What is Fake Broken Screen?

Fake Broken Screen is a prank simulator that creates realistic cracked glass effects on your screen. Simply click or tap anywhere to generate convincing crack patterns, complete with glass-breaking sound effects.

Whether you want to trick a friend into thinking they broke your phone, or just have some fun, this tool offers multiple crack styles and customization options to make the effect as realistic as possible.

Completely Safe: All effects are visual only — your screen is never actually damaged. Close the tab or press R to remove all effects instantly.

How It Works

The app uses HTML5 Canvas to procedurally generate unique crack patterns every time you click. Each crack is different — the lines branch out randomly, just like real glass fractures. The glass cracking sound is synthesized in real-time using the Web Audio API, so no audio files need to be downloaded.

How to Use

Basic Usage

Open the App

You'll see a dark screen with subtle glitch lines, ready for your prank.

Click to Crack

Click or tap anywhere on the screen to create a crack at that spot with realistic sound effects.

Add More Cracks

Keep clicking to add more cracks — they'll stack on top of each other for a more dramatic effect.

Reset When Done

Press R to reset and clear all cracks instantly.

Customizing Your Prank

Access Settings

Press Esc to open the settings panel and customize your prank experience.

Choose Crack Style

Select from Spider Web (radiating), Impact (heavy center), or Shattered (dense fragments).

Select Background

Choose Glitch (default), Black, White, or upload a custom image for maximum realism.

Audio & Effects

Toggle sound effects on/off and enable continuous glitch effect for damaged display simulation.

Setting Up a Prank

Use the Auto-Crack Timer to set up a delayed crack. Enter the number of seconds (1-60), press Start, and hand the device to your unsuspecting friend. After the countdown, a crack will appear automatically at a random location on the screen.

Pro Tip: For maximum effect, enable fullscreen mode and upload a screenshot of the victim's actual desktop or wallpaper as the background. They'll be completely convinced their screen is broken!

Features

Crack Styles

Spider Web

Classic fracture pattern with multiple thin cracks radiating outward from the impact point.

Radiating crack lines
Connecting stress arcs
Realistic web pattern

Impact

Simulates a heavy hit with fewer but longer and thicker cracks from the center.

Prominent impact zone
Thick crack lines
Heavy damage effect

Shattered

Dense network of short cracks creating a fragmented glass appearance.

Multiple fragments
Dense crack network
Extreme force simulation

Background Options

Glitch Effect

Dark screen with subtle green scan lines and flickering bars, simulating a damaged display (default).

Solid Colors

Choose between pure Black or White backgrounds for simple, clean crack effects.

Custom Image

Upload any image to use as the background — perfect for matching someone's actual wallpaper for ultra-realistic pranks.

Fullscreen Mode

Enable fullscreen for complete immersion and maximum prank effectiveness.

Sound Effects

Each crack triggers a synthesized glass-breaking sound using the Web Audio API. The sound is generated with a high-pass filtered noise burst that mimics real glass cracking. Sound can be toggled on or off in settings.

Sound Off

Visual Only

Silent crack effects
Good for quiet environments
Less convincing

Sound On

Full Experience

Realistic glass-breaking audio
Real-time synthesis
Maximum prank impact

Glitch Effect

Enable the persistent glitch overlay to add continuous visual distortion — random color shifts and flickers that make the screen look genuinely damaged. This effect runs independently of the cracks and can be toggled on or off.

Auto-Crack Timer

Set a delay (1-60 seconds) and the screen will crack automatically after the countdown. Perfect for setting up pranks before handing the device to someone.

Set Timer

Enter seconds (1-60)

Press Start

Activate countdown

Hand Over

Give device to target

Auto-Crack

Screen cracks automatically

Keyboard Shortcuts

`Esc`

Open or close the settings panel to customize crack styles, backgrounds, and effects.

`R`

Reset and clear all cracks from the screen instantly.

Frequently Asked Questions

Will this actually damage my screen?

Absolutely not. The cracks are purely visual effects rendered on the web page using HTML5 Canvas. Your actual screen is completely safe and untouched. Press R or close the tab to remove all effects instantly. No permanent changes are made to your device.

Why do the cracks look different every time?

Each crack pattern is procedurally generated using random algorithms. The number of branches, their angles, lengths, and sub-branches are all randomized to create unique results every time you click. This ensures that no two cracks look exactly the same, just like real glass fractures.

Can I use this on a phone or tablet?

Yes! The app works perfectly on all devices with a modern browser — smartphones, tablets, laptops, and desktops. Simply tap the screen to create cracks on touch devices. For the best prank effect, enable fullscreen mode to hide the browser interface.

How do I set up a prank for someone else?

Follow these steps for the perfect prank:

Open settings by pressing Esc
Upload their actual wallpaper as a custom background
Set the Auto-Crack timer to 3-5 seconds
Enable fullscreen mode
Hand them the device and watch their reaction

The screen will "crack" on its own after the timer runs out, making it look like they broke it!

Is my data private?

100% private. Everything runs entirely in your browser using client-side JavaScript. Uploaded images are only used locally in your browser's memory and are never sent to any server. No data is collected, stored, or transmitted. Your privacy is completely protected.

How are the crack patterns generated?

The app uses HTML5 Canvas and procedural generation algorithms to create realistic crack patterns. When you click, the algorithm:

Creates a main crack line from the impact point
Randomly branches off into sub-cracks at varying angles
Adjusts thickness based on distance from origin
Adds connecting stress lines for realism

The Web Audio API synthesizes the glass-breaking sound in real-time using filtered noise bursts.