# Rob--W/crxviewer

Add-on / web app to view the source code of Chrome / Firefox / Opera 15 extensions and zip files.

Repository: https://github.com/Rob--W/crxviewer
Canonical: https://ross.abutalabs.com/products/crxviewer
Homepage: https://robwu.nl/crxviewer/
Language: JavaScript
License: MPL-2.0
License Family: copyleft
Last push: 2026-06-21T23:29:21+00:00

## Health v2 (maintenance only)
Score: 72/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 88, release rhythm 35, longevity 100
- inputs: {"age_days": 4805, "days_push": 73, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1712, forks 267 (observed 2026-08-28T04:05:25.861525+00:00)

## What it is
A browser add-on and web app for viewing the source code of Chrome, Firefox, Opera, Edge, and Thunderbird extensions without installing them. It can open CRX, XPI, NEX, and ZIP files from addon stores or local disk, with syntax highlighting, search, and download-as-zip features.

## Use cases
- inspect the source code of a chrome extension before installing it
- download a chrome web store extension as a zip file
- view contents of a crx or xpi file
- search inside an extension package for strings or regex patterns
- audit browser extension code for malicious behavior
- view source of a firefox addon from addons.mozilla.org
- open and browse a zip file in the browser

## When to choose
- you want to review or audit an extension's code before trusting it
- you need to download an extension package without installing it
- you want a quick in-browser viewer for crx/xpi/zip archives with search and syntax highlighting

## When to avoid
- you need to decompile native or obfuscated binaries beyond JavaScript beautification
- you need automated static security analysis rather than manual source viewing
- you are not working with browser extensions or zip-based packages

## Facets
- artifact type: plugin
- maturity: active
- function: developer-tools, parser, security, file-system
- domain: browser-extensions, developer-tools, security, reverse-engineering
- platform: browser, browser-extension, cross-platform
- tags: crx-viewer, extension-source-viewer, chrome-extension, firefox-addon, zip-viewer, code-inspection, web

## Member repositories
- Rob--W/crxviewer (main) score 72

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:25.861525+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 2026-08-30T03:34:51.430654+00:00, confidence not recorded.
  - readme: https://github.com/Rob--W/crxviewer (fetched 2026-08-28T04:05:25.861525+00:00, sha 0aa0b470fbf6)
  - homepage: https://robwu.nl/crxviewer/ (fetched 2026-08-29T11:11:14.037697+00:00, sha 5432ca20911b)
- Data as of 2026-08-30T08:39:29.467469+00:00.