autopep8

autopep8 is ranked #1 of 34 in code formatting tools on The Geeks Club. It runs on API, Linux, macOS, Windows.

Compared on code formatting tools

Free plan: Yes
Supported languages: Python
Supported platforms: OS independent
Editor integration: No
Ignore files: Yes
Changed-lines formatting: Yes
Library API: Yes
License model: open_source

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autopep8

Purpose: autopep8 automatically formats Python code to conform to the PEP 8 style guide.
How it works: It uses pycodestyle to identify formatting issues and can fix most issues that pycodestyle reports.
Installation: The project documents installation with `pip install --upgrade autopep8`.
Requirements: autopep8 requires pycodestyle.
Fixes: Listed fixes include indentation, whitespace, blank lines, imports, line length, and selected code style issues.
Change controls: The tool supports selecting or ignoring fix codes, setting a maximum line length, and enabling more aggressive changes.
Configuration: It supports configuration through pyproject.toml, setup.cfg, tox.ini, .pep8, and .flake8 files.
Integration: autopep8 can be used as a pre-commit hook.
Programming interface: The project documents using autopep8 as a Python module through its `fix_code()` function.
Limit: By default, autopep8 makes whitespace changes only; some fixes that can alter code meaning require the `--aggressive` option.
Compatibility: PyPI lists Python >=3.9 as a requirement and classifies the operating system as OS Independent.
Audience: PyPI classifies the intended audience as developers and the environment as console.
License: PyPI identifies the project license as MIT License.
Support and maintenance: The project links to GitHub Issues and lists two PyPI maintainers.

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Where it ranks on The Geeks Club

Best Code Formatting Tools in 2026#1 of 34

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Sources

github.com/hhatto/autopep8· checked 3 Oct 2026
pypi.org/project/autopep8/· checked 3 Oct 2026