IdleTab

IdleTab

Screen tests for dead pixels, burn-in and backlight bleed, fixers to try afterwards, full screen colors, a screen that doubles as a fill light, steady noise to work under, and one prank. Pick one, set it going, and get on with what you were doing.

Everything runs in your browser. Nothing is uploaded, nothing is stored on a server.

Most used tools

Black ScreenDead Pixel TestWhite ScreenNoise GeneratorZoom Lighting

Screens

Black Screen

Pure black across the whole screen - blank a second monitor, or find the dust on the glass.

White Screen

A plain white field for spotting smudges, tracing on the glass and soft fill light.

Red Screen

Deep red, dimmed from the start, so your eyes stay adapted to the dark.

Green Screen

Chroma key green, in wide-gamut display-p3 where your browser supports it.

Blue Screen

A solid blue field for color checks, calm backdrops and blue chroma key work.

Custom Color Screen

Any color you pick or paste, filling the whole screen.

DVD Screensaver

A bouncing badge with your own text on it, and a counter for the corner hits.

Virtual Fireplace

A fire drawn frame by frame in your browser, with an optional crackle.

Virtual Aquarium

A fish tank drawn in your browser, with bubbles and slow light on the water.

Tests

Dead Pixel Test

Cycle your screen through solid colors to find dead and stuck pixels.

OLED Burn-in Test

Step through gray, color and pattern slides to spot burn-in and image retention.

Backlight Bleed Test

Fill the screen with pure black to find light leaking at the edges of an LCD.

Refresh Rate Test

Measure the frames your browser really draws, and read the rate in hertz.

Fixers

Dead Pixel Fixer

Flash fast color noise over a stuck pixel and give it a chance to clear.

Burn-in Conditioning

Cycle the whole screen slowly through color for hours to work on mild retention.

Lighting

Zoom Lighting

Turn a spare screen into a soft fill light, from warm 2700K to cool 6500K.

Sounds

Noise Generator

Generate white, pink and brown noise for focus or sleep.

Colored Noise

Explore blue, violet and gray noise across the spectrum.

Baby Sleep Sounds

Womb, shush, heartbeat, hair dryer and vacuum in one player, one tap each.

Womb Sound

A maternal heartbeat under a slow blood flow whoosh and a low bed.

Shushing Sound

Rhythmic shushing bursts at the tempo you set, or one steady hush.

Heartbeat Sound

A heartbeat from 60 to 150 BPM with a soft low bed under it.

Hair Dryer Sound

Bright fan noise with a motor whine, for a baby who settles to it.

Vacuum Sound

Deep vacuum cleaner noise, the sound parents reach for during colic.

Brown Noise

Deep brown noise for study sessions, with the evidence stated plainly.

Focus Timer

Work and break cycles with noise that fades at every change.

Sound Mixer

Layer up to five sounds, then save the mix or share it as a link.

Pranks

Hacker Screen

A prank terminal that fills with fake green code while you mash the keyboard.

If you are testing a screen

Five of the tools here are diagnostics, and they work best in a set order. Find the fault first, run the fix that matches it, then test again to see whether anything changed.

  1. Dead Pixel Test

    Cycle through solid colors to find dead and stuck pixels, and note where they sit.

  2. Dead Pixel Fixer

    Flash color noise over a stuck pixel to give it a chance to clear. A dead pixel gets no power, so it will not respond.

  3. OLED Burn-in Test

    Step through low gray slides and patterns to see whether an OLED shows ghosting or permanent burn-in.

  4. Burn-in Conditioning

    Cycle the whole panel slowly for hours to work on mild retention, then run the burn-in test again to compare.

  5. Backlight Bleed Test

    Fill an LCD with pure black to judge how evenly it holds a dark picture.

Frequently asked questions

What is on this site?

Full screen color pages, screen tests, two fixers, a screen fill light, noise generators and one prank screen. The tests look for dead pixels, OLED burn-in and backlight bleed.

Is it free, and is anything uploaded?

Free, with no account and no install. A tool here is your own browser painting colors on your own screen or making sound on your own device, so nothing is captured, uploaded or recorded. The only data kept is the preferences you set here, stored in this browser.

How do I test a screen for defects?

Start with the dead pixel test: it cycles solid colors so a dead or stuck dot stands out. Use the OLED burn-in test for ghosting, and the backlight bleed test for light leaking at the edges of an LCD. Each test ends on a page that explains what you saw and what to do next.

Do the tools need an account or an install?

No. Every tool runs on the page as it is, in any modern browser. You can install the site as an app if you want a shortcut and offline use, but nothing here depends on it.

Local history

Pinned and recently used tools are stored only in this browser. You can clear them anytime.