diff --git a/frontend/templates/index.html b/frontend/templates/index.html
index b006d78..b90ee5f 100644
--- a/frontend/templates/index.html
+++ b/frontend/templates/index.html
@@ -218,7 +218,10 @@ async function handleDownload(formData) {
         let label = 'Downloading source file... ' + gb + ' GiB';
         if (pdata.speed_mbps) label += ' (' + pdata.speed_mbps + ' MB/s)';
         if (pdata.eta) label += ' — ' + pdata.eta;
-        setPhase(label, 0, true);
+        // Show percentage if we know total size
+        const totalGb = pdata.content_length_gb;
+        const pct = totalGb ? Math.round((pdata.file_size_gb / totalGb) * 100) : 0;
+        setPhase(label, pct, totalGb ? false : true);
       }
     } catch (_) { /* keep polling */ }
   }