diff --git a/copyparty/web/browser.js b/copyparty/web/browser.js
index 5b59132e..8771847a 100644
--- a/copyparty/web/browser.js
+++ b/copyparty/web/browser.js
@@ -125,6 +125,8 @@ var Ls = {
 
 		"cut_az": "upload files in alphabetical order, rather than smallest-file-first$N$Nalphabetical order can make it easier to eyeball if something went wrong on the server, but it makes uploading slightly slower on fiber / LAN",
 
+		"cut_nag": "audible alert when upload completes",
+
 		"cut_mt": "use multithreading to accelerate file hashing$N$Nthis uses web-workers and requires$Nmore RAM (up to 512 MiB extra)$N$N30% faster https, 4.5x faster http,$Nand 5.3x faster on android phones",
 
 		"cft_text": "favicon text (blank and refresh to disable)",
@@ -491,6 +493,8 @@ var Ls = {
 
 		"cut_az": "last opp filer i alfabetisk rekkefølge, istedenfor minste-fil-først$N$Nalfabetisk kan gjøre det lettere å anslå om alt gikk bra, men er bittelitt tregere på fiber / LAN",
 
+		"cut_nag": "lydvarsel når opplastning er ferdig",
+
 		"cut_mt": "raskere befaring ved å bruke hele CPU'en$N$Ndenne funksjonen anvender web-workers$Nog krever mer RAM (opptil 512 MiB ekstra)$N$N30% raskere https, 4.5x raskere http,$Nog 5.3x raskere på android-telefoner",
 
 		"cft_text": "ikontekst (blank ut og last siden på nytt for å deaktivere)",
@@ -917,6 +921,7 @@ ebi('op_cfg').innerHTML = (
 	'		<a id="u2tdate" class="tgl btn ttb" href="#" tt="' + L.cut_datechk + '">date-chk</a>\n' +
 	'		<a id="flag_en" class="tgl btn" href="#" tt="' + L.cut_flag + '">💤</a>\n' +
 	'		<a id="u2sort" class="tgl btn" href="#" tt="' + L.cut_az + '">az</a>\n' +
+	'		<a id="upnag" class="tgl btn" href="#" tt="' + L.cut_nag + '">🔔</a>\n' +
 	'		</td>\n' +
 	'	</div>\n' +
 	'</div>\n' +
diff --git a/copyparty/web/up2k.js b/copyparty/web/up2k.js
index cf7bf9cd..0e741078 100644
--- a/copyparty/web/up2k.js
+++ b/copyparty/web/up2k.js
@@ -615,6 +615,9 @@ function Donut(uc, st) {
     var r = this,
         el = null,
         psvg = null,
+        tenstrobe = null,
+        tstrober = null,
+        strobes = [],
         o = 20 * 2 * Math.PI,
         optab = QS('#ops a[data-dest="up2k"]');
 
@@ -664,11 +667,15 @@ function Donut(uc, st) {
         r.base = pos();
         optab.innerHTML = ya ? svg() : optab.getAttribute('ico');
         el = QS('#ops a .donut');
+        clearTimeout(tenstrobe);
         if (!ya) {
             favico.upd();
             wintitle();
+            if (document.visibilityState == 'hidden')
+                tenstrobe = setTimeout(enstrobe, 500); //debounce
         }
     };
+
     r.do = function () {
         if (!el)
             return;
@@ -701,6 +708,22 @@ function Donut(uc, st) {
             r.fc = 0;
         }
     };
+
+    function enstrobe() {
+        strobes = ['████████████████', '________________', '████████████████'];
+        tstrober = setInterval(strobe, 300);
+
+        // firefox may forget that filedrops are user-gestures so it can skip this:
+        if (uc.upnag && window.Notification && Notification.permission == 'granted')
+            new Notification(uc.nagtxt);
+    }
+
+    function strobe() {
+        var txt = strobes.pop();
+        wintitle(txt);
+        if (!txt)
+            clearInterval(tstrober);
+    }
 }
 
 
@@ -810,6 +833,7 @@ function up2k_init(subtle) {
     bcfg_bind(uc, 'datechk', 'u2tdate', turbolvl < 3, null, false);
     bcfg_bind(uc, 'az', 'u2sort', u2sort.indexOf('n') + 1, set_u2sort, false);
     bcfg_bind(uc, 'hashw', 'hashw', !!window.WebAssembly && (!subtle || !CHROME || MOBILE), set_hashw, false);
+    bcfg_bind(uc, 'upnag', 'upnag', false, set_upnag, false);
 
     var st = {
         "files": [],
@@ -1625,15 +1649,15 @@ function up2k_init(subtle) {
         console.log('toast', ok, ng);
 
         if (ok && ng)
-            toast.warn(t, (sr ? L.ur_sm : L.ur_um).format(ok, ng));
+            toast.warn(t, uc.nagtxt = (sr ? L.ur_sm : L.ur_um).format(ok, ng));
         else if (ok > 1)
-            toast.ok(t, (sr ? L.ur_aso : L.ur_auo).format(ok));
+            toast.ok(t, uc.nagtxt = (sr ? L.ur_aso : L.ur_auo).format(ok));
         else if (ok)
-            toast.ok(t, sr ? L.ur_1so : L.ur_1uo);
+            toast.ok(t, uc.nagtxt = sr ? L.ur_1so : L.ur_1uo);
         else if (ng > 1)
-            toast.err(t, (sr ? L.ur_asn : L.ur_aun).format(ng));
+            toast.err(t, uc.nagtxt = (sr ? L.ur_asn : L.ur_aun).format(ng));
         else if (ng)
-            toast.err(t, sr ? L.ur_1sn : L.ur_1un);
+            toast.err(t, uc.nagtxt = sr ? L.ur_1sn : L.ur_1un);
 
         timer.rm(etafun);
         timer.rm(donut.do);
@@ -2614,6 +2638,15 @@ function up2k_init(subtle) {
         }
     }
 
+    function set_upnag(en) {
+        if (!window.Notification) {
+            bcfg_set('upnag', false);
+            toast.err(10, "https only");
+        }
+        if (en && Notification.permission == 'default')
+            Notification.requestPermission();
+    }
+
     ebi('nthread_add').onclick = function (e) {
         ev(e);
         bumpthread(1);