xkcd.WTF!?

Image loading failed. try again

Push Notifications

xkcd 3074

NOTIFICATION: Now dismissing a head of the Notification Hydra… NOTIFICATION: Success! You have dismissed a head of the Notification Hydra!

Explanation ➲

The comic uses push notifications to change the comic image over time and make other statements. Upon viewing the comic for the first time, a sequence of notifications will be rendered over the comic itself. The notifications have a fade-in animation and appear one after another. The sequence is divided into several "groups" of notifications, each containing up to 4 regular notifications and an interactable button, which has a circled arrow icon to the right as well as a different text color. Clicking the arrow removes all notifications on screen and proceeds the sequence to the next group.

At the end of the sequence, a red-background option to sign up for xkcd notifications is presented. This part differs depending on if the user is "playing" from a mobile or desktop browser.

  • On desktop, clicking this will result in the browser prompting the user to allow or block xkcd.com's request to send push notifications. By allowing, the game begins. If blocked, the comic shows a message "An actual error occurred :(", and the laptop bursts into flames (see the image in the table below). It also blows up in response to any other browser error, such as a 500 Internal Server Error, which is reported to happen if you click the pause button too quickly.[actual citation needed]
  • On mobile, a new on-screen notification will show up, telling the user to add zk to their home screen in order for it to send push notifications on mobile. Upon doing so and opening the webpage from the home screen, the system will prompt the user to allow or block push notifications from this webpage. The outcomes of allowing and denying are the same as on desktop.

Once the game begins, you are provided with two buttons: one labeled "Emergency Stop", and one labeled "Silence notifications at a cost". Clicking the "Emergency Stop" button allows you to either restart the full game or to subscribe just to thrice-weekly notifications for new xkcd comics, while the second button will temporarily silence notifications, supposedly at the cost of notifying two random people.

The title text references the Lernaean Hydra, a multi-headed serpent-like monster from Greek mythology; the Greek hero Heracles was tasked with slaying the Hydra as the second of his twelve labours. When he cut off one of its heads, however, two heads would grow in its place, resulting in more heads than before; Heracles soon realized he could not kill the Hydra in this fashion. It describes a similar situation with the "Notification Hydra": a push notification "head" of the Notification Hydra was dismissed, which subsequently spawned two more push notification heads providing updates about the status of the dismissal. If one of these new notifications were to be dismissed, it would again spawn another set of the same two push notification heads; thus, the Notification Hydra is unkillable in a manner similar to the original.

Up to 7 clickable cats periodically spawn at predetermined positions around the page, including one on the edge of the Emergency Stop button. The subdirectory where the images and scripts for this comic are stored is titled 'marconi,' which is likely a reference to the Italian engineer and inventor of the same name, Guglielmo Marconi, who is credited with inventing the radio, and did much work in the field of early communication systems.

Notifications

When graphing the coordinates from the zoom notifications, a turtle and a squirrel appear.

A general list of notification types include:

  • The "Zoom notifications" only include numeric coordinates, sometimes prefixed with "oh look!". Plotting the normal coordinates creates an image of a turtle, a reference to 1416: Pixels, while the coordinates prefixed with "oh look!" create a squirrel behind the turtle. See the image above.
  • A few starter notifications about this comic, the successful sending of a notification of this comic, and the lack of another comic.
  • An announcement that an old comic was posted, specifying a (seemingly) random comic and its publication date. The publication date seems to be shown in a random calendar date format.
  • A word game where a first notification asks you to type a word, with further notifications apparently to be sent whenever someone chooses the same word as you.
    • The word can be chosen by clicking on the first notification, which lands you in the comic page. The comic pane will be changed to a comic-style input dialogue with a space for the word and a submit button. Upon providing a word, a notification informs you that you will then receive notifications (of the form "Someone else has selected the word <Your Word>!"), and that your choice is permanent and cannot be changed. You can also submit a blank text field, thus receiving "Someone else has selected the word !" notifications.
  • A "streak" notification counting the number of times you've clicked it. To start with, the message changes every 10 clicks; then every 50 clicks (after 100) and then at increasing intervals. After every 50 clicks there is an offer to make future clicks count twice, making this a simple version of Cookie Clicker. If you choose to accept the offer by clicking on it, it will reset your clicks back to zero but makes all future clicks count double of the current click rate; you can also reject the offer by continuing to click on the click counter message. There are occasionally notifications encouraging you to keep clicking and "extend your streak," tempting you with "a free click to keep you going". After 400 clicks it will reset your clicks back to zero but makes all future clicks count four times.
    • Early notifications encourage further clicking.
    • Approaching a hundred, the messages grow more concerned and later start warning that the server will crash or has crashed.
    • Above 750: "Are you just doing this to annoy me?"
    • 1000-2000: "You're just doing this to annoy you?"
    • Above 2000: "I guess it worked"
    • Above 1000000: "Wow, you're really into this"
  • "Constant reminders" with references to mathematical, physical, or some other constants. The constant values are stated to be "at the tone", likely in reference to time-of-day phone services, which are live or recorded human voice services that tell you the exact time "at the third stroke" over the phone. (In at least some portions of the USA, the wording did use "tone" rather than "strike." For example, "At the tone, the time will be 2:32pm, and 10 seconds ... (beep)")
  • A "have you seen my cat?" notification which causes all the cats to spawn when clicked.
  • Cat fact notifications that appear when a cat is clicked, in reference to this exchange.
  • Various "Erroneous Alerts" with a warning triangle emoji (⚠ U+26A0), some with just flavor text, some corresponding to changes in the comic image.
  • A notification that offers to provide weather alerts for your location, which leads into a series of notifications asking whether you live in a named city. If none of the cities that it knows are selected, your location is set to the summit of Mount Washington.
  • When the time is near a full hour or half-hour, that the current time is five o'clock.
  • An invitation to subscribe to the "What if?" YouTube channel
  • A notification with the heading "System Log" that reads (INFO): A user has paused notifications
    • This notification presumably appears when a random user has pressed the "Silence notifications at a cost" button.
  • A "Carriage Return Line Feed", referencing the Windows standard of storing line returns as a carriage return character followed by a line feed (newline) character. However, the xkcd Carriage Return Line Feed is instead a news feed concerning the next stop on a supposed "Carriage Return Line" of a train system. The announcements are all related to stations on the London Underground, including the use of the phrase "Mind the gap".
  • A reminder to comment and subscribe. When clicked, they redirect the user to one of the following Wikipedia Talk pages:
Wikipedia Talk pages
Zoom Notification
Zoom Notification (33,0)
Zoom Notification (34,0)
Zoom Notification (35,0)
Zoom Notification (36,0)
Zoom Notification (37,0)
Zoom Notification (38,0)
Zoom Notification (28,1)
Zoom Notification (29,1)
Zoom Notification (30,1)
Zoom Notification (31,1)
Zoom Notification (32,1)
Zoom Notification (33,1)
Zoom Notification (34,1)
Zoom Notification (35,1)
Zoom Notification (36,1)
Zoom Notification (37,1)
Zoom Notification (38,1)
Zoom Notification (39,1)
Zoom Notification (40,1)
Zoom Notification (41,1)
Zoom Notification (42,1)
Zoom Notification (43,1)
Zoom Notification (44,1)
Zoom Notification (45,1)
Zoom Notification (46,1)
Zoom Notification (24,2)
Zoom Notification (25,2)
Zoom Notification (26,2)
Zoom Notification (27,2)
Zoom Notification (28,2)
Zoom Notification (29,2)
Zoom Notification (30,2)
Zoom Notification (31,2)
Zoom Notification (32,2)
Zoom Notification (33,2)
Zoom Notification (34,2)
Zoom Notification (35,2)
Zoom Notification (36,2)
Zoom Notification (37,2)
Zoom Notification (38,2)
Zoom Notification (39,2)
Zoom Notification (40,2)
Zoom Notification (41,2)
Zoom Notification (42,2)
Zoom Notification (43,2)
Zoom Notification (44,2)
Zoom Notification (45,2)
Zoom Notification (46,2)
Zoom Notification (47,2)
Zoom Notification (48,2)
Zoom Notification (49,2)
Zoom Notification (50,2)
Zoom Notification (51,2)
Zoom Notification (21,3)
Zoom Notification (22,3)
Zoom Notification (23,3)
Zoom Notification (24,3)
Zoom Notification (25,3)
Zoom Notification (26,3)
Zoom Notification (27,3)
Zoom Notification (28,3)
Zoom Notification (29,3)
Zoom Notification (30,3)
Zoom Notification (31,3)
Zoom Notification (32,3)
Zoom Notification (33,3)
Zoom Notification (34,3)
Zoom Notification (37,3)
Zoom Notification (38,3)
Zoom Notification (39,3)
Zoom Notification (45,3)
Zoom Notification (46,3)
Zoom Notification (47,3)
Zoom Notification (48,3)
Zoom Notification (49,3)
Zoom Notification (50,3)
Zoom Notification (51,3)
Zoom Notification (52,3)
Zoom Notification (53,3)
Zoom Notification (19,4)
Zoom Notification (20,4)
Zoom Notification (21,4)
Zoom Notification (22,4)
Zoom Notification (23,4)
Zoom Notification (24,4)
Zoom Notification (25,4)
Zoom Notification (26,4)
Zoom Notification (27,4)
Zoom Notification (28,4)
Zoom Notification (29,4)
Zoom Notification (30,4)
Zoom Notification (31,4)
Zoom Notification (36,4)
Zoom Notification (37,4)
Zoom Notification (38,4)
Zoom Notification (45,4)
Zoom Notification (46,4)
Zoom Notification (49,4)
Zoom Notification (50,4)
Zoom Notification (51,4)
Zoom Notification (52,4)
Zoom Notification (53,4)
Zoom Notification (54,4)
Zoom Notification (55,4)
Zoom Notification (18,5)
Zoom Notification (19,5)
Zoom Notification (20,5)
Zoom Notification (21,5)
Zoom Notification (22,5)
Zoom Notification (23,5)
Zoom Notification (24,5)
Zoom Notification (25,5)
Zoom Notification (26,5)
Zoom Notification (29,5)
Zoom Notification (31,5)
Zoom Notification (35,5)
Zoom Notification (36,5)
Zoom Notification (37,5)
Zoom Notification (38,5)
Zoom Notification (44,5)
Zoom Notification (45,5)
Zoom Notification (46,5)
Zoom Notification (51,5)
Zoom Notification (52,5)
Zoom Notification (53,5)
Zoom Notification (54,5)
Zoom Notification (55,5)
Zoom Notification (56,5)
Zoom Notification (17,6)
Zoom Notification (18,6)
Zoom Notification (19,6)
Zoom Notification (20,6)
Zoom Notification (21,6)
Zoom Notification (22,6)
Zoom Notification (23,6)
Zoom Notification (28,6)
Zoom Notification (29,6)
Zoom Notification (30,6)
Zoom Notification (31,6)
Zoom Notification (32,6)
Zoom Notification (34,6)
Zoom Notification (35,6)
Zoom Notification (36,6)
Zoom Notification (37,6)
Zoom Notification (38,6)
Zoom Notification (39,6)
Zoom Notification (40,6)
Zoom Notification (43,6)
Zoom Notification (44,6)
Zoom Notification (45,6)
Zoom Notification (46,6)
Zoom Notification (47,6)
Zoom Notification (53,6)
Zoom Notification (54,6)
Zoom Notification (55,6)
Zoom Notification (56,6)
Zoom Notification (57,6)
Zoom Notification (16,7)
Zoom Notification (17,7)
Zoom Notification (18,7)
Zoom Notification (20,7)
Zoom Notification (21,7)
Zoom Notification (22,7)
Zoom Notification (23,7)
Zoom Notification (27,7)
Zoom Notification (28,7)
Zoom Notification (29,7)
Zoom Notification (31,7)
Zoom Notification (32,7)
Zoom Notification (33,7)
Zoom Notification (34,7)
Zoom Notification (35,7)
Zoom Notification (39,7)
Zoom Notification (40,7)
Zoom Notification (41,7)
Zoom Notification (42,7)
Zoom Notification (43,7)
Zoom Notification (44,7)
Zoom Notification (46,7)
Zoom Notification (47,7)
Zoom Notification (48,7)
Zoom Notification (52,7)
Zoom Notification (53,7)
Zoom Notification (54,7)
Zoom Notification (55,7)
Zoom Notification (56,7)
Zoom Notification (57,7)
Zoom Notification (58,7)
Zoom Notification (59,7)
Zoom Notification (16,8)
Zoom Notification (17,8)
Zoom Notification (18,8)
Zoom Notification (19,8)
Zoom Notification (21,8)
Zoom Notification (22,8)
Zoom Notification (23,8)
Zoom Notification (24,8)
Zoom Notification (25,8)
Zoom Notification (26,8)
Zoom Notification (27,8)
Zoom Notification (32,8)
Zoom Notification (33,8)
Zoom Notification (34,8)
Zoom Notification (40,8)
Zoom Notification (41,8)
Zoom Notification (42,8)
Zoom Notification (43,8)
Zoom Notification (47,8)
Zoom Notification (48,8)
Zoom Notification (49,8)
Zoom Notification (50,8)
Zoom Notification (51,8)
Zoom Notification (52,8)
Zoom Notification (53,8)
Zoom Notification (54,8)
Zoom Notification (56,8)
Zoom Notification (57,8)
Zoom Notification (58,8)
Zoom Notification (59,8)
Zoom Notification (60,8)
Zoom Notification (15,9)
Zoom Notification (16,9)
Zoom Notification (17,9)
Zoom Notification (18,9)
Zoom Notification (23,9)
Zoom Notification (24,9)
Zoom Notification (25,9)
Zoom Notification (26,9)
Zoom Notification (33,9)
Zoom Notification (34,9)
Zoom Notification (42,9)
Zoom Notification (48,9)
Zoom Notification (49,9)
Zoom Notification (50,9)
Zoom Notification (51,9)
Zoom Notification (52,9)
Zoom Notification (53,9)
Zoom Notification (57,9)
Zoom Notification (58,9)
Zoom Notification (59,9)
Zoom Notification (60,9)
Zoom Notification (61,9)
Zoom Notification (69,9)
Zoom Notification (70,9)
Zoom Notification (71,9)
Zoom Notification (72,9)
Zoom Notification (73,9)
Zoom Notification (15,10)
Zoom Notification (16,10)
Zoom Notification (17,10)
Zoom Notification (18,10)
Zoom Notification (25,10)
Zoom Notification (33,10)
Zoom Notification (34,10)
Zoom Notification (42,10)
Zoom Notification (43,10)
Zoom Notification (49,10)
Zoom Notification (50,10)
Zoom Notification (52,10)
Zoom Notification (53,10)
Zoom Notification (57,10)
Zoom Notification (58,10)
Zoom Notification (59,10)
Zoom Notification (60,10)
Zoom Notification (61,10)
Zoom Notification (65,10)
Zoom Notification (66,10)
Zoom Notification (67,10)
Zoom Notification (68,10)
Zoom Notification (69,10)
Zoom Notification (70,10)
Zoom Notification (71,10)
Zoom Notification (72,10)
Zoom Notification (73,10)
Zoom Notification (74,10)
Zoom Notification (75,10)
Zoom Notification (76,10)
Zoom Notification (14,11)
Zoom Notification (15,11)
Zoom Notification (16,11)
Zoom Notification (17,11)
Zoom Notification (25,11)
Zoom Notification (33,11)
Zoom Notification (34,11)
Zoom Notification (42,11)
Zoom Notification (43,11)
Zoom Notification (48,11)
Zoom Notification (49,11)
Zoom Notification (52,11)
Zoom Notification (53,11)
Zoom Notification (58,11)
Zoom Notification (59,11)
Zoom Notification (60,11)
Zoom Notification (61,11)
Zoom Notification (62,11)
Zoom Notification (63,11)
Zoom Notification (64,11)
Zoom Notification (65,11)
Zoom Notification (66,11)
Zoom Notification (67,11)
Zoom Notification (68,11)
Zoom Notification (69,11)
Zoom Notification (70,11)
Zoom Notification (71,11)
Zoom Notification (72,11)
Zoom Notification (73,11)
Zoom Notification (74,11)
Zoom Notification (75,11)
Zoom Notification (76,11)
Zoom Notification (14,12)
Zoom Notification (15,12)
Zoom Notification (16,12)
Zoom Notification (17,12)
Zoom Notification (21,12)
Zoom Notification (22,12)
Zoom Notification (23,12)
Zoom Notification (24,12)
Zoom Notification (25,12)
Zoom Notification (32,12)
Zoom Notification (33,12)
Zoom Notification (34,12)
Zoom Notification (35,12)
Zoom Notification (41,12)
Zoom Notification (42,12)
Zoom Notification (43,12)
Zoom Notification (44,12)
Zoom Notification (47,12)
Zoom Notification (48,12)
Zoom Notification (52,12)
Zoom Notification (53,12)
Zoom Notification (54,12)
Zoom Notification (58,12)
Zoom Notification (59,12)
Zoom Notification (60,12)
Zoom Notification (61,12)
Zoom Notification (62,12)
Zoom Notification (63,12)
Zoom Notification (65,12)
Zoom Notification (66,12)
Zoom Notification (67,12)
Zoom Notification (68,12)
Zoom Notification (69,12)
Zoom Notification (73,12)
Zoom Notification (74,12)
Zoom Notification (75,12)
Zoom Notification (76,12)
Zoom Notification (77,12)
Zoom Notification (14,13)
Zoom Notification (15,13)
Zoom Notification (16,13)
Zoom Notification (17,13)
Zoom Notification (18,13)
Zoom Notification (19,13)
Zoom Notification (20,13)
Zoom Notification (21,13)
Zoom Notification (22,13)
Zoom Notification (23,13)
Zoom Notification (24,13)
Zoom Notification (25,13)
Zoom Notification (26,13)
Zoom Notification (31,13)
Zoom Notification (32,13)
Zoom Notification (33,13)
Zoom Notification (34,13)
Zoom Notification (35,13)
Zoom Notification (36,13)
Zoom Notification (39,13)
Zoom Notification (40,13)
Zoom Notification (41,13)
Zoom Notification (43,13)
Zoom Notification (44,13)
Zoom Notification (46,13)
Zoom Notification (47,13)
Zoom Notification (48,13)
Zoom Notification (49,13)
Zoom Notification (50,13)
Zoom Notification (51,13)
Zoom Notification (52,13)
Zoom Notification (53,13)
Zoom Notification (54,13)
Zoom Notification (55,13)
Zoom Notification (57,13)
Zoom Notification (58,13)
Zoom Notification (59,13)
Zoom Notification (60,13)
Zoom Notification (61,13)
Zoom Notification (62,13)
Zoom Notification (63,13)
Zoom Notification (64,13)
Zoom Notification (65,13)
Zoom Notification (70,13)
Zoom Notification (71,13)
Zoom Notification (74,13)
Zoom Notification (75,13)
Zoom Notification (76,13)
Zoom Notification (77,13)
Zoom Notification (12,14)
Zoom Notification (13,14)
Zoom Notification (14,14)
Zoom Notification (15,14)
Zoom Notification (16,14)
Zoom Notification (17,14)
Zoom Notification (18,14)
Zoom Notification (19,14)
Zoom Notification (20,14)
Zoom Notification (21,14)
Zoom Notification (22,14)
Zoom Notification (23,14)
Zoom Notification (24,14)
Zoom Notification (25,14)
Zoom Notification (26,14)
Zoom Notification (30,14)
Zoom Notification (31,14)
Zoom Notification (32,14)
Zoom Notification (36,14)
Zoom Notification (37,14)
Zoom Notification (38,14)
Zoom Notification (39,14)
Zoom Notification (40,14)
Zoom Notification (44,14)
Zoom Notification (45,14)
Zoom Notification (46,14)
Zoom Notification (47,14)
Zoom Notification (48,14)
Zoom Notification (49,14)
Zoom Notification (50,14)
Zoom Notification (51,14)
Zoom Notification (52,14)
Zoom Notification (53,14)
Zoom Notification (54,14)
Zoom Notification (55,14)
Zoom Notification (56,14)
Zoom Notification (57,14)
Zoom Notification (58,14)
Zoom Notification (59,14)
Zoom Notification (60,14)
Zoom Notification (61,14)
Zoom Notification (70,14)
Zoom Notification (71,14)
Zoom Notification (74,14)
Zoom Notification (75,14)
Zoom Notification (76,14)
Zoom Notification (77,14)
Zoom Notification (11,15)
Zoom Notification (12,15)
Zoom Notification (13,15)
Zoom Notification (14,15)
Zoom Notification (15,15)
Zoom Notification (16,15)
Zoom Notification (17,15)
Zoom Notification (18,15)
Zoom Notification (19,15)
Zoom Notification (20,15)
Zoom Notification (21,15)
Zoom Notification (22,15)
Zoom Notification (23,15)
Zoom Notification (24,15)
Zoom Notification (25,15)
Zoom Notification (26,15)
Zoom Notification (27,15)
Zoom Notification (28,15)
Zoom Notification (29,15)
Zoom Notification (30,15)
Zoom Notification (31,15)
Zoom Notification (35,15)
Zoom Notification (36,15)
Zoom Notification (37,15)
Zoom Notification (38,15)
Zoom Notification (39,15)
Zoom Notification (44,15)
Zoom Notification (45,15)
Zoom Notification (46,15)
Zoom Notification (47,15)
Zoom Notification (48,15)
Zoom Notification (49,15)
Zoom Notification (50,15)
Zoom Notification (51,15)
Zoom Notification (52,15)
Zoom Notification (53,15)
Zoom Notification (54,15)
Zoom Notification (55,15)
Zoom Notification (56,15)
Zoom Notification (57,15)
Zoom Notification (58,15)
Zoom Notification (59,15)
Zoom Notification (60,15)
Zoom Notification (61,15)
Zoom Notification (75,15)
Zoom Notification (76,15)
Zoom Notification (77,15)
Zoom Notification (8,16)
Zoom Notification (9,16)
Zoom Notification (10,16)
Zoom Notification (11,16)
Zoom Notification (12,16)
Zoom Notification (13,16)
Zoom Notification (15,16)
Zoom Notification (16,16)
Zoom Notification (17,16)
Zoom Notification (18,16)
Zoom Notification (19,16)
Zoom Notification (20,16)
Zoom Notification (21,16)
Zoom Notification (22,16)
Zoom Notification (23,16)
Zoom Notification (24,16)
Zoom Notification (25,16)
Zoom Notification (27,16)
Zoom Notification (28,16)
Zoom Notification (29,16)
Zoom Notification (36,16)
Zoom Notification (38,16)
Zoom Notification (44,16)
Zoom Notification (45,16)
Zoom Notification (46,16)
Zoom Notification (47,16)
Zoom Notification (48,16)
Zoom Notification (49,16)
Zoom Notification (53,16)
Zoom Notification (54,16)
Zoom Notification (55,16)
Zoom Notification (56,16)
Zoom Notification (58,16)
Zoom Notification (59,16)
Zoom Notification (61,16)
Zoom Notification (62,16)
Zoom Notification (74,16)
Zoom Notification (75,16)
Zoom Notification (76,16)
Zoom Notification (77,16)
Zoom Notification (2,17)
Zoom Notification (3,17)
Zoom Notification (4,17)
Zoom Notification (5,17)
Zoom Notification (6,17)
Zoom Notification (7,17)
Zoom Notification (8,17)
Zoom Notification (9,17)
Zoom Notification (10,17)
Zoom Notification (11,17)
Zoom Notification (12,17)
Zoom Notification (16,17)
Zoom Notification (17,17)
Zoom Notification (19,17)
Zoom Notification (20,17)
Zoom Notification (21,17)
Zoom Notification (23,17)
Zoom Notification (24,17)
Zoom Notification (25,17)
Zoom Notification (26,17)
Zoom Notification (27,17)
Zoom Notification (28,17)
Zoom Notification (29,17)
Zoom Notification (30,17)
Zoom Notification (31,17)
Zoom Notification (32,17)
Zoom Notification (33,17)
Zoom Notification (34,17)
Zoom Notification (35,17)
Zoom Notification (37,17)
Zoom Notification (38,17)
Zoom Notification (42,17)
Zoom Notification (44,17)
Zoom Notification (45,17)
Zoom Notification (46,17)
Zoom Notification (47,17)
Zoom Notification (48,17)
Zoom Notification (54,17)
Zoom Notification (55,17)
Zoom Notification (56,17)
Zoom Notification (57,17)
Zoom Notification (58,17)
Zoom Notification (59,17)
Zoom Notification (60,17)
Zoom Notification (61,17)
Zoom Notification (73,17)
Zoom Notification (74,17)
Zoom Notification (75,17)
Zoom Notification (76,17)
Zoom Notification (77,17)
Zoom Notification (2,18)
Zoom Notification (3,18)
Zoom Notification (4,18)
Zoom Notification (5,18)
Zoom Notification (6,18)
Zoom Notification (7,18)
Zoom Notification (8,18)
Zoom Notification (9,18)
Zoom Notification (10,18)
Zoom Notification (11,18)
Zoom Notification (15,18)
Zoom Notification (16,18)
Zoom Notification (17,18)
Zoom Notification (18,18)
Zoom Notification (19,18)
Zoom Notification (20,18)
Zoom Notification (23,18)
Zoom Notification (24,18)
Zoom Notification (25,18)
Zoom Notification (26,18)
Zoom Notification (27,18)
Zoom Notification (28,18)
Zoom Notification (29,18)
Zoom Notification (30,18)
Zoom Notification (31,18)
Zoom Notification (32,18)
Zoom Notification (33,18)
Zoom Notification (34,18)
Zoom Notification (35,18)
Zoom Notification (36,18)
Zoom Notification (37,18)
Zoom Notification (38,18)
Zoom Notification (39,18)
Zoom Notification (40,18)
Zoom Notification (41,18)
Zoom Notification (42,18)
Zoom Notification (43,18)
Zoom Notification (44,18)
Zoom Notification (45,18)
Zoom Notification (46,18)
Zoom Notification (47,18)
Zoom Notification (48,18)
Zoom Notification (55,18)
Zoom Notification (56,18)
Zoom Notification (57,18)
Zoom Notification (58,18)
Zoom Notification (59,18)
Zoom Notification (60,18)
Zoom Notification (61,18)
Zoom Notification (62,18)
Zoom Notification (71,18)
Zoom Notification (72,18)
Zoom Notification (73,18)
Zoom Notification (74,18)
Zoom Notification (75,18)
Zoom Notification (76,18)
Zoom Notification (3,19)
Zoom Notification (4,19)
Zoom Notification (5,19)
Zoom Notification (6,19)
Zoom Notification (7,19)
Zoom Notification (8,19)
Zoom Notification (9,19)
Zoom Notification (12,19)
Zoom Notification (13,19)
Zoom Notification (14,19)
Zoom Notification (15,19)
Zoom Notification (16,19)
Zoom Notification (17,19)
Zoom Notification (18,19)
Zoom Notification (23,19)
Zoom Notification (24,19)
Zoom Notification (25,19)
Zoom Notification (26,19)
Zoom Notification (27,19)
Zoom Notification (31,19)
Zoom Notification (32,19)
Zoom Notification (33,19)
Zoom Notification (34,19)
Zoom Notification (35,19)
Zoom Notification (36,19)
Zoom Notification (37,19)
Zoom Notification (38,19)
Zoom Notification (39,19)
Zoom Notification (40,19)
Zoom Notification (41,19)
Zoom Notification (42,19)
Zoom Notification (43,19)
Zoom Notification (44,19)
Zoom Notification (45,19)
Zoom Notification (46,19)
Zoom Notification (47,19)
Zoom Notification (55,19)
Zoom Notification (56,19)
Zoom Notification (57,19)
Zoom Notification (58,19)
Zoom Notification (59,19)
Zoom Notification (60,19)
Zoom Notification (61,19)
Zoom Notification (62,19)
Zoom Notification (63,19)
Zoom Notification (64,19)
Zoom Notification (65,19)
Zoom Notification (66,19)
Zoom Notification (67,19)
Zoom Notification (68,19)
Zoom Notification (69,19)
Zoom Notification (70,19)
Zoom Notification (71,19)
Zoom Notification (72,19)
Zoom Notification (73,19)
Zoom Notification (74,19)
Zoom Notification (75,19)
Zoom Notification (5,20)
Zoom Notification (6,20)
Zoom Notification (8,20)
Zoom Notification (9,20)
Zoom Notification (10,20)
Zoom Notification (11,20)
Zoom Notification (12,20)
Zoom Notification (13,20)
Zoom Notification (14,20)
Zoom Notification (15,20)
Zoom Notification (16,20)
Zoom Notification (17,20)
Zoom Notification (22,20)
Zoom Notification (23,20)
Zoom Notification (24,20)
Zoom Notification (25,20)
Zoom Notification (26,20)
Zoom Notification (27,20)
Zoom Notification (44,20)
Zoom Notification (45,20)
Zoom Notification (46,20)
Zoom Notification (47,20)
Zoom Notification (56,20)
Zoom Notification (57,20)
Zoom Notification (58,20)
Zoom Notification (59,20)
Zoom Notification (60,20)
Zoom Notification (61,20)
Zoom Notification (62,20)
Zoom Notification (63,20)
Zoom Notification (64,20)
Zoom Notification (65,20)
Zoom Notification (66,20)
Zoom Notification (67,20)
Zoom Notification (68,20)
Zoom Notification (69,20)
Zoom Notification (70,20)
Zoom Notification (71,20)
Zoom Notification (72,20)
Zoom Notification (73,20)
Zoom Notification (74,20)
Zoom Notification (7,21)
Zoom Notification (8,21)
Zoom Notification (9,21)
Zoom Notification (10,21)
Zoom Notification (11,21)
Zoom Notification (12,21)
Zoom Notification (13,21)
Zoom Notification (14,21)
Zoom Notification (15,21)
Zoom Notification (16,21)
Zoom Notification (22,21)
Zoom Notification (23,21)
Zoom Notification (24,21)
Zoom Notification (25,21)
Zoom Notification (26,21)
Zoom Notification (27,21)
Zoom Notification (40,21)
Zoom Notification (41,21)
Zoom Notification (42,21)
Zoom Notification (43,21)
Zoom Notification (44,21)
Zoom Notification (45,21)
Zoom Notification (46,21)
Zoom Notification (47,21)
Zoom Notification (48,21)
Zoom Notification (49,21)
Zoom Notification (56,21)
Zoom Notification (57,21)
Zoom Notification (58,21)
Zoom Notification (59,21)
Zoom Notification (60,21)
Zoom Notification (61,21)
Zoom Notification (62,21)
Zoom Notification (63,21)
Zoom Notification (64,21)
Zoom Notification (65,21)
Zoom Notification (66,21)
Zoom Notification (67,21)
Zoom Notification (68,21)
Zoom Notification (69,21)
Zoom Notification (70,21)
Zoom Notification (71,21)
Zoom Notification (72,21)
Zoom Notification (13,22)
Zoom Notification (14,22)
Zoom Notification (15,22)
Zoom Notification (16,22)
Zoom Notification (21,22)
Zoom Notification (22,22)
Zoom Notification (23,22)
Zoom Notification (24,22)
Zoom Notification (25,22)
Zoom Notification (26,22)
Zoom Notification (27,22)
Zoom Notification (28,22)
Zoom Notification (29,22)
Zoom Notification (30,22)
Zoom Notification (31,22)
Zoom Notification (32,22)
Zoom Notification (33,22)
Zoom Notification (34,22)
Zoom Notification (35,22)
Zoom Notification (36,22)
Zoom Notification (37,22)
Zoom Notification (38,22)
Zoom Notification (39,22)
Zoom Notification (40,22)
Zoom Notification (41,22)
Zoom Notification (42,22)
Zoom Notification (43,22)
Zoom Notification (44,22)
Zoom Notification (45,22)
Zoom Notification (46,22)
Zoom Notification (47,22)
Zoom Notification (48,22)
Zoom Notification (49,22)
Zoom Notification (50,22)
Zoom Notification (51,22)
Zoom Notification (57,22)
Zoom Notification (58,22)
Zoom Notification (59,22)
Zoom Notification (60,22)
Zoom Notification (12,23)
Zoom Notification (13,23)
Zoom Notification (14,23)
Zoom Notification (15,23)
Zoom Notification (21,23)
Zoom Notification (22,23)
Zoom Notification (23,23)
Zoom Notification (24,23)
Zoom Notification (25,23)
Zoom Notification (26,23)
Zoom Notification (27,23)
Zoom Notification (28,23)
Zoom Notification (29,23)
Zoom Notification (30,23)
Zoom Notification (31,23)
Zoom Notification (32,23)
Zoom Notification (33,23)
Zoom Notification (34,23)
Zoom Notification (35,23)
Zoom Notification (36,23)
Zoom Notification (37,23)
Zoom Notification (38,23)
Zoom Notification (39,23)
Zoom Notification (40,23)
Zoom Notification (41,23)
Zoom Notification (42,23)
Zoom Notification (43,23)
Zoom Notification (44,23)
Zoom Notification (45,23)
Zoom Notification (47,23)
Zoom Notification (48,23)
Zoom Notification (49,23)
Zoom Notification (50,23)
Zoom Notification (51,23)
Zoom Notification (52,23)
Zoom Notification (57,23)
Zoom Notification (58,23)
Zoom Notification (59,23)
Zoom Notification (60,23)
Zoom Notification (12,24)
Zoom Notification (13,24)
Zoom Notification (14,24)
Zoom Notification (15,24)
Zoom Notification (20,24)
Zoom Notification (21,24)
Zoom Notification (23,24)
Zoom Notification (24,24)
Zoom Notification (25,24)
Zoom Notification (26,24)
Zoom Notification (27,24)
Zoom Notification (28,24)
Zoom Notification (29,24)
Zoom Notification (30,24)
Zoom Notification (31,24)
Zoom Notification (32,24)
Zoom Notification (33,24)
Zoom Notification (34,24)
Zoom Notification (35,24)
Zoom Notification (36,24)
Zoom Notification (37,24)
Zoom Notification (38,24)
Zoom Notification (39,24)
Zoom Notification (40,24)
Zoom Notification (41,24)
Zoom Notification (49,24)
Zoom Notification (50,24)
Zoom Notification (51,24)
Zoom Notification (52,24)
Zoom Notification (58,24)
Zoom Notification (59,24)
Zoom Notification (60,24)
Zoom Notification (12,25)
Zoom Notification (13,25)
Zoom Notification (14,25)
Zoom Notification (15,25)
Zoom Notification (16,25)
Zoom Notification (17,25)
Zoom Notification (18,25)
Zoom Notification (19,25)
Zoom Notification (20,25)
Zoom Notification (21,25)
Zoom Notification (22,25)
Zoom Notification (23,25)
Zoom Notification (49,25)
Zoom Notification (50,25)
Zoom Notification (51,25)
Zoom Notification (52,25)
Zoom Notification (53,25)
Zoom Notification (56,25)
Zoom Notification (57,25)
Zoom Notification (58,25)
Zoom Notification (59,25)
Zoom Notification (60,25)
Zoom Notification (12,26)
Zoom Notification (13,26)
Zoom Notification (14,26)
Zoom Notification (15,26)
Zoom Notification (16,26)
Zoom Notification (17,26)
Zoom Notification (18,26)
Zoom Notification (19,26)
Zoom Notification (20,26)
Zoom Notification (21,26)
Zoom Notification (22,26)
Zoom Notification (23,26)
Zoom Notification (50,26)
Zoom Notification (51,26)
Zoom Notification (52,26)
Zoom Notification (53,26)
Zoom Notification (54,26)
Zoom Notification (55,26)
Zoom Notification (56,26)
Zoom Notification (57,26)
Zoom Notification (58,26)
Zoom Notification (59,26)
Zoom Notification (60,26)
Zoom Notification (12,27)
Zoom Notification (13,27)
Zoom Notification (14,27)
Zoom Notification (15,27)
Zoom Notification (16,27)
Zoom Notification (17,27)
Zoom Notification (18,27)
Zoom Notification (19,27)
Zoom Notification (20,27)
Zoom Notification (21,27)
Zoom Notification (22,27)
Zoom Notification (50,27)
Zoom Notification (51,27)
Zoom Notification (52,27)
Zoom Notification (53,27)
Zoom Notification (54,27)
Zoom Notification (55,27)
Zoom Notification (56,27)
Zoom Notification (57,27)
Zoom Notification (58,27)
Zoom Notification (59,27)
Zoom Notification (60,27)
Zoom Notification (17,28)
Zoom Notification (18,28)
Zoom Notification (19,28)
Zoom Notification (20,28)
Zoom Notification (21,28)
Zoom Notification (22,28)
Zoom Notification (51,28)
Zoom Notification (52,28)
Zoom Notification (53,28)
Zoom Notification (54,28)
Zoom Notification (55,28)
Zoom Notification (56,28)
Zoom Notification (57,28)
Zoom Notification (58,28)
Zoom Notification (59,28)
Zoom Notification oh look! (1,1)
Zoom Notification oh look! (2,1)
Zoom Notification oh look! (3,1)
Zoom Notification oh look! (4,1)
Zoom Notification oh look! (13,1)
Zoom Notification oh look! (2,2)
Zoom Notification oh look! (3,2)
Zoom Notification oh look! (4,2)
Zoom Notification oh look! (5,2)
Zoom Notification oh look! (12,2)
Zoom Notification oh look! (13,2)
Zoom Notification oh look! (14,2)
Zoom Notification oh look! (15,2)
Zoom Notification oh look! (2,3)
Zoom Notification oh look! (3,3)
Zoom Notification oh look! (4,3)
Zoom Notification oh look! (5,3)
Zoom Notification oh look! (12,3)
Zoom Notification oh look! (13,3)
Zoom Notification oh look! (14,3)
Zoom Notification oh look! (15,3)
Zoom Notification oh look! (16,3)
Zoom Notification oh look! (3,4)
Zoom Notification oh look! (4,4)
Zoom Notification oh look! (5,4)
Zoom Notification oh look! (6,4)
Zoom Notification oh look! (12,4)
Zoom Notification oh look! (13,4)
Zoom Notification oh look! (14,4)
Zoom Notification oh look! (15,4)
Zoom Notification oh look! (16,4)
Zoom Notification oh look! (3,5)
Zoom Notification oh look! (4,5)
Zoom Notification oh look! (5,5)
Zoom Notification oh look! (6,5)
Zoom Notification oh look! (11,5)
Zoom Notification oh look! (12,5)
Zoom Notification oh look! (13,5)
Zoom Notification oh look! (14,5)
Zoom Notification oh look! (15,5)
Zoom Notification oh look! (3,6)
Zoom Notification oh look! (4,6)
Zoom Notification oh look! (5,6)
Zoom Notification oh look! (6,6)
Zoom Notification oh look! (9,6)
Zoom Notification oh look! (10,6)
Zoom Notification oh look! (11,6)
Zoom Notification oh look! (12,6)
Zoom Notification oh look! (13,6)
Zoom Notification oh look! (3,7)
Zoom Notification oh look! (4,7)
Zoom Notification oh look! (5,7)
Zoom Notification oh look! (6,7)
Zoom Notification oh look! (8,7)
Zoom Notification oh look! (9,7)
Zoom Notification oh look! (10,7)
Zoom Notification oh look! (11,7)
Zoom Notification oh look! (12,7)
Zoom Notification oh look! (13,7)
Zoom Notification oh look! (3,8)
Zoom Notification oh look! (4,8)
Zoom Notification oh look! (5,8)
Zoom Notification oh look! (6,8)
Zoom Notification oh look! (8,8)
Zoom Notification oh look! (9,8)
Zoom Notification oh look! (10,8)
Zoom Notification oh look! (11,8)
Zoom Notification oh look! (12,8)
Zoom Notification oh look! (13,8)
Zoom Notification oh look! (14,8)
Zoom Notification oh look! (3,9)
Zoom Notification oh look! (4,9)
Zoom Notification oh look! (5,9)
Zoom Notification oh look! (6,9)
Zoom Notification oh look! (8,9)
Zoom Notification oh look! (9,9)
Zoom Notification oh look! (10,9)
Zoom Notification oh look! (11,9)
Zoom Notification oh look! (12,9)
Zoom Notification oh look! (13,9)
Zoom Notification oh look! (3,10)
Zoom Notification oh look! (4,10)
Zoom Notification oh look! (5,10)
Zoom Notification oh look! (6,10)
Zoom Notification oh look! (8,10)
Zoom Notification oh look! (9,10)
Zoom Notification oh look! (10,10)
Zoom Notification oh look! (11,10)
Zoom Notification oh look! (12,10)
Zoom Notification oh look! (13,10)
Zoom Notification oh look! (4,11)
Zoom Notification oh look! (5,11)
Zoom Notification oh look! (6,11)
Zoom Notification oh look! (7,11)
Zoom Notification oh look! (8,11)
Zoom Notification oh look! (9,11)
Zoom Notification oh look! (10,11)
Zoom Notification oh look! (11,11)
Zoom Notification oh look! (12,11)
Zoom Notification oh look! (5,12)
Zoom Notification oh look! (6,12)
Zoom Notification oh look! (9,12)
Zoom Notification oh look! (10,12)
Zoom Notification oh look! (11,12)
Zoom Notification oh look! (12,12)

The full list of known notifications is available below, while all the known zoom notifications are on the right.

Notification title Notification body Explanation
Congratulations! You've activated desktop notifications. This notification shows up right after the user allows push notifications to be sent from xkcd.com.
xkcd notification system success Success: A notification about the new xkcd comic has been sent!
xkcd notification system notifications Notification: No new xkcd comic has been posted since the last notification.
xkcd notification system test This is a test notification. If you’re seeing this, the notification system is configured incorrectly.
community message board Have you seen my cat? Up to 7 cats can appear at predetermined positions around the comic's page occasionally. It is guaranteed at the time of this notification being sent that there is at least one cat on screen.
Cat Fact! Despite frequent media portrayal of giving milk to cats, adult cats are frequently lactose intolerant. Upon clicking any of the 7 cats, the cat will disappear and the user will receive one of these notifications.
Cat Fact! The animal closest to the cat family without actually being in it is the linsang.
Cat Fact! The first known cat video was recorded in 1894.
Cat Fact! Cats can detect the active ingredient of catnip, nepetalactone, at less than one part per billion.
Cat Fact! Cats under the age of six weeks generally do not show any response to catnip.
Cat Fact! The oldest known cat lived to an age of 38 years old. Her name was Creme Puff.
Cat Fact! Cats can jump up to six times their length.
Cat Fact! Unlike humans, cats are capable of drinking saltwater if necessary for survival.
Cat Fact! Disneyland is home to approximately 200 feral cats.
Cat Fact! Many domestic cats can reach a top speed higher than Usain Bolt's 2009 sprint speed record.
Cat Fact! Estimates place the number of cats on Earth somewhere between 500 million and 1 billion.
Cat Fact! No one knows the breed of Schrödinger's cat because no one ever asked him.
Cat Fact! Cats generally purr at frequencies between 25 and 150 Hz.
Cat Fact! Cats have the same number of vertebrae in their neck as humans - seven.
Cat Fact! Cat nose prints are distinctive in the same way as human fingerprints.
Cat Fact! Cats only require approximately a sixth of the light that humans need to see.
Cat Fact! The first cat video on YouTube was posted in 2005.
Cat Fact! A cat's resting heart rate is more than twice that of humans with similar levels of fitness.
Cat Fact! Only one cat has ever been to space.
Cat Fact! The richest cat in the world was Blackie, who inherited 12.5 million dollars in 1988.
Cat Fact! "Litter" is the collective noun for a group of kittens born together.
Cat Fact! "Clowder" is one of the multiple collective nouns for cats.
Cat Fact! "Clutter" is one of the multiple collective nouns for cats.
Cat Fact! "Pounce" is one of the multiple collective nouns for cats.
Cat Fact! "Glaring" is one of the multiple collective nouns for cats.
Cat Fact! "Kindle" is a collective noun for any group of kittens, even if not all born together.
Cat Facts Meow!
Cat Facts Meow Meow!
Cat Facts Meow Meow Meow!
Cat Facts Meow Meow Meow Meow!
Cat Facts Meow Meow Meow Meow Meow!
Cat Facts Meow Meow Meow Meow Meow Meow!
Cat Facts Meow Meow Meow Meow Meow Meow Meow!
Cat Facts Meow Meow Meow Meow Meow Meow Meow Meow!
xkcd Weather Notification System Click here to get weather notifications!
Weather Notification Setup Wizard Now determining your location! Don't worry, this shouldn't take too long.
Please choose your location Are you in Albany? Click here to set your location to Albany.
Please choose your location Ok, are you in Atlanta? Click here to set your location to Atlanta.
Please choose your location Ok, are you in Boise? Click here to set your location to Boise.
Please choose your location Ok, are you in Boston? Click here to set your location to Boston.
Please choose your location Ok, are you in New York City? Click here to set your location to New York City.
Please choose your location Ok, are you in Saint Louis? Click here to set your location to Saint Louis.
Please choose your location Ok, are you in Anchorage? Click here to set your location to Anchorage.
Please choose your location How many more cities can there be?! Uh, ok, are you in Idaho Falls? #3rd to last
Please choose your location [getting desperate] Are you in Newport News, VA? #2nd to last
Please choose your location [increasingly desperate] Fargo???? #last
Weather location selected I'm sorry! That's all the cities I know! Oh no. What do we do?? Uhhh. Setting your location to MOUNT WASHINGTON SUMMIT, NEW HAMPSHIRE. If the user didn't interact with any of the "choose your location" notifications, this notification will eventually show up.
Weather Information You are subscribed to weather reports for (City) After selecting a location, the user will receive this notification with (City) substituted with the city they chose.

If the user had waited until Mt. Washington was automatically selected as a fallback option, (City) will be substituted with MOUNT WASHINGTON SUMMIT, NEW HAMPSHIRE, in all caps. This pattern follows for the other notifications that reference the chosen (City) name.

Weather report from Albany KALB 092251Z 33010KT 10SM FEW060 FEW120 FEW260 04/M09 A3023 RMK A02 SLP241 ASCL DSNT W T00441094 Depending on the city you picked (see the "choose your location" notifications), the website will periodically send notifications containing METAR data. The weather station producing these data (the first 4 letters) is chosen depending on which city the user has selected.

Weather station codes selected for each city:

  • Albany: KALB
  • Atlanta: KATL
  • Boise:
  • Boston:
  • New York City:
  • Saint Louis:
  • Anchorage:
  • Idaho Falls:
  • Newport News, VA:
  • Fargo: KFAR
  • MOUNT WASHINGTON SUMMIT, NEW HAMPSHIRE: KMWN

You can view historical METAR and TAF data of any station here.

xkcd News We’ve launched a Youtube channel for What If? videos!

Ring the bell, like, and subscribe!

Clicking this notification redirects the user to xkcd's What If? YouTube channel.
System Log (INFO): A user has paused notifications This notification is likely the result of a random other user clicking the "Silence Notifications at a Cost" button. According to the button's description, pressing it will temporarily pause notifications, but two other users will get this message instead.
Constant Reminders At the tone, Zero will be a Real Number
Constant Reminders At the tone, your favorite number will equal 14
Constant Reminders At the tone, The Golden Ration will equal half of 1 plus SQRT(5) This notification is a play on the concept of golden ratio, a popular and well-studied mathematical constant. (1+SQRT(5))/2 is the exact value of the golden ratio.
Constant Reminders At the tone, The Golden Ratio will equal half of 1 plus SQRT(5) There seems to be two versions of this notification, one with a "typo" (ration) and one without.
Constant Reminders At the tone, Pi will equal the ratio of a circle's circumference to its diameter.
Constant Reminders At the tone, Pi will equal half the value of Tau. While Tau can be defined independently, it is usually defined as 2 times Pi, which makes this notification a circular definition.
Constant Reminders At the tone, Theodorus' constant will equal sqrt(3)
Constant Reminders At the tone, The Silver Ratio will equal 1 plus SQRT(2) The silver ratio, also known as silver mean, is a geometrical proportion that indeed has the value of 1+SQRT(2). Its name derived from golden ratio, since both are the positive root of a certain quadratic equation.
Constant Reminders At the tone, Euler's Number will equal the limit from n to infinity of 1 plus 1 over n to the nth power
Constant Reminders At the tone, the luminosity of the sun will be L☉
Constant Reminders We are currently experiencing 3600±1 seconds per hour.

Changes to this rate will be announced 6 months in advance.

This is a reference to the standard Leap Second procedure.
Constant reminders The Earth is spinning at a rate of 1 rpd rpd stands for "revolutions per day", a unit for how fast something is spinning. A day can be defined as the length of time it takes for the Earth to complete one full revolution. Thus, saying that the Earth spins at 1 rpd is a circular definition.
How many times can you click this? You’ve clicked this notification 0 times Each click triggers another notification with the click count incremented. At each identified click count, the source changes to the corresponding text and remains there until the next threshold is reached, except for the "Super-special offer!" notifications. Clicking on a "super-special offer!" notification resets the click count to zero, but the click count will now increment at double the previous rate.
Hey you're pretty good at this... You've clicked this notification 10 times
You're really good at this... You've clicked this notification 20 times
Are you sure you want to keep going? You've clicked this notification 30 times
You're going to break something! You've clicked this notification 40 times
Super special offer! You've clicked 50 times. Click here to turn in those clicks to turn your future clicks into double clicks!
Upgrade! Enjoy your doubly good clicking.
You're breaking something! You've clicked this notification 50 times
You're breaking everything. You've clicked this notification 60 times
Stop! Please! You've clicked this notification 70 times
You're going to crash the system! You've clicked this notification 80 times
You've crashed the system. You've clicked this notification 90 times
Super special offer! You've clicked 100 times. Click here to turn in those clicks to turn your future clicks into double clicks!
Why? You've clicked this notification 100 times
Okay I kind of get it but... You've clicked this notification 150 times
Super special offer! You've clicked 200 times. Click here to turn in those clicks to turn your future clicks into double clicks!
There's no more notifications You've clicked this notification 200 times
You've clicked all the notifications You've clicked this notification 250 times
Okay just one more You've clicked this notification 300 times
Super special offer! You've clicked 400 times. Click here to turn in those clicks to turn your future clicks into double clicks!
You're just doing this to annoy me You've clicked this notification 500 times
Super special offer! You've clicked 800 times. Click here to turn in those clicks to turn your future clicks into double clicks!
You're just doing this to annoy you? You've clicked this notification 1000 times
Super special offer! You've clicked 1600 times. Click here to turn in those clicks to turn your future clicks into double clicks!
I guess it worked You've clicked this notification 2000 times
Super special offer! You've clicked 3200 times. Click here to turn in those clicks to turn your future clicks into double clicks!
Super special offer! You've clicked 6400 times. Click here to turn in those clicks to turn your future clicks into double clicks!
Super special offer! You've clicked 12800 times. Click here to turn in those clicks to turn your future clicks into double clicks!
Super special offer! You've clicked 25600 times. Click here to turn in those clicks to turn your future clicks into double clicks!
Super special offer! You've clicked 51200 times. Click here to turn in those clicks to turn your future clicks into double clicks!
Wow, You're really into this You've clicked this notification 1000000 times
Super special offer! You've clicked 102400 times. Click here to turn in those clicks to turn your future clicks into double clicks!
This is how you spend you time now? You've clicked this notification 10000000 times
Persistence is thy name You've clicked this notification 25000000 times
You're still here? You've clicked this notification 100000000 times A reference to the post-credits scene from "Ferris Bueller's Day Off".
It's over... go home... You've clicked this notification 1000000000 times
... You've clicked this notification 10000000000 times
Super special offer! You've clicked 439804651110400 times. Click here to turn in those clicks to turn your future clicks into double clicks!...
How many times can you click this? Whoops, did you mean to stop clicking these? We've given you a free click to keep you going. Click here to extend your streak of (N) clicks! Appears if you have a click count above zero but have stopped the chain of clicks. (N) is replaced with the current number of clicks you have. Upon clicking this notification, you are in fact given one free click. The source is whichever one is appropriate for your current click count.
Erroneous Alert ⚠️ Error: Too many errors
Erroneous Alert ⚠️ Error: Not enough errors
Erroneous Alert ⚠️ Error: It's too quiet.
Erroneous Alert ⚠️ Boop.
Erroneous Alert ⚠️ Error: I forgot whether I'm the server r the client
Erroneous Alert ⚠️ Error: I forgot whether I'm the server or the client
Erroneous Alert ⚠️ Kernel Panic: Kernel can't remember what number comes after 38 A kernel panic indicates an unrecoverable error in the operating system. Here, the kernel is described to "not remember" the sequence of numbers, a skill that is fundamental for machines. One can argue that failing to compute as a computer is a valid reason for a system-wide failure.
Erroneous Alert ⚠️ Error: Not enough extensions installed
Erroneous Alert ⚠️ Error: I received your request but decided to ignore you.
Erroneous Alert ⚠️ welcome datacomp
Erroneous Alert ⚠️ Error 40¾: HTTP error table corrupted. The error code "40¾" is displayed with Zalgo text for corrupted effect. Clicking on this notification sets the comic to the following image, where Cueball is seen shielding himself from a tentacle that has reached out from his laptop screen.3074 tentacles.png
Erroneous Alert ⚠️ Error 418: I'm a teapot. A reference to the Hyper Text Coffee Pot Control Protocol.
Erroneous Alert ⚠️ Your computer has encountered an error. Clicking on this notification will change the comic to the pane where the laptop is on fire.
Erroneous Alert ⚠️ The website has encountered an error.
Erroneous Alert ⚠️ Gravity malfunction. Clicking this notification will change the comic pane to one where Cueball, the desk, and the laptop are floating in the air.
Erroneous Alert ⚠️ Error: Website is dangerously overloaded. Click to empty computer ballast tanks. Clicking this notification will change the comic pane to a flooded one.
Erroneous Alert ⚠️ Error: Computer size limiter has encountered a problem. Click to deactivate it. Clicking this notification will make Cueball's laptop larger.
Comment and Subscribe Leave your thoughts in the comments below! Clicking this takes you to a seemingly random Wikipedia talk page.
An old xkcd comic has been posted Comic #11 was posted on 1 January 06 ISO 8601
An old xkcd comic has been posted Comic #301 was posted on 10 Aug 07
An old xkcd comic has been posted Comic #359 was posted on December 19 07
An old xkcd comic has been posted Comic #552 was posted on March 6 09
An old xkcd comic has been posted Comic #1062 was posted on 30 May 2012
An old xkcd comic has been posted Comic #1600 was posted on 11/06/15
An old xkcd comic has been posted Comic #1694 was posted on June 15 16
An old xkcd comic has been posted Comic #2369 was posted on 2020-10-07
An old xkcd comic has been posted Comic #3054 was posted on Feb 21 25
An old xkcd comic has been posted Comic #3062 was posted on Mar 12 2025
Carriage Return Line Feed The next station is Putney Bridge. Please mind the gap between the train and the platform.
Carriage Return Line Feed The next station is Barbican. Please mind the gap between the train and the platform.
Carriage Return Line Feed The next station is Fairlop. Please mind the gap
Current time The current time is five o'clock
xkcd.com This site has been updated in the background.
Word game Click here to enter a Notification Word
Word game Your word has been set to (word). This selection is permanent and can never be modified.
Word game Someone else has selected the word (word)!

Comic images

Image Transcript and explanation
3074 normal.png Cueball sitting at his desk, with his laptop.
3074 big laptop.png Cueball sitting at his desk, with a very large laptop.
3074 plant small.png Cueball sitting at his desk, with a small potted plant.
3074 pot squirrel.png Cueball sitting at his desk, with a squirrel in the pot.


3074 plant big.png Cueball sitting at his desk, with a much larger plant that has clearly outgrown the pot, at least vertically.
3074 big plant cat A.png Cueball sitting at his desk with the larger plant, with a cat on one of the branches.
3074 big plant cat B.png A second image of Cueball sitting at his desk with the larger plant with a cat on one of the branches, but in a different spot.
3074 Desk with Cat Foreground.png Cueball sitting at his desk, with a cat in the foreground near the point of view.
3074 cat chair.png Cueball sitting at his desk, his chair replaced with a large cat.
3074 computer fire.png Cueball sitting farther back from his desk, with the laptop on the desk on fire. This image also appears if xkcd.com is denied the permission to send notifications (see the explanation above).
3074 float.png Cueball, the desk, and the laptop floating in the air.
3074 spin.png Cueball spinning in his chair.
3074 desk sit.png Cueball sitting on the desk, facing the laptop on the chair.
3074 gameover.png The desk vacant with "Game Over" displayed if you use the emergency stop.
3074 sword.png Cueball sitting at his desk, with a laptop on the desk, and a sword leaning against the desk on the other side.
3074 swordfight.png Cueball and Ponytail swordfighting while the computer has an hourglass icon, referencing 303: Compiling.
3074 flooding.png The room flooded 2/3 of the way up the desk. Cueball is still sitting with his laptop.
3074 sailboat.png The same flooding, with a miniature sailboat behind Cueball.
3074 flooding cat.png The same flooding, with a cat face behind Cueball.
3074 Flooded Shark Fin.png The same flooding, with a shark fin on the far side of the desk, facing toward Cueball.
3074 longtable.png Cueball sitting at the desk, which has been extended behind his laptop like a long meeting table.
3074 nocueball.png No Cueball, only the chair, desk, and laptop.
3074 nodesk.png Cueball using the laptop on his lap, with no desk.
3074 squirrel on head.png Cueball with a squirrel on his head.
3074 squirrel.png A squirrel sitting at the desk, seemingly using the laptop.
3074 standing.png Cueball standing on top of the laptop keyboard.
gallery placeholder.png Cueball sitting at the desk, wearing a wizard hat.
3074 floor.png Cueball sitting on the floor behind the desk.
3074 tentacles.png Cueball sitting in his chair, shielding his face from a tentacle coming from the computer screen.
3074 tall chair.png Cueball sitting at his desk, typing on his laptop, while in an office chair raised to an excessive height – likely a reference to 2144: Adjusting a Chair.
3074 cat.png The cat that appears after returning to the comic window after leaving it idle for long period of time. It has a unique title text of ":3".