diff --git a/backend/internal/handler/instance_detail.go b/backend/internal/handler/instance_detail.go
index b3715b7..94c5c3c 100644
--- a/backend/internal/handler/instance_detail.go
+++ b/backend/internal/handler/instance_detail.go
@@ -105,14 +105,15 @@ func DetailListTables(c *gin.Context) {
 			ptrValues[i] = &values[i]
 		}
 		rows.Scan(ptrValues...)
+		// Normalize to lowercase keys for frontend compatibility
 		rowMap := make(map[string]interface{})
 		for i, col := range cols {
 			val := values[i]
 			b, ok := val.([]byte)
 			if ok {
-				rowMap[col] = string(b)
+				rowMap[strings.ToLower(col)] = string(b)
 			} else {
-				rowMap[col] = val
+				rowMap[strings.ToLower(col)] = val
 			}
 		}
 		tables = append(tables, rowMap)