The Best CSS Static Analysis Tools (Linters/Formatters)

We rank 30 CSS linters, code analyzers, formatters, and more. Find and compare tools like Mega-Linter, SonarQube, Codacy, and more. Please rate and review tools that you've used. This helps others find the best tools for their projects.

11 CSS Tools

Project Wallace CSS Analyzer

Analytics for CSS, part of Project Wallace.

  • MaintainedMaintained
  • MaintainedMulti-Language
  • Maintainedcli
  • Maintainedlinter
  • 100% upvoted

Stylelint

Linter for SCSS/CSS files.

  • MaintainedMaintained
  • MaintainedMulti-Language
  • Maintainedcli
  • Maintainedlinter
  • 100% upvoted

CSS Stats

Potentially interesting stats on stylesheets.

  • MaintainedMaintained
  • MaintainedMulti-Language
  • Maintainedcli
  • Maintainedlinter
  • 0% upvoted

CSScomb

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

  • MaintainedMaintained
  • MaintainedMulti-Language
  • Maintainedcli
  • Maintainedformatter
  • 0% upvoted

CSSLint

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

  • MaintainedMaintained
  • MaintainedMulti-Language
  • Maintainedcli
  • Maintainedlinter
  • 0% upvoted

GraphMyCSS.com

CSS Specificity Graph Generator.

  • MaintainedMaintained
  • MaintainedMulti-Language
  • Maintainedcli
  • Maintainedlinter
  • 0% upvoted

Parker

Stylesheet analysis tool.

  • DeprecatedDeprecated
  • DeprecatedMulti-Language
  • Deprecatedcli
  • Deprecatedlinter
  • 0% upvoted

PostCSS

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.

  • MaintainedMaintained
  • MaintainedMulti-Language
  • Maintainedcli
  • Maintainedlinter
  • 0% upvoted

sass-lint

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

  • DeprecatedDeprecated
  • DeprecatedMulti-Language
  • Deprecatedcli
  • Deprecatedlinter
  • 0% upvoted

scsslint

Linter for SCSS files.

  • MaintainedMaintained
  • MaintainedMulti-Language
  • Maintainedcli
  • Maintainedlinter
  • 0% upvoted

Specificity Graph

CSS Specificity Graph Generator.

  • MaintainedMaintained
  • MaintainedMulti-Language
  • Maintainedcli
  • Maintainedlinter
  • 0% upvoted

19 Multi-Language Tools

Mega-Linter

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

  • MaintainedMaintained
  • MaintainedMulti-Language
  • Maintainedcli
  • Maintainedlinter
  • 68% upvoted

SonarQube

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 Edition.

  • MaintainedMaintained
  • MaintainedMulti-Language
  • Maintainedservice
  • Maintainedlinter
  • 70% upvoted

Codacy

Code Analysis to ship Better Code, Faster.

  • MaintainedMaintained
  • MaintainedMulti-Language
  • Maintainedservice
  • Maintainedlinter
  • 72% upvoted

Atom-Beautify

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

  • DeprecatedDeprecated
  • DeprecatedMulti-Language
  • Deprecatedide-plugin
  • Deprecatedlinter
  • 64% upvoted

TencentCodeAnalysis

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.

  • MaintainedMaintained
  • MaintainedMulti-Language
  • MaintainedcliMaintainedservice
  • Maintainedlinter
  • 100% upvoted

Unibeautify

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.

  • MaintainedMaintained
  • MaintainedMulti-Language
  • MaintainedcliMaintainedservice
  • Maintainedformatter
  • 67% upvoted

biome

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.

  • MaintainedMaintained
  • MaintainedMulti-Language
  • Maintainedcli
  • Maintainedlinter
  • 100% upvoted

Putout

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

  • MaintainedMaintained
  • MaintainedMulti-Language
  • Maintainedcli
  • Maintainedlinter
  • 100% upvoted

cqc

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

  • DeprecatedDeprecated
  • DeprecatedMulti-Language
  • Deprecatedcli
  • Deprecatedlinter
  • 100% upvoted

Hound CI

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

  • MaintainedMaintained
  • MaintainedMulti-Language
  • Maintainedcli
  • Maintainedlinter
  • 54% upvoted

pfff

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

  • DeprecatedDeprecated
  • DeprecatedMulti-Language
  • Deprecatedcli
  • Deprecatedformatter
  • 60% upvoted

SonarCloud

SonarCloud 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. SonarCloud is free for open source projects.

  • MaintainedMaintained
  • MaintainedMulti-Language
  • Maintainedservice
  • Maintainedlinter
  • 56% upvoted

autocorrect

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

  • MaintainedMaintained
  • MaintainedMulti-Language
  • Maintainedcli
  • MaintainedlinterMaintainedformatter
  • 0% upvoted

coala

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

  • DeprecatedDeprecated
  • DeprecatedMulti-Language
  • Deprecatedcli
  • Deprecatedlinter
  • 0% upvoted

CodeFactor

Automated Code Analysis for repos on GitHub or BitBucket.

  • MaintainedMaintained
  • MaintainedMulti-Language
  • Maintainedservice
  • Maintainedlinter
  • 50% upvoted

CodeFlow

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

  • MaintainedMaintained
  • MaintainedMulti-Language
  • Maintainedservice
  • Maintainedlinter
  • 50% upvoted

Nu Html Checker

Helps you catch problems in your HTML/CSS/SVG

  • MaintainedMaintained
  • MaintainedMulti-Language
  • Maintainedcli
  • Maintainedlinter
  • 0% upvoted

SonarLint

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.

  • MaintainedMaintained
  • MaintainedMulti-Language
  • Maintainedcli
  • Maintainedlinter
  • 0% upvoted

Understand

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

  • MaintainedMaintained
  • MaintainedMulti-Language
  • Maintainedcli
  • Maintainedlinter
  • 45% upvoted

Frequently Asked Questions

What are CSS tools?

CSS (Cascading Style Sheets) is a style sheet language used for describing the presentation of a document written in a markup language. A style sheet is a collection of rules that tells a web browser how to display an HTML document.

What are the best CSS static analysis tools and linters?

The most popular CSS tools ranked by user votes are: Mega-Linter, SonarQube, Codacy, Atom-Beautify, TencentCodeAnalysis.

Which CSS services are free for open source projects?

Commercial services with a free plan for open source include Mega-Linter, SonarQube, Codacy, Atom-Beautify, TencentCodeAnalysis, Unibeautify, biome, Project Wallace CSS Analyzer, Putout, cqc, Hound CI, pfff, SonarCloud, Stylelint, autocorrect, coala, CodeFactor, CSS Stats, CSScomb, CSSLint, GraphMyCSS.com, Nu Html Checker, Parker, PostCSS, sass-lint, scsslint, Specificity Graph, SonarLint.

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