Stack by Code Red

Stack shows what the website you are on is built with, and what it keeps in your browser. Built with: the technologies on the page, grouped by kind: the framework and CMS, the online shop, the hosting, CDN and web server, the analytics, tag manager, ads and A/B testing, the payment and chat widgets, the cookie banner, fonts, UI kit and JavaScript libraries. • Recognises about 390 technologies in 25 categories, from front-end frameworks and content management systems to online shops, hosting providers and analytics tools. • Versions where the page shows them, read from the running code first. • A reason for every match: which script, header, meta tag, element or cookie gave it away. • Certain or likely: weak hints are marked as such instead of being passed off as facts. • Check server headers: one click, one request to the site, to add its web server, hosting and CDN. • Copy the list as text, JSON or CSV. Cookies: the site's own cookies, HttpOnly ones included, grouped by the technology that set them, with size, expiry and security flags. Search, sort, copy a value, and delete one cookie or all of the site's, with undo. Third-party cookies are not shown: that would need access to every site, which Stack does not ask for. Storage: the page's local and session storage, with sizes, readable JSON, copy and delete. A full-tab view for big sites, the count on the toolbar icon if you want it, and an optional history of the sites you checked, kept on this device and off until you turn it on. Stack only looks at the tab you open it on, when you click its icon: it has no access to other sites and runs nothing in the background. No ads, no tracking; nothing is sent anywhere. The optional header check makes one request to the site you are looking at. Free, and no account needed. Signing in with your Code Red account is optional. Tips keep it free.