diff --git a/tinyfilemanager.php b/tinyfilemanager.php
index da0f403..b636a71 100644
--- a/tinyfilemanager.php
+++ b/tinyfilemanager.php
@@ -2113,7 +2113,7 @@ $tableTheme = (FM_THEME == "dark") ? "text-white bg-dark table-dark" : "bg-white
                         <td><?php echo fm_enc($owner['name'] . ':' . $group['name']) ?></td>
                     <?php endif; ?>
                     <td class="inline-actions">
-                        <a title="<?php echo lng('Preview') ?>" href="<?php echo $filelink.'&quickView=1'; ?>" data-toggle="lightbox" data-gallery="tiny-gallery" data-title="<?php echo fm_convert_win(fm_enc($f)) ?>" data-max-width="100%" data-width="100%"><i class="fa fa-eye"></i></a>
+                        <a title="<?php echo lng('Preview') ?>" href="<?php echo $filelink.'&quickView=1'; ?>" data-toggle="lightbox" data-ext="<?php echo pathinfo($f, PATHINFO_EXTENSION) ?>" data-gallery="tiny-gallery" data-title="<?php echo fm_convert_win(fm_enc($f)) ?>" data-max-width="100%" data-width="100%"><i class="fa fa-eye"></i></a>
                         <?php if (!FM_READONLY): ?>
                             <a title="<?php echo lng('Delete') ?>" href="?p=<?php echo urlencode(FM_PATH) ?>&amp;del=<?php echo urlencode($f) ?>" onclick="return confirm('<?php echo lng('Delete').' '.lng('File').'?'; ?>\n \n ( <?php echo urlencode($f) ?> )');"> <i class="fa fa-trash-o"></i></a>
                             <a title="<?php echo lng('Rename') ?>" href="#" onclick="rename('<?php echo fm_enc(addslashes(FM_PATH)) ?>', '<?php echo fm_enc(addslashes($f)) ?>');return false;"><i class="fa fa-pencil-square-o"></i></a>
@@ -3838,12 +3838,17 @@ $isStickyNavBar = $sticky_navbar ? 'navbar-fixed' : 'navbar-normal';
 <script src="https://cdnjs.cloudflare.com/ajax/libs/ekko-lightbox/5.3.0/ekko-lightbox.min.js"></script>
 <?php if (FM_USE_HIGHLIGHTJS): ?>
     <script src="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/10.6.0/highlight.min.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/marked/marked.min.js"></script>
     <script>hljs.highlightAll(); var isHighlightingEnabled = true;</script>
 <?php endif; ?>
 <script>
     $(document).on('click', '[data-toggle="lightbox"]', function(event) {
-        event.preventDefault();
-        var reInitHighlight = function() { if(typeof isHighlightingEnabled !== "undefined" && isHighlightingEnabled) { setTimeout(function () { $('.ekko-lightbox-container pre code').each(function (i, e) { hljs.highlightBlock(e) }); }, 555); } };
+        var reInitHighlight;
+        if ($(this)[0].dataset.ext == 'md' || $(this)[0].dataset.ext == 'markdown') {
+            reInitHighlight = function() { if(typeof isHighlightingEnabled !== "undefined" && isHighlightingEnabled) { setTimeout(function () { var md; $('.ekko-lightbox-container pre code').each(function (i, e) { md = e.innerHTML; $(e).parent().replaceWith(document.createElement("md")) }); $('.ekko-lightbox-container md').each(function (i, e) { $(e).html(marked.parse(md).replace(/&lt;u&gt;(.*)&lt;\/u&gt;/gim, '<u>$1</u>')) }); }, 555); } };
+        } else {
+            reInitHighlight = function() { if(typeof isHighlightingEnabled !== "undefined" && isHighlightingEnabled) { setTimeout(function () { $('.ekko-lightbox-container pre code').each(function (i, e) { hljs.highlightBlock(e) }); }, 555); } };
+        }
         $(this).ekkoLightbox({
             alwaysShowClose: true, showArrows: true, onShown: function() { reInitHighlight(); }, onNavigate: function(direction, itemIndex) { reInitHighlight(); }
         });