Codewars - Achieve mastery through coding practice and developer mentorship Dojo Kata libraryComplete challenging kata to earn honor and ranks LeaderboardsAchieve honor and move up the leaderboards DocsLearn about all of the different aspects of CodewarsBlogFor EducatorsFor CompaniesCodewars RedLog inJoinWe have updated our Privacy Policy and Terms of Service. Learn more on the blog. Achieve masterythrough challengeImprove your development skills by training with your peers on code kata that continuously challenge and push your coding practice.Get Started Sharpen your coding skillsChallenge yourself on small coding exercises called "kata". Each kata is crafted by the community to help you strengthen different coding techniques. Master your current language of choice, or quickly pick up any of the 55+ programming languages supported.Join the Dojo Get instant feedbackSolve kata with your coding style right in the browser and use test cases (TDD) to check it as you progress. Retrain with new, creative, and optimized approaches. Find all of the bugs in your programming practice. Earn ranks and honorKata code challenges are ranked from beginner to expert level. As you complete higher-ranked kata, you level up your profile and push your software development skills to your highest potential.An engaged software development communityCodewars is a collective effort by its users. They are creators—authoring kata to teach various techniques, solving kata with solutions that enlighten others, and commenting with constructive feedback.75K+Community members added every month1M+Kata completed every month12K+Kata created by our community Tap into the collective wisdomCompare your solution with others after each kata for greater understanding. Discuss kata, best practices, and innovative techniques with the community. Have your mind blown by how different other solutions can be from your own. Create your own kataAuthor kata that focus on your interests and train specific skill sets. Challenge the community with your insight and code understanding. Create everything from common developer interview questions to challenges that push the limits of your creativity. Gain honor within the coding dojo.What can I use Codewars for?From beginner to expert and beyond... Get new perspectivesSolve challenges then view how others solved the same challenge. Pickup new techniques from some of the most skilled developers in the world. Learn new languagesSolve challenges in a language you are comfortable with, then do it in a language you want to improve with. Level up across different languages. Compete with peersCompete against your friends, colleagues, and the community at large. Allow competition to motivate you  towards mastering your craft.Extremely well done and an excellent example of mastery learning.Ahmed Omran@this_ahmedAccidentally got addicted to codewars, oops.Kelly WilliamsCoder Build self-confidenceNot sure if you are progressing well as a programmer? Push yourself to your limits and show yourself what you are really made of. Become a mentorLend your expertise to others, either indirectly by contributing great solutions or directly by creating your own kata and reviewing code.The latestInsights from Codewars staff and community.Product NewsWhat's new on Codewars: Language Runtime UpdatesSaheed BadruJune 1, 2026Competitions Kata Forge: The Language SprintSaheed BadruJune 22, 2026How many Kata did you complete in 2024?2024 was one of our busiest years yet; let's take a moment to celebrate it.Vanessa GreeneJanuary 14, 2025codewars IS BUILT ONThe world's most advanced coding assessment platform for organizations looking to scale their hiring, upskilling, and certification programs.Learn moreAchieve masterythrough challenge.Top languagesCC#C++DartGoHaskellJavaJavaScriptKotlinLuaPHPPythonRRubyRustScalaSoliditySQLSwiftTypeScriptdojoKata LibraryLeaderboardDocsdevelopersBlogPartner SchoolsGet HiredMissionsPrevieweducatorsEducator PartnershipsAssess StudentscompaniesSkill AssessmentsFind Candidates© 2026 Andela. All rights reserved.Built on Qualified.ioAPIPrivacy PolicyTerms of ServiceAbout