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Is This Website Built With Auth0?

Paste any URL below. Our scanner checks 6 Auth0-specific fingerprints — scripts, CDN domains, HTML attributes, and HTTP headers — and returns a confidence score instantly.

How to Tell if a Website Uses Auth0

Identifying whether a website was built with Auth0 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 6 Auth0-specific signals, and returns a verdict with a confidence score.

You might want to detect Auth0 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 Auth0?

Auth0 is a Auth Provider used to build websites and web applications.

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

Visit Auth0 official website

Signs a Website Is Built With Auth0

Our detection engine checks 6 unique Auth0 fingerprints. Here are the most reliable signals:

High Confidence

CDN Domain

Assets (images, scripts, fonts) are loaded from Auth0-specific CDN domains. This is one of the most reliable signals because CDN domains are hard to hide.

auth0.com
High Confidence

JavaScript / Script Files

Auth0 loads specific JavaScript runtime files or loads scripts from identifiable URLs. Checking script src attributes reveals the platform.

cdn.auth0.comauth0-spa-jsauth0.js
Medium Confidence

HTML Attributes & Class Names

Auth0 injects proprietary class names, data attributes, or markup patterns into the page HTML that are unique to the platform.

auth0.WebAuthauth0.createClient

How to Manually Detect Auth0 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 auth0 or auth0
  4. If found in script src, class names, or meta tags — it's likely Auth0

Method 2 — Browser DevTools Network Tab

  1. Press F12 to open DevTools
  2. Click the Network tab and reload the page
  3. Filter by auth0 in the search box
  4. If you see requests to Auth0-specific domains, it's confirmed
Faster: Skip the manual steps — paste the URL into our scanner above and we check all 6 signals in seconds.

How Our Auth0 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 6 Auth0-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 Auth0

Sign up at https://auth0.com, 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 Auth0

Frequently Asked Questions

How can I tell if a website was built with Auth0?

The most reliable ways to detect Auth0 are: (1) open DevTools → Network tab and look for requests to Auth0-specific CDN domains, (2) view page source and search for Auth0-specific class names or data attributes, (3) use our free scanner — we check 6 detection signals automatically and return a confidence score.

Is your Auth0 detector free?

Yes, completely free. Paste any URL into our scanner and we'll analyze it for Auth0 fingerprints immediately. No account required, no limits on scans.

How accurate is the Auth0 detection?

We check 6 unique Auth0 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 Auth0 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 Auth0 website?

If you want to build something similar, visit https://auth0.com 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.