diff --git a/task_handlers.go b/task_handlers.go
index f9fddf7..8decd3f 100644
--- a/task_handlers.go
+++ b/task_handlers.go
@@ -71,10 +71,7 @@ func newListActiveTasksHandlerFunc(inspector *asynq.Inspector, pf PayloadFormatt
 			Tasks: activeTasks,
 			Stats: toQueueStateSnapshot(qinfo),
 		}
-		if err := json.NewEncoder(w).Encode(resp); err != nil {
-			http.Error(w, err.Error(), http.StatusInternalServerError)
-			return
-		}
+		writeResponseJSON(w, resp)
 	}
 }
 
@@ -149,10 +146,7 @@ func newBatchCancelActiveTasksHandlerFunc(inspector *asynq.Inspector) http.Handl
 				resp.CanceledIDs = append(resp.CanceledIDs, id)
 			}
 		}
-		if err := json.NewEncoder(w).Encode(resp); err != nil {
-			http.Error(w, err.Error(), http.StatusInternalServerError)
-			return
-		}
+		writeResponseJSON(w, resp)
 	}
 }
 
@@ -180,10 +174,7 @@ func newListPendingTasksHandlerFunc(inspector *asynq.Inspector, pf PayloadFormat
 			payload["tasks"] = toPendingTasks(tasks, pf)
 		}
 		payload["stats"] = toQueueStateSnapshot(qinfo)
-		if err := json.NewEncoder(w).Encode(payload); err != nil {
-			http.Error(w, err.Error(), http.StatusInternalServerError)
-			return
-		}
+		writeResponseJSON(w, payload)
 	}
 }
 
@@ -211,10 +202,7 @@ func newListScheduledTasksHandlerFunc(inspector *asynq.Inspector, pf PayloadForm
 			payload["tasks"] = toScheduledTasks(tasks, pf)
 		}
 		payload["stats"] = toQueueStateSnapshot(qinfo)
-		if err := json.NewEncoder(w).Encode(payload); err != nil {
-			http.Error(w, err.Error(), http.StatusInternalServerError)
-			return
-		}
+		writeResponseJSON(w, payload)
 	}
 }
 
@@ -242,10 +230,7 @@ func newListRetryTasksHandlerFunc(inspector *asynq.Inspector, pf PayloadFormatte
 			payload["tasks"] = toRetryTasks(tasks, pf)
 		}
 		payload["stats"] = toQueueStateSnapshot(qinfo)
-		if err := json.NewEncoder(w).Encode(payload); err != nil {
-			http.Error(w, err.Error(), http.StatusInternalServerError)
-			return
-		}
+		writeResponseJSON(w, payload)
 	}
 }
 
@@ -273,10 +258,7 @@ func newListArchivedTasksHandlerFunc(inspector *asynq.Inspector, pf PayloadForma
 			payload["tasks"] = toArchivedTasks(tasks, pf)
 		}
 		payload["stats"] = toQueueStateSnapshot(qinfo)
-		if err := json.NewEncoder(w).Encode(payload); err != nil {
-			http.Error(w, err.Error(), http.StatusInternalServerError)
-			return
-		}
+		writeResponseJSON(w, payload)
 	}
 }
 
@@ -303,10 +285,7 @@ func newListCompletedTasksHandlerFunc(inspector *asynq.Inspector, pf PayloadForm
 			payload["tasks"] = toCompletedTasks(tasks, pf, rf)
 		}
 		payload["stats"] = toQueueStateSnapshot(qinfo)
-		if err := json.NewEncoder(w).Encode(payload); err != nil {
-			http.Error(w, err.Error(), http.StatusInternalServerError)
-			return
-		}
+		writeResponseJSON(w, payload)
 	}
 }
 
@@ -335,10 +314,7 @@ func newListAggregatingTasksHandlerFunc(inspector *asynq.Inspector, pf PayloadFo
 			payload["tasks"] = toAggregatingTasks(tasks, pf)
 		}
 		payload["stats"] = toQueueStateSnapshot(qinfo)
-		if err := json.NewEncoder(w).Encode(payload); err != nil {
-			http.Error(w, err.Error(), http.StatusInternalServerError)
-			return
-		}
+		writeResponseJSON(w, payload)
 	}
 }
 
@@ -406,11 +382,7 @@ func newDeleteAllPendingTasksHandlerFunc(inspector *asynq.Inspector) http.Handle
 			http.Error(w, err.Error(), http.StatusInternalServerError)
 			return
 		}
-		resp := deleteAllTasksResponse{n}
-		if err := json.NewEncoder(w).Encode(resp); err != nil {
-			http.Error(w, err.Error(), http.StatusInternalServerError)
-			return
-		}
+		writeResponseJSON(w, deleteAllTasksResponse{n})
 	}
 }
 
@@ -423,11 +395,7 @@ func newDeleteAllAggregatingTasksHandlerFunc(inspector *asynq.Inspector) http.Ha
 			http.Error(w, err.Error(), http.StatusInternalServerError)
 			return
 		}
-		resp := deleteAllTasksResponse{n}
-		if err := json.NewEncoder(w).Encode(resp); err != nil {
-			http.Error(w, err.Error(), http.StatusInternalServerError)
-			return
-		}
+		writeResponseJSON(w, deleteAllTasksResponse{n})
 	}
 }
 
@@ -439,11 +407,7 @@ func newDeleteAllScheduledTasksHandlerFunc(inspector *asynq.Inspector) http.Hand
 			http.Error(w, err.Error(), http.StatusInternalServerError)
 			return
 		}
-		resp := deleteAllTasksResponse{n}
-		if err := json.NewEncoder(w).Encode(resp); err != nil {
-			http.Error(w, err.Error(), http.StatusInternalServerError)
-			return
-		}
+		writeResponseJSON(w, deleteAllTasksResponse{n})
 	}
 }
 
@@ -455,11 +419,7 @@ func newDeleteAllRetryTasksHandlerFunc(inspector *asynq.Inspector) http.HandlerF
 			http.Error(w, err.Error(), http.StatusInternalServerError)
 			return
 		}
-		resp := deleteAllTasksResponse{n}
-		if err := json.NewEncoder(w).Encode(resp); err != nil {
-			http.Error(w, err.Error(), http.StatusInternalServerError)
-			return
-		}
+		writeResponseJSON(w, deleteAllTasksResponse{n})
 	}
 }
 
@@ -471,11 +431,7 @@ func newDeleteAllArchivedTasksHandlerFunc(inspector *asynq.Inspector) http.Handl
 			http.Error(w, err.Error(), http.StatusInternalServerError)
 			return
 		}
-		resp := deleteAllTasksResponse{n}
-		if err := json.NewEncoder(w).Encode(resp); err != nil {
-			http.Error(w, err.Error(), http.StatusInternalServerError)
-			return
-		}
+		writeResponseJSON(w, deleteAllTasksResponse{n})
 	}
 }
 
@@ -487,44 +443,48 @@ func newDeleteAllCompletedTasksHandlerFunc(inspector *asynq.Inspector) http.Hand
 			http.Error(w, err.Error(), http.StatusInternalServerError)
 			return
 		}
-		resp := deleteAllTasksResponse{n}
-		if err := json.NewEncoder(w).Encode(resp); err != nil {
-			http.Error(w, err.Error(), http.StatusInternalServerError)
-			return
-		}
+		writeResponseJSON(w, deleteAllTasksResponse{n})
 	}
 }
 
+type runAllTasksResponse struct {
+	// Number of tasks scheduled to run.
+	Scheduled int `json:"scheduled"`
+}
+
 func newRunAllScheduledTasksHandlerFunc(inspector *asynq.Inspector) http.HandlerFunc {
 	return func(w http.ResponseWriter, r *http.Request) {
 		qname := mux.Vars(r)["qname"]
-		if _, err := inspector.RunAllScheduledTasks(qname); err != nil {
+		n, err := inspector.RunAllScheduledTasks(qname)
+		if err != nil {
 			http.Error(w, err.Error(), http.StatusInternalServerError)
 			return
 		}
-		w.WriteHeader(http.StatusNoContent)
+		writeResponseJSON(w, runAllTasksResponse{n})
 	}
 }
 
 func newRunAllRetryTasksHandlerFunc(inspector *asynq.Inspector) http.HandlerFunc {
 	return func(w http.ResponseWriter, r *http.Request) {
 		qname := mux.Vars(r)["qname"]
-		if _, err := inspector.RunAllRetryTasks(qname); err != nil {
+		n, err := inspector.RunAllRetryTasks(qname)
+		if err != nil {
 			http.Error(w, err.Error(), http.StatusInternalServerError)
 			return
 		}
-		w.WriteHeader(http.StatusNoContent)
+		writeResponseJSON(w, runAllTasksResponse{n})
 	}
 }
 
 func newRunAllArchivedTasksHandlerFunc(inspector *asynq.Inspector) http.HandlerFunc {
 	return func(w http.ResponseWriter, r *http.Request) {
 		qname := mux.Vars(r)["qname"]
-		if _, err := inspector.RunAllArchivedTasks(qname); err != nil {
+		n, err := inspector.RunAllArchivedTasks(qname)
+		if err != nil {
 			http.Error(w, err.Error(), http.StatusInternalServerError)
 			return
 		}
-		w.WriteHeader(http.StatusNoContent)
+		writeResponseJSON(w, runAllTasksResponse{n})
 	}
 }
 
@@ -532,22 +492,35 @@ func newRunAllAggregatingTasksHandlerFunc(inspector *asynq.Inspector) http.Handl
 	return func(w http.ResponseWriter, r *http.Request) {
 		vars := mux.Vars(r)
 		qname, gname := vars["qname"], vars["gname"]
-		if _, err := inspector.RunAllAggregatingTasks(qname, gname); err != nil {
+		n, err := inspector.RunAllAggregatingTasks(qname, gname)
+		if err != nil {
 			http.Error(w, err.Error(), http.StatusInternalServerError)
 			return
 		}
-		w.WriteHeader(http.StatusNoContent)
+		writeResponseJSON(w, runAllTasksResponse{n})
+	}
+}
+
+type archiveAllTasksResponse struct {
+	// Number of tasks archived.
+	Archived int `json:"archived"`
+}
+
+func writeResponseJSON(w http.ResponseWriter, resp interface{}) {
+	if err := json.NewEncoder(w).Encode(resp); err != nil {
+		http.Error(w, err.Error(), http.StatusInternalServerError)
 	}
 }
 
 func newArchiveAllPendingTasksHandlerFunc(inspector *asynq.Inspector) http.HandlerFunc {
 	return func(w http.ResponseWriter, r *http.Request) {
 		qname := mux.Vars(r)["qname"]
-		if _, err := inspector.ArchiveAllPendingTasks(qname); err != nil {
+		n, err := inspector.ArchiveAllPendingTasks(qname)
+		if err != nil {
 			http.Error(w, err.Error(), http.StatusInternalServerError)
 			return
 		}
-		w.WriteHeader(http.StatusNoContent)
+		writeResponseJSON(w, archiveAllTasksResponse{n})
 	}
 }
 
@@ -555,33 +528,36 @@ func newArchiveAllAggregatingTasksHandlerFunc(inspector *asynq.Inspector) http.H
 	return func(w http.ResponseWriter, r *http.Request) {
 		vars := mux.Vars(r)
 		qname, gname := vars["qname"], vars["gname"]
-		if _, err := inspector.ArchiveAllAggregatingTasks(qname, gname); err != nil {
+		n, err := inspector.ArchiveAllAggregatingTasks(qname, gname)
+		if err != nil {
 			http.Error(w, err.Error(), http.StatusInternalServerError)
 			return
 		}
-		w.WriteHeader(http.StatusNoContent)
+		writeResponseJSON(w, archiveAllTasksResponse{n})
 	}
 }
 
 func newArchiveAllScheduledTasksHandlerFunc(inspector *asynq.Inspector) http.HandlerFunc {
 	return func(w http.ResponseWriter, r *http.Request) {
 		qname := mux.Vars(r)["qname"]
-		if _, err := inspector.ArchiveAllScheduledTasks(qname); err != nil {
+		n, err := inspector.ArchiveAllScheduledTasks(qname)
+		if err != nil {
 			http.Error(w, err.Error(), http.StatusInternalServerError)
 			return
 		}
-		w.WriteHeader(http.StatusNoContent)
+		writeResponseJSON(w, archiveAllTasksResponse{n})
 	}
 }
 
 func newArchiveAllRetryTasksHandlerFunc(inspector *asynq.Inspector) http.HandlerFunc {
 	return func(w http.ResponseWriter, r *http.Request) {
 		qname := mux.Vars(r)["qname"]
-		if _, err := inspector.ArchiveAllRetryTasks(qname); err != nil {
+		n, err := inspector.ArchiveAllRetryTasks(qname)
+		if err != nil {
 			http.Error(w, err.Error(), http.StatusInternalServerError)
 			return
 		}
-		w.WriteHeader(http.StatusNoContent)
+		writeResponseJSON(w, archiveAllTasksResponse{n})
 	}
 }
 
@@ -632,10 +608,7 @@ func newBatchDeleteTasksHandlerFunc(inspector *asynq.Inspector) http.HandlerFunc
 				resp.DeletedIDs = append(resp.DeletedIDs, taskid)
 			}
 		}
-		if err := json.NewEncoder(w).Encode(resp); err != nil {
-			http.Error(w, err.Error(), http.StatusInternalServerError)
-			return
-		}
+		writeResponseJSON(w, resp)
 	}
 }
 
@@ -676,10 +649,7 @@ func newBatchRunTasksHandlerFunc(inspector *asynq.Inspector) http.HandlerFunc {
 				resp.PendingIDs = append(resp.PendingIDs, taskid)
 			}
 		}
-		if err := json.NewEncoder(w).Encode(resp); err != nil {
-			http.Error(w, err.Error(), http.StatusInternalServerError)
-			return
-		}
+		writeResponseJSON(w, resp)
 	}
 }
 
@@ -720,10 +690,7 @@ func newBatchArchiveTasksHandlerFunc(inspector *asynq.Inspector) http.HandlerFun
 				resp.ArchivedIDs = append(resp.ArchivedIDs, taskid)
 			}
 		}
-		if err := json.NewEncoder(w).Encode(resp); err != nil {
-			http.Error(w, err.Error(), http.StatusInternalServerError)
-			return
-		}
+		writeResponseJSON(w, resp)
 	}
 }
 
@@ -769,9 +736,6 @@ func newGetTaskHandlerFunc(inspector *asynq.Inspector, pf PayloadFormatter, rf R
 			return
 		}
 
-		if err := json.NewEncoder(w).Encode(toTaskInfo(info, pf, rf)); err != nil {
-			http.Error(w, err.Error(), http.StatusInternalServerError)
-			return
-		}
+		writeResponseJSON(w, toTaskInfo(info, pf, rf))
 	}
 }