Free CMS Detector
Enter any website. We read its page source and headers and show the CMS, e-commerce platform, framework, hosting and analytics it runs on, with the evidence for each. No sign-up.
- 01Enter a website
- 02We read its code
- 03See what it runs on
theStacc writes SEO articles for your site every week and audits it for search and AI visibility.
Sign up for free →What CMS is this website using?
A CMS detector answers that from the site itself. Every platform leaves fingerprints: WordPress serves files from /wp-content/, Shopify from cdn.shopify.com, Next.js embeds __NEXT_DATA__, Cloudflare adds a cf-ray header. This tool fetches the page, looks for those fingerprints and shows you the evidence for each match.
How it works
- Enter any website. Yours, a competitor's or a site you admire.
- We read its code. Our server requests the page and checks its HTML and response headers against more than 50 signatures.
- You see what it runs on, grouped into CMS, e-commerce, framework, hosting, server, analytics and marketing, each with the evidence.
What you can do with it
- Research competitors. See which platform and tools the sites ranking above you use.
- Plan a migration. Confirm the current stack before you quote or plan a move.
- Check your own site. Find leftover tags and scripts from tools you no longer use.
- Qualify leads. Agencies can check which prospects run a platform they support.
Frequently Asked Questions
We request the page from our server and look for signatures in its HTML and response headers: asset paths such as /wp-content/ or cdn.shopify.com, the meta generator tag, headers such as x-shopid or cf-ray, and framework markers such as __NEXT_DATA__. Every result shows the evidence we found.
CMSs and site builders (WordPress, Drupal, Joomla, Ghost, Wix, Squarespace, Webflow, Framer, Duda, Weebly, HubSpot CMS), e-commerce (Shopify, WooCommerce, Magento, BigCommerce, PrestaShop), frameworks (Next.js, Nuxt, Astro, Gatsby, SvelteKit, Remix, Angular, React, Vue), hosting and CDNs (Cloudflare, Vercel, Netlify, Fastly, CloudFront), servers, analytics and marketing tags, page builders and SEO plugins.
The site may be custom-built, or it may remove the usual signatures (for example by hiding the generator tag or serving assets from its own domain). Some sites also block requests from servers, in which case the result notes the HTTP status we received.
It reports only what the page shows, so it does not guess. A theme can hide WordPress paths, and a site can load a script it does not really use. Check the evidence line under each result.
The platform decides how easily you can edit titles, URLs, redirects, structured data and page speed, and which tools can publish content for you. Knowing a competitor's platform also shows what their team can do quickly.
No. We request the page when you click Detect and keep nothing. The tool is free with no sign-up; each visitor can run a limited number of checks in a short period.
Last updated 2026-09-28.
Explore theStacc software
Detecting a CMS is free. theStacc publishes SEO-ready posts straight into WordPress for you.
Sign up for free →