30 Best Free Tools for Frontend Developers in 2025

1. webpack

   1 367 65,216 9.8 JavaScript

   A bundler for javascript and friends. Packs many modules into a few bundled assets. Code Splitting allows for loading parts of the application on demand. Through "loaders", modules can be CommonJs, AMD, ES6 modules, CSS, Images, JSON, Coffeescript, LESS, ... and your custom stuff.

   

   Website: webpack.js.org

2. Civic Auth

   www.civic.com featured

   Auth in Less Than 5 Minutes. Civic Auth comes with multiple SSO options, optional embedded wallets, and user management — all implemented with just a few lines of code. Start building today.

   

3. vercel

   2 584 13,528 9.9 TypeScript

   Develop. Preview. Ship.

   

   Website: vercel.com

4. go-unsplash

   3 864 76 1.8 Go

   Go Client for the Unsplash API

   

   Website: unsplash.com

5. Tailwind CSS

   4 1,500 87,351 9.9 TypeScript

   A utility-first CSS framework for rapid UI development.

   

   Website: tailwindcss.com

6. Sass

   5 222 15,247 8.4 TypeScript

   Sass makes CSS fun!

   

   Website: sass-lang.com

7. prettier

   6 481 50,296 9.8 JavaScript

   Prettier is an opinionated code formatter.

   

   Website: prettier.io

8. PostCSS

   7 96 28,760 8.8 TypeScript

   Transforming styles with JS plugins

   

   Website: postcss.org

9. InfluxDB

   influxdata.com featured

   InfluxDB high-performance time series database. Collect, organize, and act on massive volumes of high-resolution data to power real-time intelligent systems.

   

10. svgomg

    8 81 5,909 1.2 JavaScript

    Web GUI for SVGO

    

    Website: jakearchibald.github.io/svgomg/

11. Puts Debuggerer

    9 3,492 203 4.2 Ruby

    Ruby library for improved puts debugging, automatically displaying bonus useful information such as source line number and source code.

    

    Website: github.com

12. Bootstrap

    10 584 172,212 9.3 MDX

    The most popular HTML, CSS, and JavaScript framework for developing responsive, mobile first projects on the web.

    

    Website: getbootstrap.com

13. Google Fonts

    11 526 18,765 10.0 HTML

    Font files available from Google Fonts, and a public issue tracker for all things Google Fonts

    

    Website: fonts.google.com

14. flexboxfroggy

    12 493 7,076 6.3 JavaScript

    A game for learning CSS flexbox 🐸

    

    Website: flexboxfroggy.com

15. ESLint

    13 427 25,838 9.8 JavaScript

    Find and fix problems in your JavaScript code.

    

    Website: eslint.org

16. Visual Studio Code

    14 3,121 170,269 10.0 TypeScript

    Visual Studio Code

    

    Website: code.visualstudio.com

17. babel-sublime

    15 160 3,256 0.0 JavaScript

    Syntax definitions for ES6 JavaScript with React JSX extensions.

    

    Website: babeljs.io

18. CodeRabbit

    coderabbit.ai featured

    CodeRabbit: AI Code Reviews for Developers. Revolutionize your code reviews with AI. CodeRabbit offers PR summaries, code walkthroughs, 1-click suggestions, and AST-based analysis. Boost productivity and code quality across all major languages with each PR.

    

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