Free Monitor Tests — Complete Display Diagnostic Suite

Detect dead and stuck pixels with full-screen colour cycling on any monitor, TV, or screen.

Detect light leaking from edges and corners. Identify IPS glow vs true backlight bleed.

Test motion clarity at multiple speeds. Reveals sample-and-hold blur and pixel response trailing.

Find pixel trailing, dark smears, and overdrive overshoot. Optimise your overdrive settings.

Verify your monitor's actual Hz. Detect if 144Hz or 240Hz is truly running.

GtG speed check and overdrive calibration. Understand the real difference between GtG and MPRT.

Detect dirty screen effect, vignetting, and colour tinting across the panel.

Check black level depth and contrast ratio. Compare IPS, VA, and OLED performance.

Detect image retention and permanent burn-in on OLED monitors and TVs.

Visual pursuit input lag gauge. Understand the difference between input lag and response time.

See how colour and contrast shift at off-axis angles. Reveals IPS glow, VA washing, TN inversion.

Verify gamma 2.2 calibration. Identify shadow crushing, highlight clipping, and midtone errors.

Check primary colours, grey neutrality, and sRGB fidelity. Identify hue shifts and colour casts.

Detect patchy backlight zones on dark screens. Common on VA panels. Distinct from backlight bleed.

Check peak nit output and APL dimming behaviour on OLED and mini-LED displays.

Verify native resolution rendering and detect sub-pixel defects and scaling artefacts.

Check sub-pixel RGB alignment. Detect coloured fringing around fine lines and text.

Check for barrel distortion, pincushion distortion, and line linearity errors.

Check grey neutrality and D65 white point accuracy. Identify warm or cool colour casts.

Compare warm and cool presets and verify Kelvin output against the D65 standard.