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The WhatStack Chrome extension automatically detects CMS, frameworks, analytics, ad tech, and 12,000+ technologies on every website you visit.
Works on Chrome, Edge, Brave, and all Chromium browsers
The extension works silently in the background as you browse.
Visit any website as you normally would. The extension automatically looks up the site in our database of millions of pre-scanned domains.
A badge on the extension icon shows how many technologies were detected. Already-scanned sites show results instantly at no cost.
Click the icon to see technologies grouped by category — CMS, analytics, ad tech, payments, hosting, and more. Click any technology for its trend page.
The same comprehensive database as our API — CMS, frameworks, ad tech, SSPs, analytics, payments, and more.
Unlike other extensions that guess from HTML, WhatStack uses our full API — headers, DNS, ads.txt, and more.
Millions of sites are pre-scanned in our database. Cached results load instantly and don't cost any API credits.
Technologies are organized into 14 groups — CMS, ecommerce, analytics, ad tech, security, hosting, and more.
No browsing history collected. Optional anonymous data sharing helps improve detection for everyone.
Under 40 KB total. No bundled signatures, no heavy processing. Just a lightweight API call and a clean popup.
Already-scanned sites are always free. Only new scans use API credits.
Install the extension and see what every website is built with. Free to use, no account required for cached lookups.