---
title: "Website Technology Checker: Tech Stack Lookup"
description: "Free website technology checker: enter a URL to see its CMS, framework, server, CDN and analytics, each with the header, tag or script that shows it."
canonical: "https://browser-use.com/tools/website-technology-checker"
last_updated: "2026-11-14"
---

# Website Technology Checker: Tech Stack Lookup

## Website Technology Checker

See what a website is built with. Every technology found shows the header, tag, script or cookie that gave it away.

## How it works

### Enter a URL

Our server fetches that one page, following up to 5 redirects. No JavaScript runs.

### Read the evidence

Each technology lists what matched: a header, meta tag, script URL or cookie name, marked strong or weak.

### Copy the report

Copy or download it as JSON.

### How does it detect a technology?

With rules we wrote from each vendor's own docs: a Server or X-Powered-By header, a meta generator tag, a script or file path, a cookie name. Each result links the doc its rule is based on. A generator tag is shown as the page declares it.

Source: [MDN: Server header](https://developer.mozilla.org/en-US/docs/Web/HTTP/Reference/Headers/Server) · [HTML standard: meta generator](https://html.spec.whatwg.org/multipage/semantics.html#meta-generator)

### What do strong and weak mean?

Strong: a header, tag or file path the vendor documents, like WordPress's /wp-content/ on the site itself. Weak: a default name anyone can reuse, like the PHPSESSID cookie or a file named jquery.js. Both can be faked or removed.

Source: [WordPress: content directories](https://developer.wordpress.org/plugins/plugin-basics/determining-plugin-and-content-directories/) · [PHP: session.name](https://www.php.net/manual/en/session.configuration.php#ini.session.name) · [jQuery CDN: release files](https://releases.jquery.com/jquery/)

### Why is a technology missing?

Only the original HTML and the final response headers are read. Tools that JavaScript adds later (often through Google Tag Manager), server software that sends no header, and anything a site hides are not seen. Not found does not mean not used.

### What does it fetch?

One URL, up to 5 redirects and the first 2 MB, as BrowserUseTools/1.0. Private and local addresses are refused. No JavaScript runs, nothing else loads and nothing is stored. Cookie values are never kept or shown, only names.

## Need the page after JavaScript runs?

Browser Use agents open pages in a real browser, including dynamic ones, and return structured data.

[See AI web scraping](https://browser-use.com/web-scraping)

Website URL

Check technologies

Our server fetches this one URL. No JavaScript runs, so tools added later, often through Google Tag Manager, are not seen.

What it checks (39 technologies)

CMS and site builders

WordPress, WooCommerce, Shopify

Frameworks

Next.js, Nuxt, Gatsby, Astro, SvelteKit, Express, Django

Programming languages

PHP, Java (servlet container)

Web servers

Nginx, Apache HTTP Server

CDN and hosting

Cloudflare, Amazon CloudFront, Fastly, Vercel, AWS Elastic Load Balancing

Analytics and tags

Google Tag Manager, Google tag (gtag.js), Google Analytics, Meta Pixel, Segment, PostHog, Cloudflare Web Analytics, Vercel Web Analytics, Sentry

Marketing and support

Intercom

Payments

Stripe.js

Security and consent

Google reCAPTCHA, hCaptcha, Cloudflare Turnstile, Cookiebot

Fonts and UI libraries

Google Fonts, Font Awesome, jQuery, Bootstrap, Tailwind CSS (Play CDN)

Plus any `<meta name="generator">` the page declares.

---

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