diff --git a/copyparty/web/browser.js b/copyparty/web/browser.js
index 55a9ec93..8022b79b 100644
--- a/copyparty/web/browser.js
+++ b/copyparty/web/browser.js
@@ -2644,6 +2644,8 @@ var fileman = (function () {
 				if (!md.hasOwnProperty(k))
 					continue;
 
+				md[k] = (md[k] + '').replace(/[\/\\]/g, '-');
+
 				if (k.startsWith('.'))
 					md[k.slice(1)] = md[k];
 			}