[cms_detector]
Type a website address into the box above and the CMS Detector checks the site’s response headers and page code for signs of the platform it was built with. It is free, needs no sign-up, and usually takes a few seconds.
How to check what CMS a website uses
Enter the address
Type a domain such as
example.com, or paste a full page URL.Click Detect CMS
The tool downloads the page and looks for known platform signals.
Read the result
You get the platform, a confidence level and the clues behind it.
Which platforms can the CMS checker detect?
The tool recognises these content management systems and website platforms:
- WordPress
- Shopify
- Wix
- Squarespace
- Webflow
- Joomla
- Drupal
- Magento
- PrestaShop
- BigCommerce
- Ghost
- TYPO3
- Blogger
- + WooCommerce on WordPress sites
When a site runs WordPress, the result also tells you if it uses WooCommerce, and where it makes sense it shows the version number. If nothing matches, the result says “Unknown or custom CMS”. That can mean the site was custom-built, runs a platform not on this list, or blocks automated checks.
How CMS detection works
The tool downloads the page’s HTML and response headers, then looks for public clues in three places:
Generator tag
Many platforms announce themselves in a generator meta tag, sometimes with a version number.
Response headers
Servers often reveal the software behind a site, for example through a Shopify, Wix or Drupal header.
Page code and assets
Folder names and files give platforms away, such as WordPress’s /wp-content/ or scripts loaded from Shopify’s servers.
Each clue adds points to a platform and the one with the most points wins. The result shows the confidence level and the exact clues that were found. Site owners can hide or change these signals, so treat the result as a good indicator, not a guarantee.
Why check a website’s CMS?
- Before hiring a developer. Know which platform you would be working with and what skills the job needs.
- Planning a migration or redesign. See what a site is built on before you move it.
- Researching competitors or prospects. Learn which platforms the sites in your market use.
- Keeping a site secure. The platform tells you which updates and practices apply. For WordPress, start with our guide to essential WordPress security practices.
- Plain curiosity. See how your favourite sites are put together.
What is a CMS?
A content management system (CMS) is software that lets you create, edit and publish website content without writing code. It keeps the content (text, images, products) separate from the design and functionality, so several people can update a site safely. WordPress, Shopify, Joomla and Drupal are all examples.
More free tools
Frequently asked questions
Is the CMS detector free?
Yes. It is free to use and does not need an account.
Which CMS can it detect?
WordPress, Shopify, Wix, Squarespace, Webflow, Joomla, Drupal, Magento, PrestaShop, BigCommerce, Ghost, TYPO3 and Blogger. Other platforms are reported as “Unknown or custom CMS”.
How accurate is the result?
The tool relies on public signals, so it is a good indicator but not a guarantee. The confidence level shows how many clues agreed. Sites behind security plugins, firewalls or headless setups can be missed.
Why does it say “Unknown or custom CMS”?
The site may be custom-built, use a platform the tool does not cover, hide its platform signals, or block automated requests.
Can it tell if a site uses WooCommerce?
Yes. If a WordPress site loads WooCommerce files, the result shows “Also detected: WooCommerce”.
Can I find out which WordPress theme a site uses?
Yes. When the site runs WordPress, the result links straight to the WordPress Theme Detector.