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Is This Website Built With Keystone CMS?

Paste any URL below. Our scanner checks 2 Keystone CMS-specific fingerprints — scripts, CDN domains, HTML attributes, and HTTP headers — and returns a confidence score instantly.

How to Tell if a Website Uses Keystone CMS

Identifying whether a website was built with Keystone CMS 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 2 Keystone CMS-specific signals, and returns a verdict with a confidence score.

You might want to detect Keystone CMS 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 Keystone CMS?

Keystone is a powerful GraphQL CMS and backend for Node.js.

It is primarily used for content-driven websites, blogs, news sites, documentation, and publishing platforms.

Signs a Website Is Built With Keystone CMS

Our detection engine checks 2 unique Keystone CMS fingerprints. Here are the most reliable signals:

High Confidence

HTTP Response Headers

Keystone CMS-hosted sites respond with specific HTTP headers that identify the platform or infrastructure. These are visible in DevTools → Network tab.

x-powered-by
Medium Confidence

HTML Attributes & Class Names

Keystone CMS injects proprietary class names, data attributes, or markup patterns into the page HTML that are unique to the platform.

keystone

How to Manually Detect Keystone CMS Websites

Method 1 — View Page Source

  1. Open the website in your browser
  2. Press Ctrl+U (Windows) or Cmd+Option+U (Mac)
  3. Search (Ctrl+F) for keystone-cms or keystonecms
  4. If found in script src, class names, or meta tags — it's likely Keystone CMS

Method 2 — Browser DevTools Network Tab

  1. Press F12 to open DevTools
  2. Click the Network tab and reload the page
  3. Filter by keystone in the search box
  4. If you see requests to Keystone CMS-specific domains, it's confirmed
Faster: Skip the manual steps — paste the URL into our scanner above and we check all 2 signals in seconds.

How Our Keystone CMS 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 2 Keystone CMS-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 Keystone CMS

Install Keystone CMS from the official website, set up your content models, and connect a frontend framework like Next.js or Gatsby to display your content.

Other popular CMS platforms include WordPress, Ghost, Contentful, Sanity, and Strapi.

Frequently Asked Questions

How can I tell if a website was built with Keystone CMS?

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

Is your Keystone CMS detector free?

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

How accurate is the Keystone CMS detection?

We check 2 unique Keystone CMS 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 Keystone CMS 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 Keystone CMS website?

If you want to build something similar, visit the Keystone CMS website 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.