November 6, 2026
To find out what a website is built with, paste its address into a tech stack checker. The free one on this site loads the page in a real browser and lists the platform or CMS, the front-end framework, analytics, payment and tag tools, and the hosting it can recognise. You can also check by hand: the page source gives away most platforms in one search, and the table below lists what to look for.
What does a tech stack checker show?
Each result comes from the rendered page, not the raw HTML, so a chat widget or a pixel that a script adds after load still shows up. We ran the checker on allbirds.com on November 6, 2026 and it returned this:
| Group | Found | How it was seen |
|---|---|---|
| Platform | Shopify | a global the page defines |
| Analytics | Google Analytics, Microsoft Clarity | globals the page defines |
| Tags | Google Tag Manager | a file the page loads |
| Ads | Meta Pixel | a global the page defines |
| UI | Tailwind CSS | markup on the page |
The last column matters. A name is only listed when the page gives a concrete sign of it, so a result is evidence, not a guess.
Why does a checker sometimes find nothing?
Stripe's homepage is a useful case. The same checker lists no platform and no framework for stripe.com, because the site is built in house and does not load recognisable third-party tools in a way a browser can name. Read a blank result as “nothing recognised on this page”, and try another page of the same site before drawing a conclusion.
How can I tell what a website is built on by hand?
View the page source (right-click the page, then View page source) and search for these. Any one of them is a strong sign; two together are close to proof.
| Built with | Search the source for |
|---|---|
| WordPress | /wp-content/, /wp-includes/, a generator meta tag that says WordPress |
| Shopify | cdn.shopify.com, Shopify.theme |
| Webflow | data-wf-site and data-wf-page on the html tag, Webflow's w- class names |
| Framer | framerusercontent.com |
| Squarespace | static1.squarespace.com |
| Wix | static.wixstatic.com |
| Next.js | /_next/static/, a __NEXT_DATA__ script |
| Nuxt | __NUXT__, /_nuxt/ |
| Gatsby | an element with the id ___gatsby |
For the hosting, open the DevTools Network tab, reload, click the first request and read its response headers. Headers such as
server, x-vercel-id or cf-ray point at the CDN or host, when the site sends them.
How do I check if a website is made in WordPress?
- Open the page source and search for
/wp-content/. Almost every WordPress site loads theme, plugin and upload files from that folder. - Search for
generatorand see whether the meta tag names WordPress. - Add
/wp-json/to the site address. A page of JSON means the WordPress REST API is on. - If all three come back empty, the site may be hiding them or may not be WordPress. Run the checker for a second opinion.
What can a tech stack checker not see?
A browser only sees the front. The back-end language, the database and most hosting leave no trace on the page, so this tool does not guess them. It lists what it can point to. If a tool is missing, it either is not on this page or runs entirely on the server. For how the page is put together once it loads, the animation library checker and the design token extractor read motion and design values from the same live page.
Where to go next
- Website tech stack checker: the free tool this guide uses.
- What 107 top websites use: fonts, motion and 3D, measured.
- How to check if a website uses GSAP.
FAQ
How do I find out what a website is built with?
Paste the address into a tech stack checker, such as the free one at enrichr.dev. It loads the page in a real browser and lists the platform or CMS, front-end framework, analytics, payment, tag and hosting tools it can recognise. You can also check by hand: view the page source and search for platform file paths like /wp-content/ or cdn.shopify.com.
How can I tell if a website is built on WordPress?
Open the page source and search for /wp-content/ or /wp-includes/. Almost every WordPress site loads files from those folders. Many also have <meta name="generator" content="WordPress">, and the address /wp-json/ answers on most sites. A site can hide all three, so a missing result is not proof.
What CMS is this website built on?
Look at the platform row of a checker first: it names the CMS or site builder when the page gives away a clear sign. Without a tool, look for the platform's file paths: WordPress uses /wp-content/, Shopify uses cdn.shopify.com, Squarespace uses static1.squarespace.com, Wix uses static.wixstatic.com and Framer uses framerusercontent.com.
What technology is this website built on?
The visible layers are the platform or CMS, the front-end framework (React, Vue, Svelte, Next.js and others), the analytics and tag tools, the payment provider and the CDN. A browser can read those. The server language and the database stay hidden unless the site exposes them in a file name or header.
Why did the checker find nothing on my site?
Either the page really has no third-party tools, or it is built so that a browser sees few signs. Stripe's homepage is an example: it is built in house, so the checker lists no platform or framework by name. A blank result means nothing was recognised on this page, not that the site has no stack.
Can I tell if a website was built with AI?
Not reliably. Some tools give a probability score from page signals, and their own authors warn that a low score does not rule AI out. A checker can show which builder or framework a site uses; it cannot show who or what wrote the code.
Does it work on a page behind a login?
No. It sees what a first-time visitor sees. Use the public page you care about.