diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6fe7c78..cb3dad8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Added
+
+- `DeleteAllPendingTasks`, `ArchiveAllPendingTasks` were added to `Inspector`
+- `DeleteTaskByKey` and `ArchiveTaskByKey` now supports deleting/archiving `PendingTask`.
+- asynq CLI now supports deleting/archiving pending tasks.
+
 ## [0.14.1] - 2021-01-19
 
 ### Fixed
diff --git a/inspector.go b/inspector.go
index be1675a..04243aa 100644
--- a/inspector.go
+++ b/inspector.go
@@ -217,41 +217,62 @@ type ArchivedTask struct {
 	score int64
 }
 
-// Key returns a key used to delete, run, and archive the task.
+// Format string used for task key.
+// Format is <prefix>:<uuid>:<score>.
+const taskKeyFormat = "%s:%v:%v"
+
+// Prefix used for task key.
+const (
+	keyPrefixPending   = "p"
+	keyPrefixScheduled = "s"
+	keyPrefixRetry     = "r"
+	keyPrefixArchived  = "a"
+
+	allKeyPrefixes = keyPrefixPending + keyPrefixScheduled + keyPrefixRetry + keyPrefixArchived
+)
+
+// Key returns a key used to delete, and archive the pending task.
+func (t *PendingTask) Key() string {
+	// Note: Pending tasks are stored in redis LIST, therefore no score.
+	// Use zero for the score to use the same key format.
+	return fmt.Sprintf(taskKeyFormat, keyPrefixPending, t.ID, 0)
+}
+
+// Key returns a key used to delete, run, and archive the scheduled task.
 func (t *ScheduledTask) Key() string {
-	return fmt.Sprintf("s:%v:%v", t.ID, t.score)
+	return fmt.Sprintf(taskKeyFormat, keyPrefixScheduled, t.ID, t.score)
 }
 
-// Key returns a key used to delete, run, and archive the task.
+// Key returns a key used to delete, run, and archive the retry task.
 func (t *RetryTask) Key() string {
-	return fmt.Sprintf("r:%v:%v", t.ID, t.score)
+	return fmt.Sprintf(taskKeyFormat, keyPrefixRetry, t.ID, t.score)
 }
 
-// Key returns a key used to delete, run, and archive the task.
+// Key returns a key used to delete and run the archived task.
 func (t *ArchivedTask) Key() string {
-	return fmt.Sprintf("a:%v:%v", t.ID, t.score)
+	return fmt.Sprintf(taskKeyFormat, keyPrefixArchived, t.ID, t.score)
 }
 
 // parseTaskKey parses a key string and returns each part of key with proper
 // type if valid, otherwise it reports an error.
-func parseTaskKey(key string) (id uuid.UUID, score int64, state string, err error) {
+func parseTaskKey(key string) (prefix string, id uuid.UUID, score int64, err error) {
 	parts := strings.Split(key, ":")
 	if len(parts) != 3 {
-		return uuid.Nil, 0, "", fmt.Errorf("invalid id")
+		return "", uuid.Nil, 0, fmt.Errorf("invalid id")
 	}
 	id, err = uuid.Parse(parts[1])
 	if err != nil {
-		return uuid.Nil, 0, "", fmt.Errorf("invalid id")
+		return "", uuid.Nil, 0, fmt.Errorf("invalid id")
 	}
 	score, err = strconv.ParseInt(parts[2], 10, 64)
 	if err != nil {
-		return uuid.Nil, 0, "", fmt.Errorf("invalid id")
+		return "", uuid.Nil, 0, fmt.Errorf("invalid id")
 	}
-	state = parts[0]
-	if len(state) != 1 || !strings.Contains("sra", state) {
-		return uuid.Nil, 0, "", fmt.Errorf("invalid id")
+	prefix = parts[0]
+	if len(prefix) != 1 || !strings.Contains(allKeyPrefixes, prefix) {
+		return "", uuid.Nil, 0, fmt.Errorf("invalid id")
 	}
-	return id, score, state, nil
+	return prefix, id, score, nil
 }
 
 // ListOption specifies behavior of list operation.
@@ -457,6 +478,16 @@ func (i *Inspector) ListArchivedTasks(qname string, opts ...ListOption) ([]*Arch
 	return tasks, nil
 }
 
+// DeleteAllPendingTasks deletes all pending tasks from the specified queue,
+// and reports the number tasks deleted.
+func (i *Inspector) DeleteAllPendingTasks(qname string) (int, error) {
+	if err := validateQueueName(qname); err != nil {
+		return 0, err
+	}
+	n, err := i.rdb.DeleteAllPendingTasks(qname)
+	return int(n), err
+}
+
 // DeleteAllScheduledTasks deletes all scheduled tasks from the specified queue,
 // and reports the number tasks deleted.
 func (i *Inspector) DeleteAllScheduledTasks(qname string) (int, error) {
@@ -492,23 +523,25 @@ func (i *Inspector) DeleteTaskByKey(qname, key string) error {
 	if err := validateQueueName(qname); err != nil {
 		return err
 	}
-	id, score, state, err := parseTaskKey(key)
+	prefix, id, score, err := parseTaskKey(key)
 	if err != nil {
 		return err
 	}
-	switch state {
-	case "s":
+	switch prefix {
+	case keyPrefixPending:
+		return i.rdb.DeletePendingTask(qname, id)
+	case keyPrefixScheduled:
 		return i.rdb.DeleteScheduledTask(qname, id, score)
-	case "r":
+	case keyPrefixRetry:
 		return i.rdb.DeleteRetryTask(qname, id, score)
-	case "a":
+	case keyPrefixArchived:
 		return i.rdb.DeleteArchivedTask(qname, id, score)
 	default:
 		return fmt.Errorf("invalid key")
 	}
 }
 
-// RunAllScheduledTasks transition all scheduled tasks to pending state within the given queue,
+// RunAllScheduledTasks transition all scheduled tasks to pending state from the given queue,
 // and reports the number of tasks transitioned.
 func (i *Inspector) RunAllScheduledTasks(qname string) (int, error) {
 	if err := validateQueueName(qname); err != nil {
@@ -518,7 +551,7 @@ func (i *Inspector) RunAllScheduledTasks(qname string) (int, error) {
 	return int(n), err
 }
 
-// RunAllRetryTasks transition all retry tasks to pending state within the given queue,
+// RunAllRetryTasks transition all retry tasks to pending state from the given queue,
 // and reports the number of tasks transitioned.
 func (i *Inspector) RunAllRetryTasks(qname string) (int, error) {
 	if err := validateQueueName(qname); err != nil {
@@ -528,7 +561,7 @@ func (i *Inspector) RunAllRetryTasks(qname string) (int, error) {
 	return int(n), err
 }
 
-// RunAllArchivedTasks transition all archived tasks to pending state within the given queue,
+// RunAllArchivedTasks transition all archived tasks to pending state from the given queue,
 // and reports the number of tasks transitioned.
 func (i *Inspector) RunAllArchivedTasks(qname string) (int, error) {
 	if err := validateQueueName(qname); err != nil {
@@ -543,23 +576,35 @@ func (i *Inspector) RunTaskByKey(qname, key string) error {
 	if err := validateQueueName(qname); err != nil {
 		return err
 	}
-	id, score, state, err := parseTaskKey(key)
+	prefix, id, score, err := parseTaskKey(key)
 	if err != nil {
 		return err
 	}
-	switch state {
-	case "s":
+	switch prefix {
+	case keyPrefixScheduled:
 		return i.rdb.RunScheduledTask(qname, id, score)
-	case "r":
+	case keyPrefixRetry:
 		return i.rdb.RunRetryTask(qname, id, score)
-	case "a":
+	case keyPrefixArchived:
 		return i.rdb.RunArchivedTask(qname, id, score)
+	case keyPrefixPending:
+		return fmt.Errorf("task is already pending for run")
 	default:
 		return fmt.Errorf("invalid key")
 	}
 }
 
-// ArchiveAllScheduledTasks archives all scheduled tasks within the given queue,
+// ArchiveAllPendingTasks archives all pending tasks from the given queue,
+// and reports the number of tasks archived.
+func (i *Inspector) ArchiveAllPendingTasks(qname string) (int, error) {
+	if err := validateQueueName(qname); err != nil {
+		return 0, err
+	}
+	n, err := i.rdb.ArchiveAllPendingTasks(qname)
+	return int(n), err
+}
+
+// ArchiveAllScheduledTasks archives all scheduled tasks from the given queue,
 // and reports the number of tasks archiveed.
 func (i *Inspector) ArchiveAllScheduledTasks(qname string) (int, error) {
 	if err := validateQueueName(qname); err != nil {
@@ -569,7 +614,7 @@ func (i *Inspector) ArchiveAllScheduledTasks(qname string) (int, error) {
 	return int(n), err
 }
 
-// ArchiveAllRetryTasks archives all retry tasks within the given queue,
+// ArchiveAllRetryTasks archives all retry tasks from the given queue,
 // and reports the number of tasks archiveed.
 func (i *Inspector) ArchiveAllRetryTasks(qname string) (int, error) {
 	if err := validateQueueName(qname); err != nil {
@@ -584,17 +629,19 @@ func (i *Inspector) ArchiveTaskByKey(qname, key string) error {
 	if err := validateQueueName(qname); err != nil {
 		return err
 	}
-	id, score, state, err := parseTaskKey(key)
+	prefix, id, score, err := parseTaskKey(key)
 	if err != nil {
 		return err
 	}
-	switch state {
-	case "s":
+	switch prefix {
+	case keyPrefixPending:
+		return i.rdb.ArchivePendingTask(qname, id)
+	case keyPrefixScheduled:
 		return i.rdb.ArchiveScheduledTask(qname, id, score)
-	case "r":
+	case keyPrefixRetry:
 		return i.rdb.ArchiveRetryTask(qname, id, score)
-	case "a":
-		return fmt.Errorf("task already archived")
+	case keyPrefixArchived:
+		return fmt.Errorf("task is already archived")
 	default:
 		return fmt.Errorf("invalid key")
 	}
diff --git a/inspector_test.go b/inspector_test.go
index 19c117a..e3c7270 100644
--- a/inspector_test.go
+++ b/inspector_test.go
@@ -839,6 +839,70 @@ func TestInspectorListPagination(t *testing.T) {
 	}
 }
 
+func TestInspectorDeleteAllPendingTasks(t *testing.T) {
+	r := setup(t)
+	defer r.Close()
+	m1 := asynqtest.NewTaskMessage("task1", nil)
+	m2 := asynqtest.NewTaskMessage("task2", nil)
+	m3 := asynqtest.NewTaskMessage("task3", nil)
+	m4 := asynqtest.NewTaskMessageWithQueue("task3", nil, "custom")
+
+	inspector := NewInspector(getRedisConnOpt(t))
+
+	tests := []struct {
+		pending     map[string][]*base.TaskMessage
+		qname       string
+		want        int
+		wantPending map[string][]*base.TaskMessage
+	}{
+		{
+			pending: map[string][]*base.TaskMessage{
+				"default": {m1, m2, m3},
+				"custom":  {m4},
+			},
+			qname: "default",
+			want:  3,
+			wantPending: map[string][]*base.TaskMessage{
+				"default": {},
+				"custom":  {m4},
+			},
+		},
+		{
+			pending: map[string][]*base.TaskMessage{
+				"default": {m1, m2, m3},
+				"custom":  {m4},
+			},
+			qname: "custom",
+			want:  1,
+			wantPending: map[string][]*base.TaskMessage{
+				"default": {m1, m2, m3},
+				"custom":  {},
+			},
+		},
+	}
+
+	for _, tc := range tests {
+		asynqtest.FlushDB(t, r)
+		asynqtest.SeedAllPendingQueues(t, r, tc.pending)
+
+		got, err := inspector.DeleteAllPendingTasks(tc.qname)
+		if err != nil {
+			t.Errorf("DeleteAllPendingTasks(%q) returned error: %v", tc.qname, err)
+			continue
+		}
+		if got != tc.want {
+			t.Errorf("DeleteAllPendingTasks(%q) = %d, want %d", tc.qname, got, tc.want)
+		}
+
+		for qname, want := range tc.wantPending {
+			gotPending := asynqtest.GetPendingMessages(t, r, qname)
+			if diff := cmp.Diff(want, gotPending, asynqtest.SortMsgOpt); diff != "" {
+				t.Errorf("unexpected pending tasks in queue %q: (-want, +got)\n%s", qname, diff)
+			}
+		}
+	}
+}
+
 func TestInspectorDeleteAllScheduledTasks(t *testing.T) {
 	r := setup(t)
 	defer r.Close()
@@ -1037,7 +1101,122 @@ func TestInspectorDeleteAllArchivedTasks(t *testing.T) {
 	}
 }
 
-func TestInspectorKillAllScheduledTasks(t *testing.T) {
+func TestInspectorArchiveAllPendingTasks(t *testing.T) {
+	r := setup(t)
+	defer r.Close()
+	m1 := asynqtest.NewTaskMessage("task1", nil)
+	m2 := asynqtest.NewTaskMessage("task2", nil)
+	m3 := asynqtest.NewTaskMessage("task3", nil)
+	m4 := asynqtest.NewTaskMessageWithQueue("task4", nil, "custom")
+	now := time.Now()
+	z1 := base.Z{Message: m1, Score: now.Add(5 * time.Minute).Unix()}
+	z2 := base.Z{Message: m2, Score: now.Add(15 * time.Minute).Unix()}
+	inspector := NewInspector(getRedisConnOpt(t))
+
+	tests := []struct {
+		pending      map[string][]*base.TaskMessage
+		archived     map[string][]base.Z
+		qname        string
+		want         int
+		wantPending  map[string][]*base.TaskMessage
+		wantArchived map[string][]base.Z
+	}{
+		{
+			pending: map[string][]*base.TaskMessage{
+				"default": {m1, m2, m3},
+				"custom":  {m4},
+			},
+			archived: map[string][]base.Z{
+				"default": {},
+				"custom":  {},
+			},
+			qname: "default",
+			want:  3,
+			wantPending: map[string][]*base.TaskMessage{
+				"default": {},
+				"custom":  {m4},
+			},
+			wantArchived: map[string][]base.Z{
+				"default": {
+					base.Z{Message: m1, Score: now.Unix()},
+					base.Z{Message: m2, Score: now.Unix()},
+					base.Z{Message: m3, Score: now.Unix()},
+				},
+				"custom": {},
+			},
+		},
+		{
+			pending: map[string][]*base.TaskMessage{
+				"default": {},
+			},
+			archived: map[string][]base.Z{
+				"default": {},
+			},
+			qname: "default",
+			want:  0,
+			wantPending: map[string][]*base.TaskMessage{
+				"default": {},
+			},
+			wantArchived: map[string][]base.Z{
+				"default": {},
+			},
+		},
+		{
+			pending: map[string][]*base.TaskMessage{
+				"default": {m3, m4},
+			},
+			archived: map[string][]base.Z{
+				"default": {z1, z2},
+			},
+			qname: "default",
+			want:  2,
+			wantPending: map[string][]*base.TaskMessage{
+				"default": {},
+			},
+			wantArchived: map[string][]base.Z{
+				"default": {
+					z1,
+					z2,
+					base.Z{Message: m3, Score: now.Unix()},
+					base.Z{Message: m4, Score: now.Unix()},
+				},
+			},
+		},
+	}
+
+	for _, tc := range tests {
+		asynqtest.FlushDB(t, r)
+		asynqtest.SeedAllPendingQueues(t, r, tc.pending)
+		asynqtest.SeedAllArchivedQueues(t, r, tc.archived)
+
+		got, err := inspector.ArchiveAllPendingTasks(tc.qname)
+		if err != nil {
+			t.Errorf("ArchiveAllPendingTasks(%q) returned error: %v", tc.qname, err)
+			continue
+		}
+		if got != tc.want {
+			t.Errorf("ArchiveAllPendingTasks(%q) = %d, want %d", tc.qname, got, tc.want)
+		}
+		for qname, want := range tc.wantPending {
+			gotPending := asynqtest.GetPendingMessages(t, r, qname)
+			if diff := cmp.Diff(want, gotPending, asynqtest.SortMsgOpt); diff != "" {
+				t.Errorf("unexpected pending tasks in queue %q: (-want, +got)\n%s", qname, diff)
+			}
+		}
+		for qname, want := range tc.wantArchived {
+			// Allow Z.Score to differ by up to 2.
+			approxOpt := cmp.Comparer(func(a, b int64) bool {
+				return math.Abs(float64(a-b)) < 2
+			})
+			gotArchived := asynqtest.GetArchivedEntries(t, r, qname)
+			if diff := cmp.Diff(want, gotArchived, asynqtest.SortZSetEntryOpt, approxOpt); diff != "" {
+				t.Errorf("unexpected archived tasks in queue %q: (-want, +got)\n%s", qname, diff)
+			}
+		}
+	}
+}
+
+func TestInspectorArchiveAllScheduledTasks(t *testing.T) {
 	r := setup(t)
 	defer r.Close()
 	m1 := asynqtest.NewTaskMessage("task1", nil)
@@ -1145,11 +1324,11 @@ func TestInspectorKillAllScheduledTasks(t *testing.T) {
 
 		got, err := inspector.ArchiveAllScheduledTasks(tc.qname)
 		if err != nil {
-			t.Errorf("KillAllScheduledTasks(%q) returned error: %v", tc.qname, err)
+			t.Errorf("ArchiveAllScheduledTasks(%q) returned error: %v", tc.qname, err)
 			continue
 		}
 		if got != tc.want {
-			t.Errorf("KillAllScheduledTasks(%q) = %d, want %d", tc.qname, got, tc.want)
+			t.Errorf("ArchiveAllScheduledTasks(%q) = %d, want %d", tc.qname, got, tc.want)
 		}
 		for qname, want := range tc.wantScheduled {
 			gotScheduled := asynqtest.GetScheduledEntries(t, r, qname)
@@ -1170,7 +1349,7 @@ func TestInspectorKillAllScheduledTasks(t *testing.T) {
 	}
 }
 
-func TestInspectorKillAllRetryTasks(t *testing.T) {
+func TestInspectorArchiveAllRetryTasks(t *testing.T) {
 	r := setup(t)
 	defer r.Close()
 	m1 := asynqtest.NewTaskMessage("task1", nil)
@@ -1262,11 +1441,11 @@ func TestInspectorKillAllRetryTasks(t *testing.T) {
 
 		got, err := inspector.ArchiveAllRetryTasks(tc.qname)
 		if err != nil {
-			t.Errorf("KillAllRetryTasks(%q) returned error: %v", tc.qname, err)
+			t.Errorf("ArchiveAllRetryTasks(%q) returned error: %v", tc.qname, err)
 			continue
 		}
 		if got != tc.want {
-			t.Errorf("KillAllRetryTasks(%q) = %d, want %d", tc.qname, got, tc.want)
+			t.Errorf("ArchiveAllRetryTasks(%q) = %d, want %d", tc.qname, got, tc.want)
 		}
 		for qname, want := range tc.wantRetry {
 			gotRetry := asynqtest.GetRetryEntries(t, r, qname)
@@ -1632,6 +1811,67 @@ func TestInspectorRunAllArchivedTasks(t *testing.T) {
 	}
 }
 
+func TestInspectorDeleteTaskByKeyDeletesPendingTask(t *testing.T) {
+	r := setup(t)
+	defer r.Close()
+	m1 := asynqtest.NewTaskMessage("task1", nil)
+	m2 := asynqtest.NewTaskMessage("task2", nil)
+	m3 := asynqtest.NewTaskMessageWithQueue("task3", nil, "custom")
+	inspector := NewInspector(getRedisConnOpt(t))
+
+	tests := []struct {
+		pending     map[string][]*base.TaskMessage
+		qname       string
+		key         string
+		wantPending map[string][]*base.TaskMessage
+	}{
+		{
+			pending: map[string][]*base.TaskMessage{
+				"default": {m1, m2},
+				"custom":  {m3},
+			},
+			qname: "default",
+			key:   createPendingTask(m2).Key(),
+			wantPending: map[string][]*base.TaskMessage{
+				"default": {m1},
+				"custom":  {m3},
+			},
+		},
+		{
+			pending: map[string][]*base.TaskMessage{
+				"default": {m1, m2},
+				"custom":  {m3},
+			},
+			qname: "custom",
+			key:   createPendingTask(m3).Key(),
+			wantPending: map[string][]*base.TaskMessage{
+				"default": {m1, m2},
+				"custom":  {},
+			},
+		},
+	}
+
+	for _, tc := range tests {
+		asynqtest.FlushDB(t, r)
+		asynqtest.SeedAllPendingQueues(t, r, tc.pending)
+
+		if err := inspector.DeleteTaskByKey(tc.qname, tc.key); err != nil {
+			t.Errorf("DeleteTaskByKey(%q, %q) returned error: %v",
+				tc.qname, tc.key, err)
+			continue
+		}
+
+		for qname, want := range tc.wantPending {
+			got := asynqtest.GetPendingMessages(t, r, qname)
+			if diff := cmp.Diff(want, got, asynqtest.SortMsgOpt); diff != "" {
+				t.Errorf("unspected pending tasks in queue %q: (-want,+got):\n%s",
+					qname, diff)
+				continue
+			}
+		}
+	}
+}
+
 func TestInspectorDeleteTaskByKeyDeletesScheduledTask(t *testing.T) {
 	r := setup(t)
 	defer r.Close()
@@ -1994,7 +2234,98 @@ func TestInspectorRunTaskByKeyRunsArchivedTask(t *testing.T) {
 	}
 }
 
-func TestInspectorKillTaskByKeyKillsScheduledTask(t *testing.T) {
+func TestInspectorArchiveTaskByKeyArchivesPendingTask(t *testing.T) {
+	r := setup(t)
+	defer r.Close()
+	m1 := asynqtest.NewTaskMessage("task1", nil)
+	m2 := asynqtest.NewTaskMessageWithQueue("task2", nil, "custom")
+	m3 := asynqtest.NewTaskMessageWithQueue("task3", nil, "custom")
+	inspector := NewInspector(getRedisConnOpt(t))
+	now := time.Now()
+
+	tests := []struct {
+		pending      map[string][]*base.TaskMessage
+		archived     map[string][]base.Z
+		qname        string
+		key          string
+		wantPending  map[string][]*base.TaskMessage
+		wantArchived map[string][]base.Z
+	}{
+		{
+			pending: map[string][]*base.TaskMessage{
+				"default": {m1},
+				"custom":  {m2, m3},
+			},
+			archived: map[string][]base.Z{
+				"default": {},
+				"custom":  {},
+			},
+			qname: "default",
+			key:   createPendingTask(m1).Key(),
+			wantPending: map[string][]*base.TaskMessage{
+				"default": {},
+				"custom":  {m2, m3},
+			},
+			wantArchived: map[string][]base.Z{
+				"default": {
+					{Message: m1, Score: now.Unix()},
+				},
+				"custom": {},
+			},
+		},
+		{
+			pending: map[string][]*base.TaskMessage{
+				"default": {m1},
+				"custom":  {m2, m3},
+			},
+			archived: map[string][]base.Z{
+				"default": {},
+				"custom":  {},
+			},
+			qname: "custom",
+			key:   createPendingTask(m2).Key(),
+			wantPending: map[string][]*base.TaskMessage{
+				"default": {m1},
+				"custom":  {m3},
+			},
+			wantArchived: map[string][]base.Z{
+				"default": {},
+				"custom": {
+					{Message: m2, Score: now.Unix()},
+				},
+			},
+		},
+	}
+
+	for _, tc := range tests {
+		asynqtest.FlushDB(t, r)
+		asynqtest.SeedAllPendingQueues(t, r, tc.pending)
+		asynqtest.SeedAllArchivedQueues(t, r, tc.archived)
+
+		if err := inspector.ArchiveTaskByKey(tc.qname, tc.key); err != nil {
+			t.Errorf("ArchiveTaskByKey(%q, %q) returned error: %v",
+				tc.qname, tc.key, err)
+			continue
+		}
+		for qname, want := range tc.wantPending {
+			gotPending := asynqtest.GetPendingMessages(t, r, qname)
+			if diff := cmp.Diff(want, gotPending, asynqtest.SortMsgOpt); diff != "" {
+				t.Errorf("unexpected pending tasks in queue %q: (-want,+got)\n%s",
+					qname, diff)
+			}
+
+		}
+		for qname, want := range tc.wantArchived {
+			wantArchived := asynqtest.GetArchivedEntries(t, r, qname)
+			if diff := cmp.Diff(want, wantArchived, asynqtest.SortZSetEntryOpt); diff != "" {
+				t.Errorf("unexpected archived tasks in queue %q: (-want,+got)\n%s",
+					qname, diff)
+			}
+		}
+	}
+}
+
+func TestInspectorArchiveTaskByKeyArchivesScheduledTask(t *testing.T) {
 	r := setup(t)
 	defer r.Close()
 	m1 := asynqtest.NewTaskMessage("task1", nil)
@@ -2049,7 +2380,7 @@ func TestInspectorKillTaskByKeyKillsScheduledTask(t *testing.T) {
 		asynqtest.SeedAllArchivedQueues(t, r, tc.archived)
 
 		if err := inspector.ArchiveTaskByKey(tc.qname, tc.key); err != nil {
-			t.Errorf("KillTaskByKey(%q, %q) returned error: %v", tc.qname, tc.key, err)
+			t.Errorf("ArchiveTaskByKey(%q, %q) returned error: %v", tc.qname, tc.key, err)
 			continue
 		}
 		for qname, want := range tc.wantScheduled {
@@ -2070,7 +2401,7 @@ func TestInspectorKillTaskByKeyKillsScheduledTask(t *testing.T) {
 	}
 }
 
-func TestInspectorKillTaskByKeyKillsRetryTask(t *testing.T) {
+func TestInspectorArchiveTaskByKeyArchivesRetryTask(t *testing.T) {
 	r := setup(t)
 	defer r.Close()
 	m1 := asynqtest.NewTaskMessage("task1", nil)
@@ -2124,7 +2455,7 @@ func TestInspectorKillTaskByKeyKillsRetryTask(t *testing.T) {
 		asynqtest.SeedAllArchivedQueues(t, r, tc.archived)
 
 		if err := inspector.ArchiveTaskByKey(tc.qname, tc.key); err != nil {
-			t.Errorf("KillTaskByKey(%q, %q) returned error: %v", tc.qname, tc.key, err)
+			t.Errorf("ArchiveTaskByKey(%q, %q) returned error: %v", tc.qname, tc.key, err)
 			continue
 		}
 		for qname, want := range tc.wantRetry {
diff --git a/internal/rdb/inspect.go b/internal/rdb/inspect.go
index a3298d1..deca68c 100644
--- a/internal/rdb/inspect.go
+++ b/internal/rdb/inspect.go
@@ -488,6 +488,66 @@ func (r *RDB) ArchiveScheduledTask(qname string, id uuid.UUID, score int64) erro
 	return nil
 }
 
+// KEYS[1] -> asynq:{<qname>}
+// KEYS[2] -> asynq:{<qname>}:archived
+// ARGV[1] -> task message to archive
+// ARGV[2] -> current timestamp
+// ARGV[3] -> cutoff timestamp (e.g., 90 days ago)
+// ARGV[4] -> max number of tasks in archive (e.g., 100)
+var archivePendingCmd = redis.NewScript(`
+local x = redis.call("LREM", KEYS[1], 1, ARGV[1])
+if x == 0 then
+	return 0
+end
+redis.call("ZADD", KEYS[2], ARGV[2], ARGV[1])
+redis.call("ZREMRANGEBYSCORE", KEYS[2], "-inf", ARGV[3])
+redis.call("ZREMRANGEBYRANK", KEYS[2], 0, -ARGV[4])
+return 1
+`)
+
+func (r *RDB) archivePending(qname, msg string) (int64, error) {
+	keys := []string{base.QueueKey(qname), base.ArchivedKey(qname)}
+	now := time.Now()
+	limit := now.AddDate(0, 0, -archivedExpirationInDays).Unix() // 90 days ago
+	args := []interface{}{msg, now.Unix(), limit, maxArchiveSize}
+	res, err := archivePendingCmd.Run(r.client, keys, args...).Result()
+	if err != nil {
+		return 0, err
+	}
+	n, ok := res.(int64)
+	if !ok {
+		return 0, fmt.Errorf("could not cast %v to int64", res)
+	}
+	return n, nil
+}
+
+// ArchivePendingTask finds a pending task that matches the given id  from the given queue
+// and archives it. If a task that maches the id does not exist, it returns ErrTaskNotFound.
+func (r *RDB) ArchivePendingTask(qname string, id uuid.UUID) error {
+	qkey := base.QueueKey(qname)
+	data, err := r.client.LRange(qkey, 0, -1).Result()
+	if err != nil {
+		return err
+	}
+	for _, s := range data {
+		msg, err := base.DecodeMessage(s)
+		if err != nil {
+			return err
+		}
+		if msg.ID == id {
+			n, err := r.archivePending(qname, s)
+			if err != nil {
+				return err
+			}
+			if n == 0 {
+				return ErrTaskNotFound
+			}
+			return nil
+		}
+	}
+	return ErrTaskNotFound
+}
+
 // ArchiveAllRetryTasks archives all retry tasks from the given queue and
 // returns the number of tasks that were moved.
 func (r *RDB) ArchiveAllRetryTasks(qname string) (int64, error) {
@@ -500,6 +560,39 @@ func (r *RDB) ArchiveAllScheduledTasks(qname string) (int64, error) {
 	return r.removeAndArchiveAll(base.ScheduledKey(qname), base.ArchivedKey(qname))
 }
 
+// KEYS[1] -> asynq:{<qname>}
+// KEYS[2] -> asynq:{<qname>}:archived
+// ARGV[1] -> current timestamp
+// ARGV[2] -> cutoff timestamp (e.g., 90 days ago)
+// ARGV[3] -> max number of tasks in archive (e.g., 100)
+var archiveAllPendingCmd = redis.NewScript(`
+local msgs = redis.call("LRANGE", KEYS[1], 0, -1)
+for _, msg in ipairs(msgs) do
+	redis.call("ZADD", KEYS[2], ARGV[1], msg)
+	redis.call("ZREMRANGEBYSCORE", KEYS[2], "-inf", ARGV[2])
+	redis.call("ZREMRANGEBYRANK", KEYS[2], 0, -ARGV[3])
+end
+redis.call("DEL", KEYS[1])
+return table.getn(msgs)`)
+
+// ArchiveAllPendingTasks archives all pending tasks from the given queue and
+// returns the number of tasks that were moved.
+func (r *RDB) ArchiveAllPendingTasks(qname string) (int64, error) {
+	keys := []string{base.QueueKey(qname), base.ArchivedKey(qname)}
+	now := time.Now()
+	limit := now.AddDate(0, 0, -archivedExpirationInDays).Unix() // 90 days ago
+	args := []interface{}{now.Unix(), limit, maxArchiveSize}
+	res, err := archiveAllPendingCmd.Run(r.client, keys, args...).Result()
+	if err != nil {
+		return 0, err
+	}
+	n, ok := res.(int64)
+	if !ok {
+		return 0, fmt.Errorf("could not cast %v to int64", res)
+	}
+	return n, nil
+}
+
 // KEYS[1] -> ZSET to move task from (e.g., retry queue)
 // KEYS[2] -> asynq:{<qname>}:archived
 // ARGV[1] -> score of the task to archive
@@ -585,6 +678,33 @@ func (r *RDB) DeleteScheduledTask(qname string, id uuid.UUID, score int64) error
 	return r.deleteTask(base.ScheduledKey(qname), id.String(), float64(score))
 }
 
+// DeletePendingTask deletes a pending tasks that matches the given id from the given queue.
+// If a task that matches the id does not exist, it returns ErrTaskNotFound.
+func (r *RDB) DeletePendingTask(qname string, id uuid.UUID) error {
+	qkey := base.QueueKey(qname)
+	data, err := r.client.LRange(qkey, 0, -1).Result()
+	if err != nil {
+		return err
+	}
+	for _, s := range data {
+		msg, err := base.DecodeMessage(s)
+		if err != nil {
+			return err
+		}
+		if msg.ID == id {
+			n, err := r.client.LRem(qkey, 1, s).Result()
+			if err != nil {
+				return err
+			}
+			if n == 0 {
+				return ErrTaskNotFound
+			}
+			return nil
+		}
+	}
+	return ErrTaskNotFound
+}
+
 var deleteTaskCmd = redis.NewScript(`
 local msgs = redis.call("ZRANGEBYSCORE", KEYS[1], ARGV[1], ARGV[1])
 for _, msg in ipairs(msgs) do
@@ -647,6 +767,26 @@ func (r *RDB) deleteAll(key string) (int64, error) {
 	return n, nil
 }
 
+// KEYS[1] -> asynq:{<qname>}
+var deleteAllPendingCmd = redis.NewScript(`
+local n = redis.call("LLEN", KEYS[1])
+redis.call("DEL", KEYS[1])
+return n`)
+
+// DeleteAllPendingTasks deletes all pending tasks from the given queue
+// and returns the number of tasks deleted.
+func (r *RDB) DeleteAllPendingTasks(qname string) (int64, error) {
+	res, err := deleteAllPendingCmd.Run(r.client, []string{base.QueueKey(qname)}).Result()
+	if err != nil {
+		return 0, err
+	}
+	n, ok := res.(int64)
+	if !ok {
+		return 0, fmt.Errorf("could not cast %v to int64", res)
+	}
+	return n, nil
+}
+
 // ErrQueueNotFound indicates specified queue does not exist.
 type ErrQueueNotFound struct {
 	qname string
@@ -741,9 +881,8 @@ func (r *RDB) RemoveQueue(qname string, force bool) error {
 	if err := script.Run(r.client, keys).Err(); err != nil {
 		if err.Error() == "QUEUE NOT EMPTY" {
 			return &ErrQueueNotEmpty{qname}
-		} else {
-			return err
 		}
+		return err
 	}
 	return r.client.SRem(base.AllQueues, qname).Err()
 }
diff --git a/internal/rdb/inspect_test.go b/internal/rdb/inspect_test.go
index 3dd53d4..d838423 100644
--- a/internal/rdb/inspect_test.go
+++ b/internal/rdb/inspect_test.go
@@ -3017,7 +3017,7 @@ func TestWriteListClearSchedulerEntries(t *testing.T) {
 	schedulerID := "127.0.0.1:9876:abc123"
 
 	data := []*base.SchedulerEntry{
-		&base.SchedulerEntry{
+		{
 			Spec:    "* * * * *",
 			Type:    "foo",
 			Payload: nil,
@@ -3025,7 +3025,7 @@ func TestWriteListClearSchedulerEntries(t *testing.T) {
 			Next:    now.Add(5 * time.Hour),
 			Prev:    now.Add(-2 * time.Hour),
 		},
-		&base.SchedulerEntry{
+		{
 			Spec:    "@every 20m",
 			Type:    "bar",
 			Payload: map[string]interface{}{"fiz": "baz"},
diff --git a/tools/asynq/cmd/task.go b/tools/asynq/cmd/task.go
index 4d466f6..074dade 100644
--- a/tools/asynq/cmd/task.go
+++ b/tools/asynq/cmd/task.go
@@ -104,7 +104,7 @@ var taskArchiveCmd = &cobra.Command{
 	Use:   "archive --queue=QUEUE --key=KEY",
 	Short: "Archive a task with the given key",
 	Args:  cobra.NoArgs,
-	Run:   taskKill,
+	Run:   taskArchive,
 }
 
 var taskDeleteCmd = &cobra.Command{
@@ -214,10 +214,10 @@ func listPendingTasks(qname string, pageNum, pageSize int) {
 		return
 	}
 	printTable(
-		[]string{"ID", "Type", "Payload"},
+		[]string{"Key", "Type", "Payload"},
 		func(w io.Writer, tmpl string) {
 			for _, t := range tasks {
-				fmt.Fprintf(w, tmpl, t.ID, t.Type, t.Payload)
+				fmt.Fprintf(w, tmpl, t.Key(), t.Type, t.Payload)
 			}
 		},
 	)
@@ -305,7 +305,7 @@ func taskCancel(cmd *cobra.Command, args []string) {
 	}
 }
 
-func taskKill(cmd *cobra.Command, args []string) {
+func taskArchive(cmd *cobra.Command, args []string) {
 	qname, err := cmd.Flags().GetString("queue")
 	if err != nil {
 		fmt.Printf("error: %v\n", err)
@@ -323,7 +323,7 @@ func taskKill(cmd *cobra.Command, args []string) {
 		fmt.Printf("error: %v\n", err)
 		os.Exit(1)
 	}
-	fmt.Println("task transitioned to archived state")
+	fmt.Println("task archived")
 }
 
 func taskDelete(cmd *cobra.Command, args []string) {
@@ -365,7 +365,7 @@ func taskRun(cmd *cobra.Command, args []string) {
 		fmt.Printf("error: %v\n", err)
 		os.Exit(1)
 	}
-	fmt.Println("task transitioned to pending state")
+	fmt.Println("task is now pending")
 }
 
 func taskArchiveAll(cmd *cobra.Command, args []string) {
@@ -383,6 +383,8 @@ func taskArchiveAll(cmd *cobra.Command, args []string) {
 	i := createInspector()
 	var n int
 	switch state {
+	case "pending":
+		n, err = i.ArchiveAllPendingTasks(qname)
 	case "scheduled":
 		n, err = i.ArchiveAllScheduledTasks(qname)
 	case "retry":
@@ -395,7 +397,7 @@ func taskArchiveAll(cmd *cobra.Command, args []string) {
 		fmt.Printf("error: %v\n", err)
 		os.Exit(1)
 	}
-	fmt.Printf("%d tasks transitioned to archived state\n", n)
+	fmt.Printf("%d tasks archived\n", n)
 }
 
 func taskDeleteAll(cmd *cobra.Command, args []string) {
@@ -413,6 +415,8 @@ func taskDeleteAll(cmd *cobra.Command, args []string) {
 	i := createInspector()
 	var n int
 	switch state {
+	case "pending":
+		n, err = i.DeleteAllPendingTasks(qname)
 	case "scheduled":
 		n, err = i.DeleteAllScheduledTasks(qname)
 	case "retry":
@@ -459,5 +463,5 @@ func taskRunAll(cmd *cobra.Command, args []string) {
 		fmt.Printf("error: %v\n", err)
 		os.Exit(1)
 	}
-	fmt.Printf("%d tasks transitioned to pending state\n", n)
+	fmt.Printf("%d tasks are now pending\n", n)
 }
diff --git a/tools/go.mod b/tools/go.mod
index 571fbb2..d033b45 100644
--- a/tools/go.mod
+++ b/tools/go.mod
@@ -3,6 +3,7 @@ module github.com/hibiken/asynq/tools
 go 1.13
 
 require (
+	github.com/armon/consul-api v0.0.0-20180202201655-eb2c6b5be1b6 // indirect
 	github.com/coreos/go-etcd v2.0.0+incompatible // indirect
 	github.com/cpuguy83/go-md2man v1.0.10 // indirect
 	github.com/fatih/color v1.9.0
@@ -11,9 +12,11 @@ require (
 	github.com/hibiken/asynq v0.14.0
 	github.com/mitchellh/go-homedir v1.1.0
 	github.com/spf13/cast v1.3.1
-	github.com/spf13/cobra v1.0.0
-	github.com/spf13/viper v1.6.2
+	github.com/spf13/cobra v1.1.1
+	github.com/spf13/viper v1.7.0
+	github.com/ugorji/go v1.1.4 // indirect
 	github.com/ugorji/go/codec v0.0.0-20181204163529-d75b2dcb6bc8 // indirect
+	github.com/xordataexchange/crypt v0.0.3-0.20170626215501-b2862e3d0a77 // indirect
 )
 
 replace github.com/hibiken/asynq => ./..
diff --git a/tools/go.sum b/tools/go.sum
index eeeda92..506cbe6 100644
--- a/tools/go.sum
+++ b/tools/go.sum
@@ -1,31 +1,54 @@
 cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU=
+cloud.google.com/go v0.44.1/go.mod h1:iSa0KzasP4Uvy3f1mN/7PiObzGgflwredwwASm/v6AU=
+cloud.google.com/go v0.44.2/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY=
+cloud.google.com/go v0.45.1/go.mod h1:RpBamKRgapWJb87xiFSdk4g1CME7QZg3uwTez+TSTjc=
+cloud.google.com/go v0.46.3/go.mod h1:a6bKKbmY7er1mI7TEI4lsAkts/mkhTSZK8w33B4RAg0=
+cloud.google.com/go/bigquery v1.0.1/go.mod h1:i/xbL2UlR5RvWAURpBYZTtm/cXjCha9lbfbpx4poX+o=
+cloud.google.com/go/datastore v1.0.0/go.mod h1:LXYbyblFSglQ5pkeyhO+Qmw7ukd3C+pD7TKLgZqpHYE=
+cloud.google.com/go/firestore v1.1.0/go.mod h1:ulACoGHTpvq5r8rxGJ4ddJZBZqakUQqClKRT5SZwBmk=
+cloud.google.com/go/pubsub v1.0.1/go.mod h1:R0Gpsv3s54REJCy4fxDixWD93lHJMoZTyQ2kNxGRt3I=
+cloud.google.com/go/storage v1.0.0/go.mod h1:IhtSnM/ZTZV8YYJWCY8RULGVqBDmpoyjwiyrjsg+URw=
+dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU=
 github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
+github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
 github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU=
 github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
 github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
+github.com/armon/circbuf v0.0.0-20150827004946-bbbad097214e/go.mod h1:3U/XgcO3hCbHZ8TKRvWD2dDTCfh9M9ya+I9JpbB7O8o=
 github.com/armon/consul-api v0.0.0-20180202201655-eb2c6b5be1b6/go.mod h1:grANhF5doyWs3UAsr3K4I6qtAmlQcZDesFNEHPZAzj8=
+github.com/armon/go-metrics v0.0.0-20180917152333-f0300d1749da/go.mod h1:Q73ZrmVTwzkszR9V5SSuryQ31EELlFMUz1kKyl939pY=
+github.com/armon/go-radix v0.0.0-20180808171621-7fddfc383310/go.mod h1:ufUuZ+zHj4x4TnLV4JWEpy2hxWSpsRywHrMgIH9cCH8=
 github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q=
 github.com/beorn7/perks v1.0.0/go.mod h1:KWe93zE9D1o94FZ5RNwFwVgaQK1VOXiVxmqh+CedLV8=
+github.com/bgentry/speakeasy v0.1.0/go.mod h1:+zsyZBPWlz7T6j88CTgSN5bM796AkVf0kBD4zp0CCIs=
+github.com/bketelsen/crypt v0.0.3-0.20200106085610-5cbc8cc4026c/go.mod h1:MKsuJmJgSg28kpZDP6UIiPt0e0Oz0kqKNGyRaWEPv84=
 github.com/cespare/xxhash v1.1.0/go.mod h1:XrSqR1VqqWfGrhpAt58auRo0WTKS1nRRg3ghfAqPWnc=
 github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
 github.com/coreos/bbolt v1.3.2/go.mod h1:iRUV2dpdMOn7Bo10OQBFzIJO9kkE559Wcmn+qkEiiKk=
 github.com/coreos/etcd v3.3.10+incompatible/go.mod h1:uF7uidLiAD3TWHmW31ZFd/JWoc32PjwdhPthX9715RE=
+github.com/coreos/etcd v3.3.13+incompatible/go.mod h1:uF7uidLiAD3TWHmW31ZFd/JWoc32PjwdhPthX9715RE=
 github.com/coreos/go-etcd v2.0.0+incompatible/go.mod h1:Jez6KQU2B/sWsbdaef3ED8NzMklzPG4d5KIOhIy30Tk=
 github.com/coreos/go-semver v0.2.0/go.mod h1:nnelYz7RCh+5ahJtPPxZlU+153eP4D4r3EedlOD2RNk=
+github.com/coreos/go-semver v0.3.0/go.mod h1:nnelYz7RCh+5ahJtPPxZlU+153eP4D4r3EedlOD2RNk=
 github.com/coreos/go-systemd v0.0.0-20190321100706-95778dfbb74e/go.mod h1:F5haX7vjVVG0kc13fIWeqUViNPyEJxv/OmvnBo0Yme4=
 github.com/coreos/pkg v0.0.0-20180928190104-399ea9e2e55f/go.mod h1:E3G3o1h8I7cfcXa63jLwjI0eiQQMgzzUDFVpN/nH/eA=
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@@ -111,8 +180,11 @@ github.com/prometheus/tsdb v0.7.1/go.mod h1:qhTCs0VvXwvX/y3TZrWD7rabWM+ijKTux40T
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