Astro is a modern static site generator and web framework designed for content-focused websites, widely adopted by developers building blogs, documentation platforms, marketing sites, and portfolios who prioritize performance through minimal JavaScript delivery. AIWebsiteDetector.com identifies Astro-powered sites using a combination of 2 distinct script patterns, 3 HTML patterns, and 1 HTTP header signal — a precise fingerprint that reflects how Astro renders its component island architecture into the DOM. The HTML patterns typically surface in the markup structure and custom attributes Astro injects during its build process, while the script patterns correspond to Astro's client-side hydration modules that accompany interactive components on the page. The HTTP header signal further corroborates detection, often appearing in server or CDN response metadata associated with Astro's deployment targets such as Netlify, Vercel, and Cloudflare Pages. Astro is open-source and free to use, with hosting costs determined entirely by the chosen deployment platform, making it a common choice across a wide spectrum of project scales — from personal sites to enterprise documentation. This multi-signal detection approach gives AIWebsiteDetector.com high confidence when classifying Astro sites, as the combination of build-output HTML markers and runtime script patterns is difficult to mask without fundamentally altering Astro's default output behavior.
Detect Astro Websites — Free Tool
Enter any URL to check if it was built with Astro. Instant results, no account required.
How we detect Astro — see our methodology: AI Influence Score calculation, evidence tiers, and fingerprint signal types.
How to Detect Astro Websites
Script Patterns
2 patterns
HTML Patterns
3 patterns
HTTP Headers
1 patterns
1. Check the Page Source
Open the website in your browser, right-click, and select "View Page Source". Search for astro-specific patterns in the HTML.
2. Look for Script Files
Check the Network tab in DevTools for JavaScript files loaded from Astro 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 Astro?
You can detect if any website was built with Astro 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 Astro was used — with a confidence score.
How to detect if a website was built with Astro?
There are several ways to detect Astro: (1) View the page source and look for Astro-specific class names or script URLs, (2) Check the Network tab in DevTools for requests to Astro CDN domains, (3) Use our free tool — we check 6 detection signals automatically.
What websites are built with Astro?
Astro is used by thousands of websites worldwide. Our scanner has detected many Astro-built sites across different industries. You can scan any URL to check if it uses Astro.
How accurate is the Astro detection?
Our Astro detection engine checks 6 unique fingerprint signals, achieving high confidence results. We score each match and return a confidence percentage so you know how certain the detection is.
About Astro
Astro is a leading ai coding tool used by thousands of businesses and developers worldwide. Our detection engine can identify Astro-built websites with high confidence by analyzing multiple technical signals.
Whether you're a developer doing competitive research, a designer looking for inspiration, or just curious about how a website was built — AI Website Detector gives you instant, accurate detection.
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Detection Info
- Category
- AI Coding Tool
- Signals Used
- 6 patterns
- Accuracy
- High
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