Wappalyzer

Wappalyzer is a browser extension that uncovers the technologies used on websites. It detects content management systems, web shops, web servers, JavaScript frameworks, analytics tools and many more.

Free Open Source Windows Linux Mac Chrome Firefox

Firefox Lightbeam

Lightbeam is a Firefox add-on that uses interactive visualizations to show you the first and third party sites you interact with on the Web.

Free Open Source Windows Linux Mac Firefox

BuiltWith

BuiltWith shows what tools, widgets, and languages are being used to show webpages and webapps, and does so in a concise, categorized format.

Freemium

WhatRuns

WhatRuns offers browser extensions that give you information on the technology being used on websites you visit. WhatRuns uses a proprietary recognition algorithm to detect even the latest web technologies and plugins.

Free Web Chrome Firefox

SiteStacks

sitestacks by siftery is a helpful tool for discovering the technologies used by various websites.

Free Web

Shraga

Cross platform, cross browser, multi purpose tool for web developers, designers & webmasters.

Free Web

Yanalyzer

Know technologies used by any website by analyzing the website using YAnalyzer tool

Free Web