Free TV Test & Diagnostic Tools by TV Remote App

These free TV test and diagnostic tools let you check your TV, monitor, laptop or phone for the most common screen problems - dead pixels, backlight bleed, color banding and the wrong resolution or refresh rate - and check whether your remote is still working. They all run right in your TV browser, with nothing to install and nothing uploaded.

Dead Pixel Test

Check your screen for dead or stuck pixels with full-screen colors, and try the built-in stuck pixel fixer.

TV Remote Tester

Check if your TV remote is working - your phone camera sees the infrared flash even when your eyes cannot.

Backlight Bleed Test

Show a pure black screen to spot backlight bleed and clouding on an LCD, LED or QLED TV.

Screen Resolution Test

See your resolution, pixel density and refresh rate - is your TV really running 4K at 120Hz?

Color Banding Test

View smooth gradients full screen to check for color banding and 8-bit vs 10-bit color.

Audio Sync Test

Match a click to a bouncing ball to find your lip sync delay and fix sound that is out of sync.

Calibration Test Patterns

15 pro patterns - color bars, grayscale, black level, gamma, geometry and more - to set up your TV.

More test and diagnostic tools are on the way. These are the same kind of building blocks behind the TV Remote app - free for everyone, no strings attached.

Control your TV from your phone

One app for Roku, Fire TV, Samsung, LG, Android TV and more. No lost remote, no dead batteries.

Free TV Test & Diagnostic Tools

Test and diagnose the most common TV and screen problems - and check if your remote still works. No download, no sign-up.