diff --git a/Thumbnailer.go b/Thumbnailer.go
index 913c7ee..043b067 100644
--- a/Thumbnailer.go
+++ b/Thumbnailer.go
@@ -49,6 +49,15 @@ func (this *Thumbnailer) RenderFile(absPath string) ([]byte, error) {
 	return thumb.([]byte), nil
 }
 
+func FiletypeSupported(ext string) bool {
+	switch strings.ToLower(ext) {
+	case ".jpg", ".jpeg", ".png", ".gif", ".avi", ".mkv", ".mp4", ".ogm", ".wmv":
+		return true
+	default:
+		return false
+	}
+}
+
 func (this *Thumbnailer) RenderFile_NoCache(absPath string) ([]byte, error) {
 
 	fh, err := os.OpenFile(absPath, os.O_RDONLY, 0400)