---
title: CMS Detector
url: "https://pressable.com/web-tools/cms-detector/"
published: 2025-04-23
modified: 2025-04-24
author: Wayne McWilliams
---

[ Web Tools ](/web-tools/) 

# Free HTTP Headers Checker

Fetch and display a website’s HTTP response headers, helping you analyze server behavior and diagnose potential configuration issues.

 
 

 Enter Website URL:
 
 Detect CMS 

 Result:

 if (!url) { resultDiv.textContent = 'Please enter a valid URL.'; return; }

 resultDiv.textContent = 'Detecting...';

 const data = new FormData(); data.append('action', 'press\_cms\_detect'); data.append('url', url);

 fetch("https://pressable.com/wp-admin/admin-ajax.php", { method: 'POST', credentials: 'same-origin', body: data }) .then(response => response.json()) .then(response => { if (response.success) { resultDiv.textContent = response.data; } else { resultDiv.textContent = 'Error: ' + response.data; } }) .catch(() => { resultDiv.textContent = 'An error occurred.'; }); }

 document.addEventListener('DOMContentLoaded', function () { document.getElementById('press-cms-check-button').addEventListener('click', runCMSCheck); document.getElementById('press-cms-form').addEventListener('keydown', function (event) { if (event.key === 'Enter') { event.preventDefault(); runCMSCheck(); } });

 const params = new URLSearchParams(window.location.search); let prefillUrl = params.get('d');

 if (prefillUrl) { if (!/^https?:\\/\\//i.test(prefillUrl)) { prefillUrl = 'https://' + prefillUrl; } document.getElementById('press-cms-url').value = prefillUrl; runCMSCheck(); // or runRedirectCheck(); } });