jplag/JPlag
State-of-the-Art Source Code Plagiarism & Collusion Detection. Check for plagiarism in a set of programs. observed · 2026-08-28
Health v2 · maintenance only
77/100
- Activity 99
- Release rhythm 36
- 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: 97
- age_days: 4183
- days_rel: 265
- days_push: 7
- n_releases_24m: 4
Adoption not part of the score
1939 stars · 376 forks observed · 2026-08-28
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded
JPlag is a Java-based tool that detects plagiarism and collusion in sets of source code programs by computing pairwise similarities locally. It supports many programming languages and works even on obfuscated code without uploading any source code online.
Use cases
- detect plagiarism in student programming assignments
- check if two codebases are similar
- find collusion among students in a programming course
- compare source code similarity offline without uploading code
- detect obfuscated code copying
- check submissions for academic dishonesty
When to choose
- grading programming assignments in CS education
- you need local, privacy-preserving similarity analysis
- you need support for many programming languages
- you need to detect obfuscated plagiarism
When to avoid
- you need a hosted plagiarism service with a web UI
- you need natural-language text plagiarism detection
- you need real-time code similarity checking in an IDE
Facets
cli-tool · maturity active
parser developer-tools search-engine education developer-tools programming-languages security jvm cli cross-platform plagiarism-detection code-similarity academic-integrity collusion-detection source-code-analysis
2 sources
- readme: https://github.com/jplag/JPlag · fetched 2026-08-28 · 980a0fb671ce
- homepage: https://jplag.de · fetched 2026-08-29 · 3a5537f1077e
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| jplag/JPlag | main | 77 |
For agents
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem