Yii is a high-performance PHP framework used for web applications and admin back ends. AIWebsiteDetector reports Yii from the assets its asset manager publishes (`yii.js`, `yii.activeForm.js` under `/assets/<hash>/`), its CSRF form field (`YII_CSRF_TOKEN`, `_csrf-frontend`, `_csrf-backend`) and the matching cookies. Yii applications that load none of these front-end assets leave no passive trace, so a missing result does not mean the site is not Yii.
Detect Yii Websites — Free Tool
Enter any URL to check if it was built with Yii. Instant results, no account required.
How we detect Yii — see our methodology: AI Influence Score calculation, evidence tiers, and fingerprint signal types.
How to Detect Yii Websites
Script Patterns
2 patterns
HTML Patterns
1 patterns
Cookies
2 patterns
1. Check the Page Source
Open the website in your browser, right-click, and select "View Page Source". Search for yii-specific patterns in the HTML.
2. Look for Script Files
Check the Network tab in DevTools for JavaScript files loaded from Yii 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 Yii?
You can detect if any website was built with Yii 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 Yii was used — with a confidence score.
How to detect if a website was built with Yii?
There are several ways to detect Yii: (1) View the page source and look for Yii-specific class names or script URLs, (2) Check the Network tab in DevTools for requests to Yii CDN domains, (3) Use our free tool — we check 3 detection signals automatically.
What websites are built with Yii?
Yii is used by thousands of websites worldwide. Our scanner has detected many Yii-built sites across different industries. You can scan any URL to check if it uses Yii.
How accurate is the Yii detection?
Our Yii 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
- PHP Framework
- Signals Used
- 3 patterns
- Accuracy
- High
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