Ruff

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About

Ruff is ranked #12 of 34 in code formatting tools on Inferse. It runs on Linux, macOS, Self-hosted, Web, Windows. There is a free plan.

Compared on code formatting tools

Free plan: Yesdocs.astral.sh

Facts

Purpose: Ruff is a Python linter and code formatter written in Rust.docs.astral.sh · 29 Sept 2026
Speed: The maker describes Ruff as 10–100x faster than existing linters and formatters such as Flake8 and Black.docs.astral.sh · 29 Sept 2026
Linting rules: Ruff includes over 900 built-in rules, including native implementations of popular Flake8 plugins.docs.astral.sh · 29 Sept 2026
Automatic fixes: Ruff can automatically fix lint violations, including removing unused imports.docs.astral.sh · 29 Sept 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 · 29 Sept 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 · 29 Sept 2026
Editor integrations: The setup guide documents integrations including VS Code, Sublime Text, PyCharm, and Zed.docs.astral.sh · 29 Sept 2026
CI integrations: Ruff documents integrations for GitHub Actions and GitLab CI/CD, and hooks for pre-commit.docs.astral.sh · 29 Sept 2026
Installation: Ruff can be installed using uv, pip, pipx, standalone installers, and package managers including Homebrew and Conda.docs.astral.sh · 29 Sept 2026
Docker: The maker publishes Ruff as a Docker image tagged by release and with a latest tag.docs.astral.sh · 29 Sept 2026
Configuration: Ruff supports configuration through pyproject.toml, ruff.toml, or .ruff.toml.docs.astral.sh · 29 Sept 2026
Notable limit: Ruff does not support custom or third-party lint rules.docs.astral.sh · 29 Sept 2026
Security: Ruff’s rules include a Bandit-derived group for detecting common security issues, including possible vulnerabilities in Python code.docs.astral.sh · 29 Sept 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 · 29 Sept 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 · 29 Sept 2026