Các công cụ tiện ích online
<ul>
 	<li><a href="https://stackjava.com/crypt3-online">Demo Crypt3</a></li>
 	<li><a href="https://stackjava.com/decode-jwt">Decode JWT</a></li>
 	<li><a href="https://stackjava.com/swagger-editor">Swagger</a></li>
</ul>