<!DOCTYPE html>
    <html>
        <head>
            <meta charset="utf-8">
            <title>CKEditor</title>
    <script src="//cdn.ckeditor.com/4.5.5/standard/ckeditor.js"></script>
        </head>
        <body>
            <textarea name="editor1"></textarea>
            <script>
                CKEDITOR.replace( 'editor1' );
            </script>
        </body>
    </html>