Run real code.
Every submission runs on our own sandboxed execution engine — 60+ languages, with stdout / stderr captured and graded against your test cases.
Coding events,
judged correctly.
Code Arena hosts timed coding rounds for classrooms, internship screens, and hackathons. Sign up, register for an event, and submit code that's graded by real sandboxes.
What you get
The boring infra. Done well.
Everything you need to run a coding event from signup to final scoreboard. No surprises.
Verified accounts.
Sign up with your email + institution, verify in one click, and you're in. Admins keep the platform clean from spam accounts.
Per-event throttling.
Admins set the cool-down between consecutive submissions per event. Stops spam and keeps the leaderboard honest.
Tie-broken leaderboards.
Rank by score, then total submissions, then sum of execution time. Reward correctness and efficiency together.
Ready to compete?
Sign up in 30 seconds, verify your email, browse open events, and start submitting.