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

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