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.
Paste any URL to instantly detect whether it was built with Yii. Our engine checks 3 technical signals.
Yii is used across many industries. These are the most common website types built on this platform:
Businesses of all sizes
Fast, reliable site building with professional results
Designers and developers
Powerful tools with minimal setup
Startups
Quick launch with scalable infrastructure
Content creators
Beautiful presentation for your work
Every Yii website leaves distinctive technical fingerprints. Here's what to look for:
JavaScript Patterns
2 script patterns linked to Yii
HTML Attributes
1 HTML pattern in the page source
Explore how Yii compares to similar php framework tools: