use Select all or Copy to move the result into your editor.

What

Python Beautifier definition

A Python formatter reorganizes code with consistent indentation and spacing.

Cases

Use Cases

Beautify scripts before sharing

Normalize style across snippets

Read minified or messy code faster

How To

How to Format Python Code

A step-by-step guide to cleaning up indentation, wrapping, and whitespace in Python.

Paste code

Paste the Python code you want to format into the input area.

Choose options

Pick indentation and wrapping options as needed.

Format and copy

Run formatting and copy the cleaned result.

Knowledge

Understanding Python Code Style

What is PEP 8?

PEP 8 is Python's official style guide. It recommends 4-space indentation, 79-character line limits, and specific naming conventions. Following PEP 8 makes Python code more readable and consistent across projects.

Python Indentation

Python uses indentation to define code blocks (unlike braces in other languages). Mixing tabs and spaces causes errors. PEP 8 recommends 4 spaces per indentation level. Most editors can be configured to enforce this.

Naming Conventions

Python uses: snake_case for functions and variables, PascalCase for classes, UPPERCASE for constants. Private attributes start with underscore (_private). Name-mangled attributes use double underscore (__private).

Python Formatting Tools

Popular tools include: Black (opinionated, deterministic), autopep8 (PEP 8 compliance), YAPF (configurable style), and isort (import sorting). Many projects use Black for its 'one way' philosophy.

Docstrings

Python uses triple-quoted strings for documentation. Docstrings describe modules, classes, and functions. Popular formats include Google style, NumPy style, and Sphinx/reStructuredText. Tools like Sphinx can generate documentation from docstrings.

FAQ

Python beautifier FAQ

What indentation widths are supported?

Use tabs or 2/4/8-space indentation. The tool will reflow blocks and dedent else/except when enabled.

Will docstrings or multiline strings be changed?

Triple-quoted strings are preserved. Formatting resumes after the closing delimiter.

How does line wrapping work?

Long lines wrap at commas or spaces up to the chosen width, adding continuation indents for readability.

Can I keep extra blank lines?

Enable 'Limit blank lines' and set how many consecutive empty lines are allowed.

What's the background of Python?

Python was created by Guido van Rossum in 1991 and remains one of the most popular languages for its readability and batteries-included standard library.

How popular is Python today?

Python ranks near the top of TIOBE and Stack Overflow indexes, driven by data science, backend, and automation ecosystems.

Where is Python formatting most useful?

Code reviews, CI formatting steps, teaching newcomers, and preparing scripts or notebooks for publication all benefit from consistent formatting.

Any maintenance tips for Python code style?

Follow PEP 8 defaults, keep indentation consistent, and run formatters in CI so editors and pipelines match.