diff --git a/dist/nano_photos_provider2.cfg b/dist/nano_photos_provider2.cfg
index 56bb489..d98648c 100644
--- a/dist/nano_photos_provider2.cfg
+++ b/dist/nano_photos_provider2.cfg
@@ -1,5 +1,5 @@
 [config]
-fileExtensions="jpg|jpeg|png|gif"
+fileExtensions="jpg|JPG|jpeg|png|gif"
 contentFolder="nano_photos_content"
 sortOrder="asc"
 titleDescSeparator="$$"
@@ -15,6 +15,8 @@ jpegQuality=90
 blurredImageQuality=3
 allowedSizeValues=""
 ;allowedSizeValues="50|100|225|150|200|300|auto"
+thumbnailHeight="200"
+thumbnailWidth="200"
 
 [security]
 allowOrigins="*"
diff --git a/dist/thumbnailcreator.php b/dist/thumbnailcreator.php
new file mode 100755
index 0000000..b76d925
--- /dev/null
+++ b/dist/thumbnailcreator.php
@@ -0,0 +1,227 @@
+#!/usr/bin/php
+<?php
+
+require dirname(__FILE__) . '/nano_photos_provider2.encoding.php';
+
+function image_fix_orientation(&$image, &$size, $filename) {
+  $exif = exif_read_data($filename);
+  if (!empty($exif['Orientation'])) {
+    switch ($exif['Orientation']) {
+      case 3:
+        if ($image != null)
+            $image = imagerotate($image, 180, 0);
+        break;
+      case 6:
+        if ($image != null)
+          $image = imagerotate($image, -90, 0);
+        list($size[0],$size[1]) = array($size[1],$size[0]);
+        break;
+      case 8:
+        if ($image != null)
+          $image = imagerotate($image, 90, 0);
+        list($size[0],$size[1]) = array($size[1],$size[0]);
+        break;
+    }
+  }
+}
+
+$config_values = parse_ini_file( dirname(__FILE__) . '/nano_photos_provider2.cfg', true);
+
+// Loop through all files in contentFolder
+$path = realpath( dirname(__FILE__ ) . '/' .$config_values['config']['contentFolder'] );
+foreach (new RecursiveIteratorIterator(new RecursiveDirectoryIterator($path)) as $filepath)
+{
+        // Only files with extensions according to fileExtensions
+        if (preg_match("/".$config_values['config']['fileExtensions']."/iu",$filepath) and strpos($filepath, '_thumbnail') ===false) {
+            
+            $baseFolder = dirname($filepath);
+            $imageFilename = basename($filepath);
+            $thumbWidth = $config_values['thumbnails']['thumbnailWidth'];
+            $thumbHeight = $config_values['thumbnails']['thumbnailHeight'];
+            $thumbnailFilename     = pathinfo($filepath, PATHINFO_FILENAME) . "_" . $thumbWidth . "_" . $thumbHeight . "." . pathinfo($filepath, PATHINFO_EXTENSION);
+            $dominantcolorFilename = $thumbnailFilename . ".data";
+            
+            // Check if _thumbnail - Folder exists
+            if (!file_exists( $baseFolder . '/_thumbnails' )) {
+                mkdir( $baseFolder . '/_thumbnails', 0755, true );
+            }
+            
+            // Check if thumbnail exists
+            $generateThumbnail = true;
+            if (file_exists($baseFolder . '/_thumbnails/' . $thumbnailFilename)) {
+                if( filemtime($baseFolder . '/_thumbnails/' . $thumbnailFilename) > filemtime($baseFolder.'/'.$imageFilename) ) {
+                // image file is older as the thumbnail file
+                $generateThumbnail = false;
+                }
+            }
+            
+            // Check if dominantColors exists
+            $generateDominantColors = true;
+            if( file_exists($baseFolder . '/_thumbnails/' . $dominantcolorFilename)) {
+                if( filemtime($baseFolder . '/_thumbnails/' . $dominantcolorFilename) > filemtime($baseFolder.'/'.$imageFilename) ) {
+                $generateDominantColors=false;
+                }
+            }
+            else {
+            }
+            
+            // Get ImageSize
+            $size = getimagesize($filepath);
+            $orgImage = null;
+            image_fix_orientation($orgImage, $size, $filepath);
+                                
+            $width  = $size[0];
+            $height = $size[1];
+
+            if ($height == 0) {
+                echo "Image with zero height: $filepath\n";
+                continue;
+            }
+
+            $originalAspect = $width / $height;
+            $thumbAspect    = $thumbWidth / $thumbHeight;
+            
+            // Check ImageSize against MaxSize
+            $generateMaxSize = false;
+            if ( $width > $config_values['images']['maxSize'] || $height > $config_values['images']['maxSize'] ) {
+                if ( file_exists($baseFolder . '/_thumbnails/' .$imageFilename) == false ) {
+                    $generateMaxSize = true;
+                }
+            }           
+            
+            // Generate Image
+            if( $generateThumbnail == true || $generateDominantColors == true || $generateMaxSize == true ) {
+                switch ($size['mime']) {
+                    case 'image/jpeg':
+                        $orgImage = imagecreatefromjpeg($filepath);
+                        break;
+                    case 'image/gif':
+                        $orgImage = imagecreatefromgif($filepath);
+                        break;
+                    case 'image/png':
+                        $orgImage = imagecreatefrompng($filepath);
+                        break;
+                    default:
+                        return false;
+                        break;
+                }
+            }
+            image_fix_orientation($orgImage, $size, $filepath);
+            
+            // Resize Image if >MaxSize
+            if( $generateMaxSize == true ) {
+                
+                // Calc new size
+                if ( $width > $height ) {
+                    $MaxSizeWidth = $config_values['images']['maxSize'];
+                    $MaxSizeHeight = $MaxSizeWidth / $originalAspect;
+                    
+                } else {
+                    $MaxSizeHeight = $config_values['images']['maxSize'];
+                    $MaxSizeWidth = $MaxSizeHeight * $originalAspect;
+                }
+                
+                $MaxSize = imagecreatetruecolor($MaxSizeWidth, $MaxSizeHeight);
+                // Resize
+                imagecopyresampled($MaxSize, $orgImage, 0, 0, 0, 0, $MaxSizeWidth, $MaxSizeHeight, $width, $height);
+                
+                switch ($size['mime']) {
+                  case 'image/jpeg':
+                    imagejpeg($MaxSize, $baseFolder . '/_thumbnails/' . $imageFilename, $config_values['thumbnails']['jpegQuality'] );
+                    break;
+                  case 'image/gif':
+                    imagegif($MaxSize, $baseFolder . '/_thumbnails/' . $imageFilename);
+                    break;
+                  case 'image/png':
+                    imagepng($MaxSize, $baseFolder . '/_thumbnails/' . $imageFilename, 1);
+                    break;
+                }
+            }
+
+            if ( $thumbWidth != 'auto' && $thumbHeight != 'auto' ) {
+                
+                // IMAGE CROP
+                // some inspiration found in donkeyGallery (from Gix075) https://github.com/Gix075/donkeyGallery 
+                if ($originalAspect >= $thumbAspect) {
+                  // If image is wider than thumbnail (in aspect ratio sense)
+                  $newHeight = $thumbHeight;
+                  $newWidth  = $width / ($height / $thumbHeight);
+                } else {
+                  // If the thumbnail is wider than the image
+                  $newWidth  = $thumbWidth;
+                  $newHeight = $height / ($width / $thumbWidth);
+                }
+                
+                if( $generateThumbnail == true ) {
+                  $thumb = imagecreatetruecolor($thumbWidth, $thumbHeight);
+                  // Resize and crop
+                  imagecopyresampled($thumb, $orgImage,
+                        0 - ($newWidth - $thumbWidth) / 2,    // dest_x: Center the image horizontally
+                        0 - ($newHeight - $thumbHeight) / 2,  // dest-y: Center the image vertically
+                        0, 0, // src_x, src_y
+                        $newWidth, $newHeight, $width, $height);
+                }
+            
+            } else {
+                // NO IMAGE CROP
+                if( $thumbWidth == 'auto' ) {
+                  $newWidth  = $width / $height * $thumbHeight;
+                  $newHeight = $thumbHeight;
+                }
+                else {
+                  $newHeight = $height / $width * $thumbWidth;
+                  $newWidth  = $thumbWidth;
+                }
+                
+                if( $generateThumbnail == true ) {
+                  $thumb = imagecreatetruecolor($newWidth, $newHeight);
+
+                  // Resize
+                  imagecopyresampled($thumb, $orgImage, 0, 0, 0, 0, $newWidth, $newHeight, $width, $height);
+                }
+            }
+            
+            if( $generateThumbnail == true ) {
+                switch ($size['mime']) {
+                  case 'image/jpeg':
+                    imagejpeg($thumb, $baseFolder . '/_thumbnails/' . $thumbnailFilename, $config_values['thumbnails']['jpegQuality'] );
+                    break;
+                  case 'image/gif':
+                    imagegif($thumb, $baseFolder . '/_thumbnails/' . $thumbnailFilename);
+                    break;
+                  case 'image/png':
+                    imagepng($thumb, $baseFolder . '/_thumbnails/' . $thumbnailFilename, 1);
+                    break;
+                }
+            }
+            
+            
+            if( $generateDominantColors == true ) {
+                // Dominant colorS -> GIF
+                $dc3 = imagecreate($config_values['thumbnails']['blurredImageQuality'], $config_values['thumbnails']['blurredImageQuality']);
+                imagecopyresampled($dc3, $orgImage, 0, 0, 0, 0, 3, 3, $width, $height);
+                ob_start(); 
+                imagegif( $dc3 );
+                $image_data = ob_get_contents(); 
+                ob_end_clean();
+        
+                // Dominant color -> HEX RGB
+                $pixel = imagecreatetruecolor(1, 1);
+                imagecopyresampled($pixel, $orgImage, 0, 0, 0, 0, 1, 1, $width, $height);
+                $rgb = imagecolorat($pixel, 0, 0);
+                $color = imagecolorsforindex($pixel, $rgb);
+                $hex=sprintf('#%02x%02x%02x', $color['red'], $color['green'], $color['blue']);
+                                
+                // save to cache
+                $fdc = fopen($baseFolder . '/_thumbnails/' . $thumbnailFilename . '.data', 'w');
+                if( $fdc ) { 
+                    fwrite($fdc, 'dc=' . $hex . "\n");
+                    fwrite($fdc, 'dcGIF=' . base64_encode( $image_data ));
+                    fclose($fdc);
+                }
+                else {
+                }
+            }
+        }
+}
+?>