Add explanation.

index.php

@@ -35,6 +35,11 @@ if(isset($_POST['input']) && isset($_POST['type'])) {
 		<h1>Hash Online</h1>
 		<h5 class="text-muted">Hash SHA1, SHA256, MD5 and more online</h5>
 
+        <p>I wanted to make my own hashing website that was secured using SSL. I was using
+            <a href="http://sha1-online.com" target="_blank">sha1-online.com</a> for a long time but decided to stop
+            using it because it is still using HTTP and create my own which is using HTTPS instead. You can check the
+            source out over at my GitLab server. <a href="https://git.zsinfo.nl/Zandor300/hash-online" target="_blank">Repository</a></p>
+
 		<form method="post" action="/" class="mt-5">
 
 			<input type="text" class="form-control" name="input" id="input" placeholder="Your input">