# RuntimeBrowser

Objective-C Runtime Browser, for Mac OS X and iOS

Repository: https://github.com/nst/RuntimeBrowser
Canonical: https://ross.abutalabs.com/products/runtimebrowser
Language: Objective-C
License Family: other
Last push: 2026-05-19T15:39:26+00:00
Link (homepage): https://github.com/nst/RuntimeBrowser

## Health v2 (maintenance only)
Score: 70/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 83, release rhythm 35, longevity 100
- inputs: {"age_days": 5643, "days_push": 106, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 3658, forks 521 (observed 2026-08-28T04:08:13.226284+00:00)

## What it is
RuntimeBrowser is a class browser for the Objective-C runtime on iOS and OS X that exposes all loaded classes, methods, and dynamically generated header files. The companion iOS-Runtime-Headers repo hosts the resulting runtime-derived Objective-C headers for each iOS version.

## Use cases
- browse all Objective-C classes loaded in the iOS runtime
- inspect private framework classes and methods on an iPhone
- generate and diff Objective-C headers across iOS versions
- search private API headers for classes or selectors
- dynamically load frameworks and invoke methods at runtime
- explore undocumented iOS APIs before using them

## When to choose
- you need to discover or document private Objective-C APIs on iOS or OS X
- you want to compare framework interfaces between iOS releases
- you're doing security research or reverse engineering of Apple frameworks

## When to avoid
- you need Swift runtime introspection rather than Objective-C
- you want a supported tool for shipping apps using private APIs
- you need actively maintained tooling with recent updates

## Facets
- artifact type: application
- maturity: maintenance
- function: reverse-engineering, developer-tools, documentation
- domain: apple-ecosystem, developer-tools, reverse-engineering
- platform: -
- tags: objective-c-runtime, introspection, private-headers, ios-headers, class-browser, ios, macos, objective-c

## Member repositories
- nst/RuntimeBrowser (main) score 70
- nst/iOS-Runtime-Headers (docs) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:08:13.226284+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 2026-08-29T17:32:36.246091+00:00, confidence not recorded.
  - readme: https://github.com/nst/RuntimeBrowser (fetched 2026-08-28T04:08:13.226284+00:00, sha e5608bc49c0a)
  - homepage: https://github.com/nst/RuntimeBrowser (fetched 2026-08-29T08:29:37.029474+00:00, sha 4439ee7bd451)
- Data as of 2026-08-30T08:39:29.467469+00:00.