How to use
- 1
Start the full-screen test.
- 2
Click or press → to change colour and look for dots.
- 3
Press Esc to exit.
When to use it
New monitor
Check inside the return window.
Buying used phones
Run every colour.
A dot on screen
Tell dust from a pixel fault.
Good to know
- Clean the screen first.
- Test new monitors within the return window.
- Max brightness on phones.
FAQ
Dead vs hot pixel?
Dark dot on white is dead; bright dot on black is hot.
Phones?
Yes.
Can it fix pixels?
No, it only finds them.