Online Judge
Verwandlung Online Judge
Stars Live verwandlung.org Introduction An Online Judge (OJ) is a web-based system used in competitive programming. It presents algorithmic problems, accepts code submissions in various languages, automatically compiles and runs the code against hidden test cases, and immediately tells the user whether their solution is correct, all without any human involvement in the grading process. Platforms like LeetCode and Codeforces are well-known examples. Verwandlung Online Judge is a self-hostable, open-source OJ built for running your own contests or practice environment. Its main distinguishing feature at the time of release was cross-platform support: most open-source OJs were Linux-only due to their reliance on Linux-specific sandboxing APIs, whereas Verwandlung runs natively on both Windows and Linux.