Analytics for CSS, part of Project Wallace.

Linter for SCSS/CSS files.

Potentially interesting stats on stylesheets.

CSS Specificity Graph Generator.

Stylesheet analysis tool.

A tool for transforming styles with JS plugins. These plugins can lint your CSS, support variables and mixins, transpile future CSS syntax, inline images, and more.

A Node-only Sass linter for both sass and scss syntax.

Linter for SCSS files.

CSS Specificity Graph Generator.

squirrelscan is a website QA tool built for coding agents such as Claude Code and Cursor. Its squirrel CLI crawls a live site and runs 260+ audit rules across SEO, performance, security, accessibility, structured data and agent experience, then returns exact source-mapped fixes. Runs from the terminal, CI, the cloud, or over MCP.

A coding style formatter for CSS. Supports own configurations to make style sheets beautiful and consistent.

Does basic syntax checking and finds problematic patterns or signs of inefficiency.

Mega-Linter can handle any type of project thanks to its 70+ embedded Linters, its advanced reporting, runnable on any CI system or locally, with assisted installation and configuration, able to apply formatting and fixes

A toolchain for web projects, aimed to provide functionalities to maintain them. Biome formats and lints code in a fraction of a second. It is the successor to Rome. It is designed to eventually replace Biome is designed to eventually replace Babel, ESLint, webpack, Prettier, Jest, and others.

Code Analysis to ship Better Code, Faster.

Pluggable and configurable code transformer with built-in eslint, babel plugins support for js, jsx typescript, flow, markdown, yaml and json.

Check your code quality for js, jsx, vue, css, less, scss, sass and styl files.

SonarQube empowers development teams with a code quality and security solution that deeply integrates into your enterprise environment; enabling you to deploy clean code consistently and reliably. SonarQube provides a free and open source Community Build.

Comments on style violations in GitHub pull requests. Supports Coffeescript, Go, HAML, JavaScript, Ruby, SCSS and Swift.

Copy/paste detector for programming source code. Finds duplicated blocks in 200+ file formats — JavaScript, TypeScript, Python, Java, C#, C/C++, Go, Rust, PHP, Ruby and more — using token-based detection. Supports configurable thresholds and ignore patterns, git blame integration, and reporters for console, HTML, JSON, Markdown, SARIF and badges. Runs via CLI, in CI pipelines, or as a library; bundled by MegaLinter and Codacy.

Tencent Cloud Code Analysis (TCA for short, code-named CodeDog inside the company early) is a comprehensive platform for code analysis and issue tracking. TCA consist of three components, server, web and client. It integrates of a number of self-developed tools, and also supports dynamic integration of code analysis tools in various programming languages.

Beautify HTML, CSS, JavaScript, PHP, Python, Ruby, Java, C, C++, C#, Objective-C, CoffeeScript, TypeScript, Coldfusion, SQL, and more in Atom editor.

A language-agnostic linter that keeps code, documentation, and configuration in sync and enforces strict formatting and validation rules.

Language independent framework for creating code analysis - supports over 60 languages by default.

Rust-native static analysis for JavaScript and TypeScript. Maps a repository as one dependency graph to find unused code and structural problems across file boundaries. Runs from the CLI or GitHub Actions, with VS Code, LSP, MCP, and Node API integrations.

Helps you catch problems in your HTML/CSS/SVG

SonarQube Cloud enables your team to deliver clean code consistently and efficiently with a code review tool that easily integrates into the cloud DevOps platforms and extend your CI/CD workflow. SonarQube Cloud provides a free plan.

SonarQube for IDE (formerly SonarLint) is a free IDE extension available for IntelliJ, VS Code, Visual Studio, and Eclipse, to find and fix coding issues in real-time, flagging issues as you code, just like a spell-checker. More than a linter, it also delivers rich contextual guidance to help developers understand why there is an issue, assess the risk, and educate them on how to fix it.

Universal code beautifier with a GitHub app. Supports HTML, CSS, JavaScript, TypeScript, JSX, Vue, C++, Go, Objective-C, Java, Python, PHP, GraphQL, Markdown, and more.

Facebook's tools for code analysis, visualizations, or style-preserving source transformation for many languages.

Automated Code Analysis for repos on GitHub or BitBucket.

A linter and formatter to help you to improve copywriting, correct spaces, words, punctuations between CJK (Chinese, Japanese, Korean).

Automated code analysis tool to deal with technical depth. Integrates with Bitbucket and Gitlab. (free for Open Source Projects)

Code visualization tool that provides code analysis, standards testing, metrics, graphing, dependency analysis and more for Ada, VHDL, and others.