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W3Techs Site Info vs WordPress Theme Detector: catalog facts
W3Techs Site Info	WordPress Theme Detector
Free The website lookup, bookmarklet and extensions are free to use; a separate API is offered.	Free Free to use.
Web, Browser extension	Web
Identifies CMS, language, web server and hosting provider Bookmarklet and Firefox and Chrome extensions for the current page	Identifies both the theme and active plugins No sign-up needed
Shows only what can be detected from outside the site Website carries advertising	Only useful for sites built on WordPress The site uses third-party analytics cookies
Web application, Browser extension	Web application
Closed source	Closed source
License not stated	License not stated
No account needed	No account needed
Needs internet	Needs internet
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 23, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.