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Instantly find out what CMS any website is using. Detect WordPress, Shopify, Wix, Webflow, and more. What CMS is this? Instantly detect the CMS any website uses—WordPress, Shopify, Wix, Webflow & more. Free. What CMS is this website using? Find out in one click. What CMS Is This is a free Chrome extension from Content Toolkit that instantly identifies the content management system behind any website you visit. Open a site, click the extension, and get a clear answer—no signup, no setup. Detect popular platforms including via Content Toolkit’s CMS scanner How it works 1. Local detection scans the current tab for CMS fingerprints (fast and private). 2. If needed, we fall back to Content Toolkit’s deeper CMS detector. 3. Open the matching CMS page on Content Toolkit to explore features, alternatives, and details. Who it’s for • Developers checking a prospect’s or competitor’s tech stack • Designers researching how sites are built • Marketers and agencies doing competitive analysis • Anyone asking “what CMS is this,” “what CMS is this website using,” or “what CMS does this site use” Privacy-first Detection runs when you ask. We analyze the active tab locally first. A page URL is only sent to Content Toolkit if local detection needs a deeper scan. No browsing history is stored in the extension. Privacy policy: https://www.contenttoolkit.co/privacy/chrome-extension Web scanner: https://www.contenttoolkit.co/what-cms Stop guessing. Ask “what CMS is this”—and get the answer instantly.
Sep 9, 2026
rating_count is the Chrome Web Store ratings count, not a written-review count.
Media assets
Screenshots and videos on the listing.
Has promo video
Whether the listing includes at least one video.
Languages
Declared language locales.
Developer website
Listing exposes a developer website URL.
Contact email
Listing exposes a contact email.
Keyword in name
Case-insensitive substring match in the name.
Keyword in description
Case-insensitive substring match in the description.
Keyword occurrences in description
Count of case-insensitive occurrences in the description.
Category user-count percentile
Share of same-category extensions with fewer users (null if unknown).
These are transparent listing completeness / keyword signals, not a prediction of Chrome Web Store search ranking.