diff --git a/www/clients.php b/www/clients.php
index 589e8d0..138ea3d 100644
--- a/www/clients.php
+++ b/www/clients.php
@@ -1,22 +1,11 @@
 <?php
 require "format.inc";
+include "credentials.inc";
+$TITLE = 'Mandanten';
+$CREDENTIALS ??= [];
+$clients = array_keys($CREDENTIALS);
 
 $format = get_fmt();
-$cred_file_name = 'credentials.txt';
-
-$clients = [];
-$names = [];
-$passwords = [];
-foreach (scandir('.clients/') as $file) {
-    if ($file === '.' || $file === '..') continue;
-    array_push($clients, $file);
-    $content = file_get_contents(".clients/$file/$cred_file_name");
-    if ($content) {
-        $creds = explode(":", explode("\n", $content)[0]);
-        $names[$file] = $creds[0];
-        $passwords[$file] = $creds[1];
-    }
-}
 
 $path = $_SERVER['PATH_INFO'];
 if ($path == '') {
@@ -36,7 +25,7 @@ if ($path == '') {
         exit();
     }
 
-    if ($format === 'text' || $format === 'html') {
+    if ($format === 'text') {
         header('Content-Type: text/plain; charset=UTF-8');
         foreach ($clients as $c)
             echo "$c\n";
@@ -52,7 +41,18 @@ if ($path == '') {
         echo "\n]}\n";
     } else if ($format === 'html') {
         header('Content-Type: text/html; charset=UTF-8');
-        // TODO
+        require "header.inc"; ?>
+    <h1>Mandanten</h1>
+    <table>
+        <thead><tr><th>Name</th></tr></thead>
+        <tbody>
+<?php foreach ($clients as $c) {
+            echo "            <tr><td><a href='clients/$c'>$c</a></td></tr>\n";
+        } ?>
+        </tbody>
+    </table>
+    <p><a href="clients?format=json">JSON-Format</a></p>
+<?php require "footer.inc";
     }
     exit();
 }
@@ -63,7 +63,9 @@ foreach ($clients as $c) {
 
     header('Content-Type: text/plain; charset=UTF-8');
 
-    if (!isset($_SERVER['PHP_AUTH_USER']) || !isset($_SERVER['PHP_AUTH_PW']) || $_SERVER['PHP_AUTH_USER'] !== $names[$c] || $_SERVER['PHP_AUTH_PW'] !== $passwords[$c]) {
+    if (!isset($_SERVER['PHP_AUTH_USER']) || !isset($_SERVER['PHP_AUTH_PW']) ||
+        !array_key_exists($_SERVER['PHP_AUTH_USER'], $CREDENTIALS[$c]) || $_SERVER['PHP_AUTH_PW'] !== $CREDENTIALS[$c][$_SERVER['PHP_AUTH_USER']])
+    {
         header('Status: 401');
         header('WWW-Authenticate: Basic realm="Elwig"');
         exit("401 Unauthorized :(\n");
@@ -77,7 +79,7 @@ foreach ($clients as $c) {
             header("Allow: GET");
             exit("405 Method Not Allowed :(\n");
         }
-        system("ls -Al .clients/$c/");
+        system("ls -Al .data/clients/$c/");
         exit();
     }
     $file = substr($path, strlen("/$c/"));
diff --git a/www/files/index.php b/www/files/index.php
index d9bd3af..c223efc 100644
--- a/www/files/index.php
+++ b/www/files/index.php
@@ -1,5 +1,6 @@
 <?php
 require "../format.inc";
+$TITLE = 'Downloads';
 
 if ($_SERVER['PATH_INFO'] !== '') {
     header('Status: 404');
@@ -37,33 +38,15 @@ if ($format === 'json') {
     }
 } else if ($format === 'html') {
     header('Content-Type: text/html; charset=UTF-8');
-?>
-<!DOCTYPE html>
-<html lang="de">
-<head>
-    <title>Downloads - Elwig - Elektronische Winzergenossenschaftsverwaltung</title>
-    <meta charset="UTF-8"/>
-    <link rel="icon" sizes="16x16 20x20 24x24 30x30 32x32 36x36 40x40 48x48 60x60 64x64 72x72 80x80 96x96 128x128 256x256" href="../res/elwig.ico"/>
-    <link rel="stylesheet" href="../res/style.css"/>
-</head>
-<body>
+    require "../header.inc"; ?>
     <h1>Downloads</h1>
     <table>
-        <thead>
-            <tr>
-                <th>Name</th>
-                <th>Größe</th>
-            </tr>
-        </thead>
+        <thead><tr><th>Name</th><th>Größe</th></tr></thead>
         <tbody>
-<?php
-foreach ($files as $name => [$size, $mtime, $ctime]) {
-    echo "            <tr><td><a href='$name'>$name</a></td><td>" . number_format($size / 1024 / 1024, 1) . " MB</td></tr>\n";
-}
-?>
+<?php foreach ($files as $name => [$size, $mtime, $ctime]) {
+        echo "            <tr><td><a href='$name'>$name</a></td><td>" . number_format($size / 1024 / 1024, 1) . " MB</td></tr>\n";
+    } ?>
         </tbody>
     </table>
-    <p><a href="?format=json">JSON-Format</a></p>
-</body>
-</html>
-<?php }
+    <p><a href="files?format=json">JSON-Format</a></p>
+<?php require "../footer.inc"; }
diff --git a/www/footer.inc b/www/footer.inc
new file mode 100644
index 0000000..308b1d0
--- /dev/null
+++ b/www/footer.inc
@@ -0,0 +1,2 @@
+</body>
+</html>
diff --git a/www/index.html b/www/header.inc
similarity index 51%
rename from www/index.html
rename to www/header.inc
index f3344b1..1d547da 100644
--- a/www/index.html
+++ b/www/header.inc
@@ -1,15 +1,10 @@
 <!DOCTYPE html>
 <html lang="de">
 <head>
-    <title>Elwig - Elektronische Winzergenossenschaftsverwaltung</title>
+    <base href="/elwig/"/>
+    <title><?php if (!empty($TITLE)) echo "$TITLE - "; ?>Elwig - Elektronische Winzergenossenschaftsverwaltung</title>
     <meta charset="UTF-8"/>
     <link rel="icon" sizes="16x16 20x20 24x24 30x30 32x32 36x36 40x40 48x48 60x60 64x64 72x72 80x80 96x96 128x128 256x256" href="res/elwig.ico"/>
     <link rel="stylesheet" href="res/style.css"/>
 </head>
 <body>
-    <h1>Elwig</h1>
-    <h2>Elektronische Winzergenossenschaftsverwaltung</h2>
-    <a href="https://git.necronda.net/winzer">Source</a>
-    <a href="files/">Downloads</a>
-</body>
-</html>
diff --git a/www/index.php b/www/index.php
new file mode 100644
index 0000000..7fb3a46
--- /dev/null
+++ b/www/index.php
@@ -0,0 +1,7 @@
+<?php require "header.inc"; ?>
+    <h1>Elwig</h1>
+    <h2>Elektronische Winzergenossenschaftsverwaltung</h2>
+    <a href="https://git.necronda.net/winzer">Source</a><br/>
+    <a href="files/">Downloads</a><br/>
+    <a href="clients">Mandanten</a>
+<?php require "footer.inc"; ?>

Name	Größe
Name	Größe
$name	" . number_format($size / 1024 / 1024, 1) . " MB
$name	" . number_format($size / 1024 / 1024, 1) . " MB