Ruff is a high-performance Python linter and code formatter built in Rust that checks your code for style violations and common errors according to PEP 8 and other standards. Developers use it to automatically catch bugs, enforce consistent code style, and format Python files much faster than traditional tools like Pylint or Black. It consolidates multiple Python linting and formatting tools into a single, easy-to-configure utility.

2,074 open issues · last updated Jul 21, 2026