Top 21 Code Challenge Resources For Developers

Build real-world projects with Figma designs and an AI copilot in a zero-config browser IDE.

India’s Fairest Technical Test | Trusted by 300+ Companies.

Recognized certification exams for Vue (official certification endorsed by Evan You), React, Angular, Nuxt, and JS. We’ve helped developers from 680+ companies worldwide validate their frontend skills.

Learn competitive programming with the help of CodeChef.

Improve your coding skills with our library of 300+ challenges and prepare for coding interviews with content from leading technology companies.

Codewars is where developers achieve code mastery through challenge. Train on kata in the dojo and reach your highest potential.

CodinGame is a challenge-based training platform for programmers where you can improve your coding skills with fun exercises (25+ languages supported).

As a free css gradient generator tool, this website lets you create a colorful gradient background for your website, blog, or social media profile.

CSS Code Golfing is Here!

DevChallenges.io is a community and a platform for anyone who wants to become a Software Engineer by building real-life projects and solving practical tasks. devChallenges.io is built with the goal of enabling you to build an outstanding portfolio.

Learn, Write, Master: HTML/CSS Through Real UI Challenges.

Learn to code with fun, bite-sized challenges. Gain XP, unlock achievements and level up. It's like Duolingo for learning to code.

Code Practice and Mentorship for Everyone. Level up your programming skills with 1,879 exercises across 38 languages, and insightful discussion with our dedicated team of welcoming mentors. Exercism is 100% free forever.

Improve your front-end skills by building real projects. Solve real-world HTML, CSS and JavaScript challenges whilst working to professional designs.

Frontend interview prep platform with hands-on JavaScript, UI, and DOM-oriented coding challenges.

HackerRank is the market-leading technical assessment and remote interview solution for hiring developers. Learn how to hire technical talent from anywhere!

Learn JavaScript in an interactive environment. Read short lessons, take notes, and complete challenges directly in your browser.

Level up your coding skills and quickly land a job. This is the best place to expand your knowledge and get prepared for your next interview.

Practice 8,500+ real tech-interview questions from 400+ top companies — coding, SQL, ML, and system design — in an in-browser console with AI-assisted hints.

A website dedicated to the fascinating world of mathematics and programming.

Learn React in an interactive environment. Understand how React works not just how to build with React.