Free / no signup

Free Code Judge

No account, no key, rate-limited per IP. It's the same engine that powers our coding judge.

Submission

Pick a language and edit the code. Runtimes come straight from the backend registry.

Verdict mode

Judged runs hidden tests and returns per-test results. Free-run executes a command and returns stdout / stderr / exit code.

Timings are itemized in the result.

Use it from your own code

If you want real throughput for a course or product, an organization API key lifts the limits.

curl -X POST https://backend.algoholia.com/api/judge/public/submissions \
  -H "Content-Type: application/json" \
  -d '{
    "runtime": "python",
    "files": {"main.py": "def add(a, b):\n    return a + b\n"},
    "tests": {"test_main.py": "import sys\nsys.path.insert(0, \"..\")\nfrom main import add\n\ndef test_add():\n    assert add(2, 3) == 5\n"},
    "evaluator": "python_pytest"
  }'