Amazon S3 (Simple Storage Service) is AWS's object storage product, used across the web to host static assets, images, and file uploads — it's infrastructure rather than a website builder, so its presence typically indicates a custom-built or self-hosted site storing media on AWS rather than a local server or a different CDN. Our engine detects S3 usage through 1 HTML pattern and 2 CDN domain signatures matching S3's characteristic bucket-URL and `amazonaws.com` hosting patterns referenced in asset URLs. Documented at aws.amazon.com/s3.
Detect AWS S3 Websites — Free Tool
Enter any URL to check if it was built with AWS S3. Instant results, no account required.
How we detect AWS S3 — see our methodology: AI Influence Score calculation, evidence tiers, and fingerprint signal types.
How to Detect AWS S3 Websites
CDN Domains
2 patterns
HTML Patterns
1 patterns
1. Check the Page Source
Open the website in your browser, right-click, and select "View Page Source". Search for aws s3-specific patterns in the HTML.
3. Check CDN Domains
Network requests to these CDN domains indicate a AWS S3 site:
s3\.amazonaws\.com\.s3\.[a-z0-9-]+\.amazonaws\.com4. 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 AWS S3?
You can detect if any website was built with AWS S3 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 AWS S3 was used — with a confidence score.
How to detect if a website was built with AWS S3?
There are several ways to detect AWS S3: (1) View the page source and look for AWS S3-specific class names or script URLs, (2) Check the Network tab in DevTools for requests to AWS S3 CDN domains, (3) Use our free tool — we check 3 detection signals automatically.
What websites are built with AWS S3?
AWS S3 is used by thousands of websites worldwide. Our scanner has detected many AWS S3-built sites across different industries. You can scan any URL to check if it uses AWS S3.
How accurate is the AWS S3 detection?
Our AWS S3 detection engine checks 3 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
- Storage
- Signals Used
- 3 patterns
- Accuracy
- High
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