On the recordRead 29 Sep 202615 facts
Ruff
Plans and prices
Ruff
Free
Open-source Python linter and formatter · permissively licensed
Read 29 Sep 2026 · astral.sh
On the record
- Automatic fixes
- Ruff can automatically fix lint violations, including removing unused imports.docs.astral.sh · read 29 Sep 2026
- CI integrations
- Ruff documents integrations for GitHub Actions and GitLab CI/CD, and hooks for pre-commit.docs.astral.sh · read 29 Sep 2026
- Configuration
- Ruff supports configuration through pyproject.toml, ruff.toml, or .ruff.toml.docs.astral.sh · read 29 Sep 2026
- Docker
- The maker publishes Ruff as a Docker image tagged by release and with a latest tag.docs.astral.sh · read 29 Sep 2026
- Editor integrations
- The setup guide documents integrations including VS Code, Sublime Text, PyCharm, and Zed.docs.astral.sh · read 29 Sep 2026
- Editor support
- The built-in Ruff Language Server provides diagnostics, code actions to fix them, and formatting; the docs recommend pairing it with another Python language server for navigation and autocompletion.docs.astral.sh · read 29 Sep 2026
- Formatter
- Ruff’s formatter is designed as a drop-in replacement for Black, though the FAQ notes there may be differences at the margins.docs.astral.sh · read 29 Sep 2026
- Installation
- Ruff can be installed using uv, pip, pipx, standalone installers, and package managers including Homebrew and Conda.docs.astral.sh · read 29 Sep 2026
- Linting rules
- Ruff includes over 900 built-in rules, including native implementations of popular Flake8 plugins.docs.astral.sh · read 29 Sep 2026
- Maker
- Astral says it builds high-performance developer tools for the Python ecosystem and that its tools are open source and permissively licensed.astral.sh · read 29 Sep 2026
- Notable limit
- Ruff does not support custom or third-party lint rules.docs.astral.sh · read 29 Sep 2026
- Purpose
- Ruff is a Python linter and code formatter written in Rust.docs.astral.sh · read 29 Sep 2026
- Security
- Ruff’s rules include a Bandit-derived group for detecting common security issues, including possible vulnerabilities in Python code.docs.astral.sh · read 29 Sep 2026
- Speed
- The maker describes Ruff as 10–100x faster than existing linters and formatters such as Flake8 and Black.docs.astral.sh · read 29 Sep 2026
- Support
- The editor setup documentation says setup instructions are provided on a best-effort basis and directs users to open an issue for assistance.docs.astral.sh · read 29 Sep 2026
