Test Your Monitor

Check your screen for alignment, sharpness, defective pixels, colour, and uneven brightness.

Individual tests

Choose a focused check when you do not need the full sequence.

How to use

  1. Select Start Full Test or choose an individual test.
  2. Use a mouse click, mouse wheel, or arrow keys to move between screens.
  3. Press Space to hide or show the guide, and press Esc to exit.
  4. Inspect the whole screen from a normal viewing distance and note any dots, uneven areas, or distorted shapes.

Troubleshooting

If colours, shapes, or brightness look wrong, check the display cable, monitor settings, resolution, scaling, and graphics settings, then run the test again.

Technical note

This browser test helps identify visible screen symptoms. It cannot repair pixels or guarantee the condition of the monitor.