Top LINT GitHub Repositories & Tools (2026)

Built from the ground up for speed. Flectar Mail delivers native performance, instant startup, and as little as 20 MB of RAM.

Codebase intelligence for TypeScript and JavaScript. Free static analysis of code and styles: unused code, duplication, circular deps, complexity hotspots, architecture boundaries, design-system drift. Optional paid runtime layer (Fallow Runtime): hot-path review and cold-path deletion evidence from real production traffic.

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

Static analysis for the debt AI agents leave in PHP: 25 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 tool to enforce Swift style and conventions.

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

Static code analysis for Kotlin

Find and fix problems in your JavaScript code.

🔥 Fast, strict, configurable, extensible, and beautiful linter for Go

Code smell detector for Ruby

ESLint rules for Node Security

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

:sparkles: Monorepo for all the tooling related to using ESLint with Angular

Small Clojure interpreter, linter and formatter.

Quickstart-friendly TypeScript template with comprehensive, configurable, opinionated tooling. 🎁

🐘 Linter for Postgres migrations & SQL

Code style checking for RSpec files.

undercover warns about methods, classes and blocks that were changed without tests, to help you easily find untested code and reduce the number of bugs. It does so by analysing data from git diffs, code structure and SimpleCov coverage reports

🐊 Pluggable and configurable JavaScript Linter, code transformer and formatter with superpowers 💪: built-in support of js, jsx, ts, markdown, yaml, toml, json and ignore. Write declarative codemods in a simplest possible way 😏

Clendar - Minimal Calendar app. Written in SwiftUI.