Firebase is Google's mobile/web app development platform bundling a NoSQL real-time database (Firestore), hosting, authentication, and serverless functions — widely used by indie developers and startups, especially for apps needing real-time sync and a generous free tier. Our engine detects Firebase through 3 script patterns and 2 HTML patterns tied to the Firebase SDK's core initialization code, the same signal family that also underlies detection of Firebase's dedicated auth product. Documented at firebase.google.com.
Detect Firebase Websites — Free Tool
Enter any URL to check if it was built with Firebase. Instant results, no account required.
How we detect Firebase — see our methodology: AI Influence Score calculation, evidence tiers, and fingerprint signal types.
How to Detect Firebase Websites
Script Patterns
3 patterns
HTML Patterns
2 patterns
1. Check the Page Source
Open the website in your browser, right-click, and select "View Page Source". Search for firebase-specific patterns in the HTML.
2. Look for Script Files
Check the Network tab in DevTools for JavaScript files loaded from Firebase domains.
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 Firebase?
You can detect if any website was built with Firebase 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 Firebase was used — with a confidence score.
How to detect if a website was built with Firebase?
There are several ways to detect Firebase: (1) View the page source and look for Firebase-specific class names or script URLs, (2) Check the Network tab in DevTools for requests to Firebase CDN domains, (3) Use our free tool — we check 5 detection signals automatically.
What websites are built with Firebase?
Firebase is used by thousands of websites worldwide. Our scanner has detected many Firebase-built sites across different industries. You can scan any URL to check if it uses Firebase.
How accurate is the Firebase detection?
Our Firebase detection engine checks 5 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
- Database
- Signals Used
- 5 patterns
- Accuracy
- High
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