htmx is a small JavaScript library that lets developers add AJAX, WebSockets, and dynamic page updates using HTML attributes instead of writing JavaScript — popular with developers building server-rendered apps (Python, Ruby, Go, PHP) who want SPA-like interactivity without a front-end framework. Our engine detects htmx through 2 script patterns tied to its runtime bundle and 1 HTML pattern matching its signature `hx-*` attributes, which are distinctive enough to make false positives rare. htmx is a lightweight open-source library, not a hosting platform, so detection reflects a front-end dependency choice on an otherwise custom-built site. Documented at htmx.org.
Detect HTMX Websites — Free Tool
Enter any URL to check if it was built with HTMX. Instant results, no account required.
How we detect HTMX — see our methodology: AI Influence Score calculation, evidence tiers, and fingerprint signal types.
How to Detect HTMX Websites
Script Patterns
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 htmx-specific patterns in the HTML.
2. Look for Script Files
Check the Network tab in DevTools for JavaScript files loaded from HTMX 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 HTMX?
You can detect if any website was built with HTMX 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 HTMX was used — with a confidence score.
How to detect if a website was built with HTMX?
There are several ways to detect HTMX: (1) View the page source and look for HTMX-specific class names or script URLs, (2) Check the Network tab in DevTools for requests to HTMX CDN domains, (3) Use our free tool — we check 3 detection signals automatically.
What websites are built with HTMX?
HTMX is used by thousands of websites worldwide. Our scanner has detected many HTMX-built sites across different industries. You can scan any URL to check if it uses HTMX.
How accurate is the HTMX detection?
Our HTMX 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.
Rate this Builder
No ratings yet — be the first!
Detection Info
- Category
- JavaScript Framework
- Signals Used
- 3 patterns
- Accuracy
- High
Recently Analyzed HTMX Websites
User Reviews
No reviews yet. Be the first to review HTMX.