Content Security Policy (CSP) is not a product but an HTTP security header standard that lets a site restrict which sources scripts, styles, and other resources may load from, reducing the risk of XSS attacks. Our engine detects a configured CSP through 1 HTTP header check and 1 meta-tag pattern (`Content-Security-Policy`, delivered either as a response header or an equivalent `<meta>` tag). Its presence in our results is a security-posture signal, not a builder or vendor identification. Reference: MDN's CSP documentation.
Detect Content Security Policy Websites — Free Tool
Enter any URL to check if it was built with Content Security Policy. Instant results, no account required.
How we detect Content Security Policy — see our methodology: AI Influence Score calculation, evidence tiers, and fingerprint signal types.
How to Detect Content Security Policy Websites
HTTP Headers
1 patterns
Meta Tags
1 patterns
1. Check the Page Source
Open the website in your browser, right-click, and select "View Page Source". Search for content security policy-specific patterns in the HTML.
4. Use AI Website Detector (Easiest)
Our automated scanner checks all these signals at once and gives you an instant confidence score. Just enter any URL above.
Frequently Asked Questions
Is this website built with Content Security Policy?
You can detect if any website was built with Content Security Policy by using our free scanner above. Just enter the URL and we'll analyze HTML patterns, JavaScript files, CDN domains, and HTTP headers to determine if Content Security Policy was used — with a confidence score.
How to detect if a website was built with Content Security Policy?
There are several ways to detect Content Security Policy: (1) View the page source and look for Content Security Policy-specific class names or script URLs, (2) Check the Network tab in DevTools for requests to Content Security Policy CDN domains, (3) Use our free tool — we check 1 detection signals automatically.
What websites are built with Content Security Policy?
Content Security Policy is used by thousands of websites worldwide. Our scanner has detected many Content Security Policy-built sites across different industries. You can scan any URL to check if it uses Content Security Policy.
How accurate is the Content Security Policy detection?
Our Content Security Policy detection engine checks 1 unique fingerprint signals, achieving high confidence results. We score each match and return a confidence percentage so you know how certain the detection is.
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Detection Info
- Category
- Security
- Signals Used
- 1 patterns
- Accuracy
- High
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