Col-E/Recaf
The modern Java bytecode editor observed · 2026-08-28
Health v2 · maintenance only
69/100
- Activity 98
- Release rhythm 13
- 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: 3324
- days_rel: 367
- days_push: 12
- n_releases_24m: 1
Adoption not part of the score
7355 stars · 538 forks observed · 2026-08-28
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded
Recaf is a modern Java bytecode editor with a JavaFX GUI that abstracts away low-level class file complexities like constant pools and stack frame calculation. It supports editing, decompiling, deobfuscating, and recompiling Java and Android applications, plus attaching to running JVM processes for instrumentation.
Use cases
- edit java bytecode of a compiled jar
- decompile obfuscated java classes
- deobfuscate a minecraft mod jar
- rename obfuscated classes and export mappings
- attach to a running java process and instrument it
- patch anti-reverse-engineering class file tricks
- assemble bytecode from a simple syntax
When to choose
- you need to inspect or modify compiled Java or Android bytecode with a GUI
- you are reverse-engineering obfuscated JVM applications
- you want multiple configurable decompilers and mapping export in one tool
When to avoid
- you only need a headless bytecode manipulation library - use ASM directly
- you need to reverse non-JVM binaries
- you cannot run JDK 22+ with JavaFX 22+
Facets
application · maturity active
reverse-engineering security developer-tools gui plugin-system reverse-engineering security developer-tools cross-platform jvm java-bytecode decompiler deobfuscation javafx asm bytecode-editor static-analysis android-support java desktop
8 sources
- readme: https://github.com/Col-E/Recaf · fetched 2026-08-28 · 922d6a364c76
- homepage: https://recaf.coley.software · fetched 2026-08-29 · 78e9dd371db7
- site_page: https://recaf.coley.software/user/install/index.html · fetched 2026-08-29 · 44ccf7c38dde
- site_page: https://recaf.coley.software/user/install/requirements.html · fetched 2026-08-29 · 1e7b9330a686
- site_page: https://recaf.coley.software/user/install/via-launcher.html · fetched 2026-08-29 · f5b142652640
- site_page: https://recaf.coley.software/user/install/via-manual.html · fetched 2026-08-29 · 0fe85e05a4db
- site_page: https://recaf.coley.software/user/install/why.html · fetched 2026-08-29 · e926d457d6ad
- site_page: https://recaf.coley.software/dev/getting-started.html · fetched 2026-08-29 · f1f801afdbfe
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| Col-E/Recaf | main | 69 |
For agents
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem