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pycodestyle vs Ruff: catalog facts
pycodestyle	Ruff
Free Free and open source under the Expat license.	Free The open-source application is available without a license fee.
Command line	Windows, macOS, Linux
Checks code against PEP 8 conventions Supports plugins and configurable checks	Linting, formatting and fix support in one tool
Checks style conventions rather than program behavior Requires Python	It does not replace running your program or its tests.
Downloadable app	Downloadable app
Open source	Open source
License: MIT	License: MIT
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 8, 2026	Official website Full listing and sources Checked September 22, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.