diff --git a/index.html b/index.html
index c03cf59fb9787c98ab87fad3ea6cae075528b6b4..75e512f08d8d2cb95004b78f9c2241dfd86f107a 100644
--- a/index.html
+++ b/index.html
@@ -1,48 +1,50 @@
-<!doctype html>
-<html dir="ltr" lang="en-US">
-
-<head>
-  <meta charset="UTF-8" />
-  <meta name="viewport" content="height=device-height,width=device-width,initial-scale=1.0,maximum-scale=1.0,minimum-scale=1.0,user-scalable=no,minimal-ui" />
-  <meta name="apple-mobile-web-app-capable" content="yes" />
-  <meta name="apple-mobile-web-app-status-bar-style" content="translucent black" />
-  <meta name="format-detection" content="telephone=no,date=no,address=no,email=no,url=no" />
-  <link rel="stylesheet" href="style.css">
-  <title>Sort Lines</title>
-</head>
-
-<body onKeyDown="keys(event,'d')" onKeyUp="keys(event,'u')">
-  <header>
-    <nav>
-      <h1>Sort Lines</h1>
-      <a id="logo" class="cursordefault" href="/"><img src="../Simpel.png" alt="simpel icon" height="48" width="48"></a>
-      <a id="github" href="https://github.com/SimpelMe/sort-lines" target="_blank" title="watch source code">
-        <img id="github-cat" src="../github-cat-white.png" alt="github logo">
-      </a>
-    </nav>
-  </header>
-  <main>
-    <noscript>
-      <b>Warning: JavaScript had to be enabled.</b>
-      <br><br>
-    </noscript>
-    <details>
-      <summary>How to sort</summary>
-      <p>With this tool you can sort newline separated lines alphabetically.</p>
-      <p>You can either push the button "Paste, Sort &amp; Copy" where the clipboard content is used as content or fill in your lines into textarea and push the button "Sort &amp; Copy". In both cases the sorted result will be put back to clipboard.</p>
-      <p>If you set the option "output unique lines only" all lines existing more then once are deleted.</p>
-    </details>
-<div class="flex">
-  <button class="button pastesortunique" title="click: paste + sort + unique + copy to clipboard" onclick="paste()">Paste, Sort &amp; Copy [1]</button>
-  <span class="between_buttons">or</span>
-  <button class="button sortunique" title="click: sort + unique + copy to clipboard" onclick="sort_and_copy()">Sort &amp; Copy [2]</button>
-  <input id="unique" type="checkbox" name="unique" checked>
-  <label for="unique">output unique lines only</label>
-</div>
-    <textarea autofocus placeholder="fill in lines to sort here …" spellcheck="false" autocomplete="off">
-</textarea>
-  </main>
-</body>
-<script src="script.js"></script>
-
-</html>
+<!doctype html>
+<html dir="ltr" lang="en-US">
+
+<head>
+  <meta charset="UTF-8" />
+  <meta name="viewport" content="height=device-height,width=device-width,initial-scale=1.0,maximum-scale=1.0,minimum-scale=1.0,user-scalable=no,minimal-ui" />
+  <meta name="apple-mobile-web-app-capable" content="yes" />
+  <meta name="apple-mobile-web-app-status-bar-style" content="translucent black" />
+  <meta name="format-detection" content="telephone=no,date=no,address=no,email=no,url=no" />
+  <link rel="stylesheet" href="style.css">
+  <title>Sort Lines</title>
+</head>
+
+<body onKeyDown="keys(event,'d')" onKeyUp="keys(event,'u')">
+  <header>
+    <nav>
+      <h1>Sort Lines</h1>
+      <a id="logo" class="cursordefault" href="/"><img src="../Simpel.png" alt="simpel icon" height="48" width="48"></a>
+      <a id="github" href="https://github.com/SimpelMe/sort-lines" target="_blank" title="watch source code">
+        <img id="github-cat" src="../github-cat-white.png" alt="github logo">
+      </a>
+    </nav>
+  </header>
+  <main>
+    <noscript>
+      <b>Warning: JavaScript had to be enabled.</b>
+      <br><br>
+    </noscript>
+    <details>
+      <summary>How to sort</summary>
+      <p>With this tool you can sort newline separated lines alphabetically.</p>
+      <p>You can either push the button "Paste, Sort &amp; Copy" where the clipboard content is used as content or fill in your lines into textarea and push the button "Sort &amp; Copy". In both cases the sorted result will be put back to clipboard.
+      </p>
+      <p>If you set the option "output unique lines only" all lines existing more then once are deleted.</p>
+    </details>
+    <div class="flex">
+      <button class="button pastesortunique" title="click: paste + sort + unique + copy to clipboard" onclick="paste()">Paste, Sort &amp; Copy [1]</button>
+      <span class="between_buttons">or</span>
+      <button class="button sortunique" title="click: sort + unique + copy to clipboard" onclick="sort_and_copy()">Sort &amp; Copy [2]</button>
+      <div class="flexlabel">
+        <input id="unique" type="checkbox" name="unique" checked>
+        <label for="unique">output unique lines only</label>
+      </div>
+    </div>
+    <textarea autofocus placeholder="fill in lines to sort here …" spellcheck="false" autocomplete="off"></textarea>
+  </main>
+</body>
+<script src="script.js"></script>
+
+</html>