# zxh0/classpy

GUI tool for investigating Java class files

Repository: https://github.com/zxh0/classpy
Canonical: https://ross.abutalabs.com/products/classpy
Language: Java
License: MIT
License Family: permissive
Topics: jvm, lua, wasm, bitcoin
Last push: 2022-10-27T01:10:17+00:00

## Health v2 (maintenance only)
Score: 23/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 8, longevity 100
- inputs: {"age_days": 4404, "days_push": 1407, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1137, forks 266 (observed 2026-08-28T04:03:43.931450+00:00)

## What it is
Classpy is a JavaFX-based GUI tool for investigating binary file formats, including Java class files, Lua 5.3 binary chunks, Wasm binaries, and Bitcoin raw blocks and transactions. It displays parsed files as a tree alongside hex text, highlighting the corresponding hex when a tree node is selected.

## Use cases
- inspect java class file structure
- view bytecode of a .class file
- parse lua binary chunk format
- decode wasm binary code
- analyze bitcoin raw block and transaction format
- learn jvm class file format
- view binary file as tree and hex

## When to choose
- you want a visual, interactive way to explore Java class files or other binary formats
- you are learning the JVM class file format, Lua chunk format, Wasm, or Bitcoin block structure
- you want tree and hex views linked with highlighting

## When to avoid
- you need automated or scripted class file analysis in a build pipeline
- you need a headless CLI disassembler like javap
- you need support for binary formats beyond those listed

## Facets
- artifact type: application
- maturity: maintenance
- function: parser, gui, developer-tools
- domain: developer-tools, programming-languages, parsers
- platform: cross-platform, jvm
- tags: java-class-file, bytecode, jvm, lua-binary-chunk, wasm, bitcoin, javafx, hex-viewer, binary-format, macos

## Member repositories
- zxh0/classpy (main) score 23

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:03:43.931450+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T06:36:23.358886+00:00, confidence not recorded.
  - readme: https://github.com/zxh0/classpy (fetched 2026-08-28T04:03:43.931450+00:00, sha ab94681ca00a)
- Data as of 2026-08-30T08:39:29.467469+00:00.