diff --git a/templates/index.html b/templates/index.html
index d58b3dc..9051da5 100644
--- a/templates/index.html
+++ b/templates/index.html
@@ -452,8 +452,8 @@
   }
 
   function start(f) {
-    var OKEXT = /\.(epub|html?|txt|log|md|markdown|csv|tsv|json|xml|svg|png|jpe?g|webp)$/i;
-    if (!OKEXT.test(f.name)) { flashError('Unsupported file type — accepted: .epub .html .md .txt .log .csv .tsv .json .xml .svg .png .jpg .webp'); return; }
+    var OKEXT = /\.(epub|html|htm|txt|log|md|markdown|csv|tsv|json|xml|svg|png|jpe?g|webp|tiff|bmp|pdf|docx|odt|rtf|tex|latex|org|adoc|rst)$/i;
+    if (!OKEXT.test(f.name)) { flashError('Unsupported file type — accepted: .epub .html .htm .txt .log .md .markdown .csv .tsv .json .xml .svg .png .jpg .jpeg .webp .tiff .bmp .pdf .docx .odt .rtf .tex .latex .org .adoc .rst'); return; }
     var form = new FormData();
     form.append('file', f);
     showStatus();