DMOJ/online-judge
A modern open-source online judge and contest platform system. observed · 2026-08-28
Health v2 · maintenance only
67/100
- Activity 99
- Release rhythm 8
- Longevity 100
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-03. Adoption (stars, forks) is never an input.
- gap_med: n/a
- age_days: 4557
- days_rel: n/a
- days_push: 9
- n_releases_24m: 0
Adoption not part of the score
1182 stars · 451 forks observed · 2026-08-28
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded
DMOJ is a modern open-source online judge and contest platform for hosting programming competitions and practice problems. It supports sandboxed judging in over 60 language runtimes, multiple contest formats, Elo-style rating, and rich problem statements with LaTeX and PDF export.
Use cases
- host a competitive programming contest
- run a coding practice site for students
- set up a self-hosted online judge
- grade programming submissions automatically
- organize national olympiad informatics competitions
- track coder ratings with Elo-style ranking
- create programming problems with LaTeX statements
When to choose
- you need a battle-tested judge that has hosted national olympiads
- you want support for interactive and signature-graded tasks
- you need many contest formats like ICPC, IOI, or AtCoder out of the box
- you require judging in dozens of programming languages with per-language limits
When to avoid
- you only need a simple quiz or multiple-choice assessment tool
- you want a lightweight single-page coding playground without user accounts
- you cannot operate the separate judge-server component and its sandboxing requirements
- you need a commercial turnkey product with vendor support
Facets
application · maturity active
web-framework api-framework auth authorization search-engine data-visualization documentation markdown pdf email developer-tools education web-development programming-languages self-hosted gaming-tools python self-hosted online-judge competitive-programming contests code-grading judge-server django rating-system plagiarism-detection algorithms web-server docker linux
1 source
- readme: https://github.com/DMOJ/online-judge · fetched 2026-08-28 · e1e99a938651
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| DMOJ/online-judge | main | 67 |
For agents
markdown · JSON · MCP: product_card(name="DMOJ/online-judge")
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem