wappalyzer-python3

wappalyzer-python3 identifies the technologies used on websites — CMS, frameworks, analytics, payment processors, web servers and more — with versions and categories.

It is a maintained fork of the archived chorsley/python-Wappalyzer by Chris Horsley and contributors, with the following changes:

• Replaced deprecated pkg_resources resource loading with importlib.resources (fixes Python 3.12+ environments without setuptools).
• Replaced the external cached_property dependency with functools.cached_property.
• Removed the deprecated sre_compile import.
• Removed async support (new_from_url_async / new_from_response_async), dropping the aiohttp dependency. The sync API is unchanged.
• Offline-only test suite; packaging modernized for republication.

Installation

pip install wappalyzer-python3

Usage

Analyze a live URL:

from Wappalyzer import Wappalyzer, WebPage

wappalyzer = Wappalyzer.latest()
webpage = WebPage.new_from_url('https://example.com')
results = wappalyzer.analyze_with_versions_and_categories(webpage)
# {'WordPress': {'categories': ['CMS', 'Blogs'], 'versions': ['5.4.2']}, ...}

Analyze HTML you already fetched (no HTTP request is made):

from Wappalyzer import Wappalyzer, WebPage

wappalyzer = Wappalyzer.latest()
webpage = WebPage('https://example.com', html=html_string, headers={'Server': 'nginx'})
results = wappalyzer.analyze_with_versions_and_categories(webpage)

Warning: do not use Wappalyzer.latest(update=True)

update=True downloads the current technologies.json from the AliasIO repository, which uses a newer schema (scriptSrc keys). The engine matches on the older scripts key used by the bundled data file, so updating silently disables script-based detection. Use the bundled fingerprints (the default) or pass your own old-schema file via technologies_file=.

Credits

Original work by Chris Horsley (chorsley) and contributors. Fingerprint data from the AliasIO/wappalyzer project.

License

GPLv3 — see LICENSE. This package is a modified version of python-Wappalyzer; the list of changes above constitutes the notice of modification required by GPL §5.