Classic ASP is Microsoft's original server-side scripting technology (`.asp` pages on IIS), before ASP.NET. It is still found on older business sites. AIWebsiteDetector reports it from an `X-Powered-By: ASP` header (distinct from `ASP.NET`), the `ASPSESSIONID…` session cookie and relative `.asp` links. A site that hides these cannot be identified from outside.
Detect Classic ASP Websites — Free Tool
Enter any URL to check if it was built with Classic ASP. Instant results, no account required.
How we detect Classic ASP — see our methodology: AI Influence Score calculation, evidence tiers, and fingerprint signal types.
How to Detect Classic ASP Websites
HTTP Headers
1 patterns
Cookies
1 patterns
1. Check the Page Source
Open the website in your browser, right-click, and select "View Page Source". Search for classic asp-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 Classic ASP?
You can detect if any website was built with Classic ASP 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 Classic ASP was used — with a confidence score.
How to detect if a website was built with Classic ASP?
There are several ways to detect Classic ASP: (1) View the page source and look for Classic ASP-specific class names or script URLs, (2) Check the Network tab in DevTools for requests to Classic ASP CDN domains, (3) Use our free tool — we check 1 detection signals automatically.
What websites are built with Classic ASP?
Classic ASP is used by thousands of websites worldwide. Our scanner has detected many Classic ASP-built sites across different industries. You can scan any URL to check if it uses Classic ASP.
How accurate is the Classic ASP detection?
Our Classic ASP 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
- Backend Framework
- Signals Used
- 1 patterns
- Accuracy
- High
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