Wappalyzer

Wappalyzer is a free, open-source browser extension developed by a Czech company, Alerzo s.r.o. The tool is primarily designed to analyze web applications and websites, providing detailed information about the underlying technologies and frameworks used in their construction. This information can be valuable for web developers, security experts, and researchers, as it enables them to better understand the technical infrastructure of a website and identify potential vulnerabilities.

Wappalyzer scans websites and extracts data on their technology stacks, including details about JavaScript libraries, server-side programming languages, content management systems (CMS), and e-commerce platforms. The extension supports over 5,000 technologies and frameworks, making it a comprehensive tool for technical analysis. Upon activation, the extension accesses a website's source code and resource data, and displays the extracted information in an easily readable format.

One of the key features of Wappalyzer is its ability to highlight technology stacks, which can be useful for identifying patterns and anomalies in a website's behavior. The tool can also help track the evolution of a website's technology stack over time, providing valuable insights for developers and project managers. Wappalyzer is available as a browser extension for Google Chrome, Mozilla Firefox, and Microsoft Edge, and is free to use, with optional premium features for advanced analysis and support. By providing detailed insights into website technology stacks, Wappalyzer serves as a valuable resource for a wide range of technical and non-technical users.