Firstino

See what any website is built with: CMS, frameworks, libraries, analytics and hosting.

Firstino shows you what any website is built with. Click the button on a page and see its CMS, ecommerce platform, JavaScript frameworks, analytics tools, CRM, live chat, payment providers, CDN, web server and more, with version numbers where they can be detected. What you can do with it • Check which technologies a site you’re browsing uses • See version numbers for frameworks and libraries • Open a full report on firstino.io for the whole site, including its subdomains • Spot the tools your competitors or customers rely on How it works Firstino looks at the page you’re on: the scripts it loads, its HTML, meta tags, cookie names and JavaScript variables. It compares them against a database of more than 7,000 technology fingerprints and shows you the result in a second. Privacy first Nothing leaves your browser until you give consent in the extension’s settings. Even then, Firstino only sends data when you click the button, and only about the page you clicked on. It sends the page address (without query strings or tokens), the technologies found and the technical signals used to find them. It never sends form input, passwords, cookie values, your browsing history, or anything from private networks or incognito windows. There is no account and no sign-up. A random ID is created on install; it’s not linked to you. You can export or delete your data at any time from the settings page. Full policy: https://firstino.io/privacy Open to everyone Firstino is free to use. The results you see help build a public picture of how the web is built, which you can explore at https://firstino.io.