Is This Website Built With Classic ASP?

How to Tell if a Website Uses Classic ASP

Identifying whether a website was built with Classic ASP used to require technical expertise — inspecting source code, tracing network requests in DevTools, and knowing which patterns to look for. Our free scanner automates all of that: it fetches the page, analyzes 1 Classic ASP-specific signals, and returns a verdict with a confidence score.

You might want to detect Classic ASP for competitive research, due diligence before acquiring a site, or simple curiosity. Whatever the reason, this page covers every method — automated and manual.

What is Classic ASP?

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.

It is primarily used for business websites, portfolios, landing pages, and personal sites without coding knowledge.

Visit Classic ASP official website

How to Manually Detect Classic ASP Websites

Method 1 — View Page Source

Open the website in your browser
Press Ctrl+U (Windows) or Cmd+Option+U (Mac)
Search (Ctrl+F) for classic-asp or classicasp
If found in script src, class names, or meta tags — it's likely Classic ASP

Method 2 — Browser DevTools Network Tab

Press F12 to open DevTools
Click the Network tab and reload the page
Filter by classic in the search box
If you see requests to Classic ASP-specific domains, it's confirmed

Faster: Skip the manual steps — paste the URL into our scanner above and we check all 1 signals in seconds.

How Our Classic ASP Detector Works

When you submit a URL, our engine fetches the page from its server — just like a browser would — then analyzes the response across 1 Classic ASP-specific fingerprints:

Script analysis

We scan all loaded JavaScript files for known CDN paths and runtime names

CDN domain matching

We cross-reference every asset request against known platform CDNs

HTML pattern scanning

We search the DOM for platform-specific class names and data attributes

Header inspection

We read HTTP response headers that identify the server or platform

Meta tag extraction

We check generator and other meta tags in the document head

Confidence scoring

We weight each matched signal and normalize to a 0–99% score

How to Build a Similar Website With Classic ASP

Sign up at https://learn.microsoft.com/en-us/previous-versions/iis/6.0-sdk/ms524929(v=vs.90), pick a template, customize it with the drag-and-drop editor, add your content, and publish. Most website builders offer free plans to get started.

Other popular website builders include Wix, Squarespace, Webflow, Carrd, and Showit.

Get started with Classic ASP

Frequently Asked Questions

How can I tell if a website was built with Classic ASP?

The most reliable ways to detect Classic ASP are: (1) open DevTools → Network tab and look for requests to Classic ASP-specific CDN domains, (2) view page source and search for Classic ASP-specific class names or data attributes, (3) use our free scanner — we check 1 detection signals automatically and return a confidence score.

Is your Classic ASP detector free?

Yes, completely free. Paste any URL into our scanner and we'll analyze it for Classic ASP fingerprints immediately. No account required, no limits on scans.

How accurate is the Classic ASP detection?

We check 1 unique Classic ASP fingerprint signals across HTML, JavaScript, CDN domains, meta tags, and HTTP headers. Our confidence score reflects how many signals matched — a score above 70% is a strong indicator. We cap accuracy at 99% to reflect that all fingerprint-based detection is probabilistic.

Can Classic ASP sites be detected if they use a custom domain?

Yes. Custom domains don't hide the underlying platform. The JavaScript files, CDN requests, HTML attributes, and server headers all remain identifiable regardless of the domain name used. Our scanner fetches the page directly and analyzes its technical composition.

What should I do after detecting a Classic ASP website?

If you want to build something similar, visit https://learn.microsoft.com/en-us/previous-versions/iis/6.0-sdk/ms524929(v=vs.90) to learn more or sign up. If you're doing competitive research, our scan result also shows the full technology stack — including hosting platform, domain age, and other detected technologies. You can share the result link with your team.