Frequently asked questions
Can my phone's camera flash blink the message?
On most Android phones in Chrome, yes. Tick "Also use my phone's LED flash". iPhones do not allow websites to control the flash, so the screen is used instead.
More free screen lights and tools
Strobe & party
- Online Strobe LightTurn any screen into a flashing strobe light.
- Police LightsAlternating red and blue flashers with the classic double-flash pattern.
- Online Disco LightTurn your screen into a dance floor.
- Rainbow Color Changing LightYour screen glides through every color of the rainbow.
SOS & signals
- SOS FlashlightFlash the international distress signal (three short, three long, three short) with your screen.
Light modes
- Online Ring LightA soft ring of light for selfies, makeup and video calls.
- Video Call LightLook better on Zoom, Teams and Meet.
- Red Night LightDeep red light that does not ruin your night vision.
- Scrolling LED Text SignType a message and show it huge on your screen as scrolling LED text.
Relax
- Online Candle LightA warm, flickering candle glow with no flame and no smoke.
- Sunrise Wake-Up LightThe screen starts dark and slowly brightens like a sunrise over the time you choose.
- Online Lava LampWarm glowing blobs drift slowly across your screen like a retro lava lamp.
Color screens
- Dead Pixel TestFill your screen with solid colors to spot dead (always black) or stuck (always one color) pixels.
- White ScreenA pure white full screen (#FFFFFF) for lighting, cleaning your monitor, checking pixels or as a light box for tracing.
- Black ScreenA pure black full screen (#000000) to blank your display, save OLED battery, hide your screen or spot backlight bleed.
- Red ScreenA solid red full screen (#FF0000) for pixel testing, red mood lighting and night-vision friendly light.
- Blue ScreenA solid blue full screen (#0000FF) for pixel testing, chroma backgrounds and cool mood lighting.
- Green ScreenA solid green full screen (#00FF00) for pixel testing and a quick chroma-key background.
- Yellow ScreenA solid yellow full screen (#FFFF00), a warmer, softer alternative to white light.
- Orange ScreenA solid orange full screen (#FF8000) for warm, cozy light and pixel testing.
- Pink ScreenA solid pink full screen (#FF69B4) for flattering selfie light and mood lighting.
- Purple ScreenA solid purple full screen (#8000FF) for party and mood lighting.
- Gray ScreenA neutral 50% gray full screen (#808080) to check for uniformity, banding and dirty-screen effect.
Pranks
- Fake Blue Screen of DeathThe classic Windows XP "blue screen of death" crash, ready for an office or classroom prank.
- Fake Windows 10 Blue ScreenThe modern Windows crash screen with the sad face :( and a slowly rising "% complete" counter.
- Cracked Screen PrankMake it look like your screen is shattered.
- Hacker Screen SimulatorA green terminal that types endless "hacking" commands by itself.
- Fake Windows Update Screen"Working on updates… Don't turn off your computer." The percentage rises as slowly as you like.
- Fake Mac-Style Update ScreenA clean black installer screen with a progress bar and a "minutes remaining" countdown that you control.
- Radar ScreenA green radar sweep with fading blips.
Screensavers
- Bouncing DVD ScreensaverThe legendary bouncing DVD logo.
- Online Flip ClockA big, easy-to-read flip-style clock in your local time.
- Matrix Rain ScreensaverFalling green code straight out of the movies.
- No Signal Color BarsThe classic TV test pattern with a "NO SIGNAL" box.
- Motivational Quote ScreensaverInspiring quotes that fade in and out every few seconds.