Linter GitHub Repositories (2026) · Open Source Tools

An extremely fast Python linter and code formatter, written in Rust.

Lint the rendered UI: catches overflowing text, low contrast, overlaps, broken responsive layouts, emoji icons and more in any web framework. Built for AI coding agents.

⚡A CLI tool for code structural search, lint and rewriting. Written in Rust

✂️ Find unused files, dependencies and exports in your JavaScript and TypeScript projects. Knip it before you ship it!

Fast linters runner for Go

TOML Formatter / Linter / Language Server

Static analysis for the debt AI agents leave in PHP: 34 rules, Claude Code hooks, git-diff review, a Rector and Pint fix pass, Pest expectations, CI annotations and an MCP server. Deterministic, local, no LLM.

⚓ A collection of high-performance JavaScript tools.

:pencil: A markup-aware linter for prose built with speed and extensibility in mind.

Copy/paste detector for source code. 220+ languages, Rust engine, SARIF/HTML/badge reporters, GitHub Action, MCP server for AI agents.

An Obsidian plugin that formats and styles your notes with a focus on configurability and extensibility.

The strictest and most opinionated python linter ever!

A toolchain for web projects, aimed to provide functionalities to maintain them. Biome offers formatter and linter, usable via CLI and LSP.

A complete Sigma detection engineering toolkit: parser, linter, formatter, evaluator, correlation engine, conversion framework, streaming daemon, MCP and LSP servers :crab:

It's not just a linter that annoys you!

A tool to enforce Swift style and conventions.

Prometheus rule linter/validator

An anti-bikeshedding Kotlin linter with built-in formatter

🐶 Automated code review tool integrated with any code analysis tools regardless of programming language

Harmonize is a modern linter for Swift that allows you to write architectural lint rules as unit tests. In the era of AI-generated code, it provides your team with deterministic guardrails to keep your codebase clean, maintainable, and consistent as it grows.