What these tools cannot tell you
A browser can only display patterns. Measuring gamma, white point, Delta E or exact response time needs a hardware colorimeter or a photodiode rig.
Frequently asked questions
How long should an OLED burn-in test run?
At least 30 seconds per colour. Burn-in shows as a faint ghost of previously displayed content and is easiest to see on solid mid-gray and solid colour fills.
Is banding on a gradient always a fault?
No. Many laptop and budget panels are 6-bit plus dithering, so mild banding is expected. Hard, wide steps that do not shimmer are more likely a driver or colour-profile issue.
Can a browser measure my monitor's accuracy?
No. A browser can only display patterns. Measuring gamma, white point or Delta E requires a hardware colorimeter.