# Display tests

Check your screen for dead pixels, backlight bleed and ghosting, and measure its refresh rate and resolution. Free, in your browser, nothing to install.

<https://setupcheck.app/display/>

The display tests look for faults and report your settings, so choose by what you see:

- **A dot that stays black, white or colored?** The dead pixel test fills the screen with one solid color at a time so faulty pixels stand out.
- **Light leaking at the edges, or cloudy patches on dark scenes?** The backlight bleed test shows black and dark gray, where leaks and glow stand out.
- **Trails behind moving objects?** The ghosting test moves shapes across black, gray and white so trails show.
- **Is it really running at 144 Hz?** The refresh rate test measures how often your browser draws the screen.
- **Which resolution and pixel ratio am I on?** The screen resolution tool shows your screen size, viewport and pixel ratio.

Test results stay on your device.

- [Backlight bleed test](https://setupcheck.app/backlight-bleed-test/): The backlight bleed test shows black and dark gray to reveal light leaks at the edges, IPS glow, clouding and blooming. No install needed.
- [Dead pixel test](https://setupcheck.app/dead-pixel-test/): The dead pixel test fills your screen with one solid color at a time, so dead and stuck pixels stand out. No install needed.
- [Ghosting test](https://setupcheck.app/ghosting-test/): The ghosting test moves shapes across black, gray and white so you can spot trails, halos, smearing and blur. No install needed.
- [Refresh rate test](https://setupcheck.app/refresh-rate-test/): The refresh rate test measures in Hz how often your browser redraws the screen, counts dropped frames and shows 30, 60 and full-rate motion side by side. No install needed.
- [Screen resolution](https://setupcheck.app/screen-resolution/): The screen resolution tool shows your screen size, viewport and pixel ratio, and follows every resize, rotation and zoom. No install needed.

Updated 2026-10-08

[en](https://setupcheck.app/display/) · [pl](https://setupcheck.app/pl/ekran/)