10 amazing coding challenge websites to test your coding skills

Coderbyte 

Beginner — Intermediate

They also provide courses in: Algorithms & Data Structures, Web Developmentcoding bootcamps.


Codewars

Beginner — Intermediate


CodeFights

Beginner — Intermediate


CodinGame

Beginner — Intermediate


TopCoder 

Intermediate — Advanced

They also offer sponsored competitions where you can win prizes


HackerRank

Intermediate — Advanced


LeetCode 

Intermediate — Advanced

They also provide: Mock Interview section for job interview preparation, coding contests and  articles


CodeChef 

Intermediate — Advanced


GeeksforGeeks 

Intermediate — Advanced


Codeforces

Advanced


Source: Daniel Borowski

Photo by Stanley Dai

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