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