What the fake broken screen is
This is a photograph, not a drawing, and that is the whole point. Broken glass has micro-crazing between the main fractures, edges that catch light along their whole length, and glass dust — none of which survive being drawn as lines, which is why every hand-drawn cracked screen reads as a spider-web doodle rather than as damage.
It is held at full bleed on black, so on a phone or a laptop with the screen dimmed it is very hard to tell from the real thing at arm’s length.
- A prank on a phone or a laptop belonging to someone with a sense of humour
- A prop screen for a film, a photo or a stage set
- A very effective way to make someone check their own screen
Cracked screen prank, no app to install
The crack pattern control mirrors, zooms and reframes the break, and the setting is stored in the address bar — so a particular one is a link you can send to someone. Severity below 1× pulls the damage back to a patch around the impact and leaves the rest of the panel clean; above 1× it lifts the fine cracks that sit close to black.
On a phone, add the page to your home screen so it opens without any browser interface. That is by far the most convincing way to run this one.
How to run it, and how to stop it
Press F for fullscreen, then F11 to hide the browser’s own toolbars. That second step is the one that matters: an address bar sitting above the screen gives the whole thing away instantly.
To end it: Escape leaves fullscreen, F11 brings the toolbars back, and closing the tab removes it entirely. Nothing is installed, no file is written and no setting is changed, so there is nothing to undo afterwards.
Worth saying plainly — use this on people who will find it funny, and on machines you are allowed to touch. Show them the way out once the joke has landed.