Linting the CPython codebase, from scratch.
Ruff
ssAutoflake
ssFlake8
ssPyflakes
sspycodestyle
ssPylint
ss
An ambitious tool for ambitious projects
Ruff is a high-performance Python linter that lets you ship faster. Replace dozens of dependencies with a single tool — that runs in a fraction of the time.
"Shockingly fast"
Ruff is 10-100x faster than existing tools, enabling sub-second feedback loops on even the largest codebases.
All-in-one
Replace dozens of tools with a single, unified interface. Ruff supports over 500 rules and maintains drop-in compatibility with Flake8, isort, and more.
Automated
Automatically upgrade to newer Python syntax, organize imports, remove unused variables, and more with Ruff’s powerful autofix model.
Tried and tested.Powering impactful projects across open source.
Ruff is so fast that sometimes I add an intentional bug in the code just to confirm it's actually running.
Sebastián RamírezCreator of FastAPI
Why is Ruff a gamechanger? Primarily because it’s nearly 1000x faster. Literally. Not a typo.
Nick SchrockFounder of Elementl, co-creator of GraphQL
Just switched my first project to Ruff. Only one downside so far: it's so fast I couldn't believe it was working until I intentionally introduced some errors.
Timothy CrosleySoftware Engineer at Stripe, Creator of isort
Ruff is so fast that sometimes I add an intentional bug in the code just to confirm it's actually running.
Sebastián RamírezCreator of FastAPI
Why is Ruff a gamechanger? Primarily because it’s nearly 1000x faster. Literally. Not a typo.
Nick SchrockFounder of Elementl, co-creator of GraphQL
Just switched my first project to Ruff. Only one downside so far: it's so fast I couldn't believe it was working until I intentionally introduced some errors.
Timothy CrosleySoftware Engineer at Stripe, Creator of isort
Ruff is so fast that sometimes I add an intentional bug in the code just to confirm it's actually running.
Sebastián RamírezCreator of FastAPI
Why is Ruff a gamechanger? Primarily because it’s nearly 1000x faster. Literally. Not a typo.
Nick SchrockFounder of Elementl, co-creator of GraphQL
Just switched my first project to Ruff. Only one downside so far: it's so fast I couldn't believe it was working until I intentionally introduced some errors.
Timothy CrosleySoftware Engineer at Stripe, Creator of isort
Ruff is so fast that sometimes I add an intentional bug in the code just to confirm it's actually running.
Sebastián RamírezCreator of FastAPI
Why is Ruff a gamechanger? Primarily because it’s nearly 1000x faster. Literally. Not a typo.
Nick SchrockFounder of Elementl, co-creator of GraphQL
Just switched my first project to Ruff. Only one downside so far: it's so fast I couldn't believe it was working until I intentionally introduced some errors.
Timothy CrosleySoftware Engineer at Stripe, Creator of isort
