# chame1eon/jnitrace

A Frida based tool that traces usage of the JNI API in Android apps.

Repository: https://github.com/chame1eon/jnitrace
Canonical: https://ross.abutalabs.com/products/jnitrace
Language: TypeScript
License: MIT
License Family: permissive
Topics: android, jni, reverse-engineering, sre, frida, tracer, jni-api
Last push: 2023-07-18T20:38:50+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": 2599, "days_push": 1142, "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 1859, forks 293 (observed 2026-08-28T04:05:45.157872+00:00)

## What it is
jnitrace is a Frida-based command-line tool that dynamically traces JNI API calls made by native libraries in Android apps. It works like frida-trace or strace but specifically for the JNI, helping reverse engineers follow interactions between native code and the Android Runtime.

## Use cases
- trace JNI calls in an Android app's native library
- dynamically analyze how native code uses the Android Runtime
- reverse engineer obfuscated native libraries on Android
- monitor RegisterNatives and other JNI method usage
- reduce noise when tracing large JNI-heavy apps with include/exclude filters
- capture backtraces of JNI calls during app execution

## When to choose
- you need to understand what JNI API calls an Android app's native libraries make
- you already use Frida and want a strace-like tool for JNI
- manual static reverse engineering of native code is too slow

## When to avoid
- you need static analysis of native binaries without running them
- your target device cannot run a Frida server
- you are analyzing non-Android native code

## Facets
- artifact type: cli-tool
- maturity: stable
- function: reverse-engineering, tracing, developer-tools, security
- domain: reverse-engineering, security, android-tools, developer-tools
- platform: windows, cli, python
- tags: frida, jni, dynamic-analysis, android, native-libraries, tracer, linux, macos

## Member repositories
- chame1eon/jnitrace (main) score 23

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:45.157872+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 2026-08-30T03:15:58.831279+00:00, confidence not recorded.
  - readme: https://github.com/chame1eon/jnitrace (fetched 2026-08-28T04:05:45.157872+00:00, sha 4258f5dee457)
- Data as of 2026-08-30T08:39:29.467469+00:00.