How to Detect the Tech Stack of Any Website (2026 Guide)

If you’ve ever wondered: What tech stack does this website use? Is this site built with React, Next.js, or something else? What analytics or tracking tools are running behind the scenes? You are not alone. Understanding a website’s tech stack is useful for: Developers analyzing architectures Founders studying competitors Marketers identifying tracking tools Agencies auditing client websites In this guide, I will walk you through how to detect the tech stack of any website, using both manual methods and automated tools. WHAT IS A WEBSITE TECH STACK? A website’s tech stack includes all the technologies used to build and run it, such as: Frontend frameworks (React, Vue, Angular) Backend technologies (Node.js, PHP, Python) Hosting/CDN (Cloudflare, AWS, Vercel) Analytics tools (Google Analytics, Microsoft Clarity) Marketing and tracking tools Understanding this stack gives you insights into how a website works and how it scales. METHOD 1 — USE A TECH STACK DETECTION TOOL (FASTEST) The easie