⚡️ 10-100x faster than existing linters (like Flake8) and formatters (like Black)
🐍 Installable via
pip
🛠️
pyproject.toml
support
🤝 Python 3.13 compatibility
⚖️ Drop-in parity with
Flake8
, isort, and
Black
📦 Built-in caching, to avoid re-analyzing unchanged files
🔧 Fix support, for automatic error correction (e.g., automatically remove unused imports)
📏 Over
800 built-in rules
, with native re-implementations
of popular Flake8 plugins, like flake8-bugbear
⌨️ First-party
editor integrations
for
VS Code
and
more
🌎 Monorepo-friendly, with
hierarchical and cascading configuration
Ruff aims to be orders of magnitude faster than alternative tools while integrating more
functionality behind a single, common interface.
Ruff can be used to replace
Flake8
(plus dozens of plugins),
Black
,
isort
,
pydocstyle
,
pyupgrade
,
autoflake
, and more, all while executing tens or hundreds of
times faster than any individual tool.
Ruff is extremely actively developed and used in major open-source projects like:
Apache Airflow
Apache Superset
FastAPI
Hugging Face
Pandas
SciPy
...and
many more
.
Ruff is backed by
Astral
. Read the
launch post
,
or the original
project announcement
.
Testimonials
Sebastián Ramírez
, creator
of
FastAPI
:
Ruff is so fast that sometimes I add an intentional bug in the code just to confirm it's actually
running and checking the code.
Nick Schrock
, founder of
Elementl
,
co-creator of
GraphQL
:
Why is Ruff a gamechanger? Primarily because it is nearly 1000x faster. Literally. Not a typo. On
our largest module (dagster itself, 250k LOC) pylint takes about 2.5 minutes, parallelized across 4
cores on my M1. Running ruff against our
entire
codebase takes .4 seconds.
Bryan Van de Ven
, co-creator
of
Bokeh
, original author
of
Conda
:
Ruff is ~150-200x faster than flake8 on my machine, scanning the whole repo takes ~0.2s instead of
~20s. This is an enormous quality of life improvement for local dev. It's fast enough that I added
it as an actual commit hook, which is terrific.
Timothy Crosley
,
creator of
isort
:
Just switched my first project to Ruff. Only one downside so far: it's so fast I couldn't believe
it was working till I intentionally introduced some errors.
Tim Abbott
, lead
developer of
Zulip
:
This is just ridiculously fast...
ruff
is amazing.
