diff --git a/frontend/app/snapshots/page.tsx b/frontend/app/snapshots/page.tsx
index db5f832..e03237a 100644
--- a/frontend/app/snapshots/page.tsx
+++ b/frontend/app/snapshots/page.tsx
@@ -40,6 +40,9 @@ export default function SnapshotsPage() {
       setError(null)
       const data = await api.getSnapshots(dataset || undefined)
       setSnapshots(data)
+      // Auto-expand all top-level datasets so rows are visible by default
+      const topDs = new Set(data.map((s) => s.name.split("@")[0].split("/")[0]))
+      setExpandedDatasets(topDs)
     } catch (err) {
       setError(err instanceof Error ? err.message : "Failed to fetch snapshots")
     } finally {