CKFinder is compatible with the following browsers, with their default settings:
- Internet Explorer 5.5+
- Firefox 1.5+
- Safari 3+
- Opera 9.5+
CKFinder requirments for PHP:
- PHP 4.3+ (including PHP 5.x and PHP 6.x).
- GD extension enabled (default on most installations) for thumbnails support.
Thumbnails are automatically disabled if this extension is missing. See http://www.php.net/gd.