What is this website built with?
Enter any website to see its technology: the framework (Next.js, React, Vue…), the CMS or site builder (WordPress, Webflow, Framer, Shopify…), the CSS framework, analytics and marketing tools, and where it is hosted.
Free, no sign-up. Works with any public page.
How to use the Website Technology Checker
- 1
Paste a link
Enter the address of the site you want to look up.
- 2
See the stack
Get the technologies grouped by type, each with the clue it was found from.
- 3
Plan your build
Use what you learn to choose your own stack, or to plan a migration of your site.
What you can use it for
- See whether a site was made with Webflow, Framer, WordPress or custom code — useful when you plan a migration or quote a client.
- Research competitors’ stacks: analytics, chat, payments and hosting.
- Check that your own site’s analytics, tag manager and security tools actually load.
- Qualify leads for an agency by the platform their site runs on.
Need the whole website?
Download every page as HTML, CSS, JavaScript and images
Save one page or up to 300 pages of a site as a ZIP that opens offline — including your own pages behind a login. Back it up, read it offline, or migrate your site with Claude Code or Cursor. Plans from $3.99 a month.
Frequently asked questions
How does the technology checker work?
It looks for tell-tale signs each technology leaves in a page — file paths, script names, special attributes and response headers — and lists every match with the clue it found.
Why is a technology missing?
Some tools leave no trace in the HTML or hide it on purpose, and some only load after you interact with the page. The checker lists what it can prove from the page itself.
Can it tell what the back end or database is?
Only when the server says so in its headers (like PHP or ASP.NET). Databases and server code are never visible from the outside.
I want to move my site to a new stack — what next?
Download your site’s HTML, CSS and images with the Website Downloader, then give the files to Claude Code or Cursor and ask it to rebuild your site in the stack you want.
Is it free?
Yes, free without an account, within a fair-use limit per hour.
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