All tools
Free online screen testing — display tests, solid color screens, and input device checkers. No downloads. Works on monitors, laptops, phones, tablets, and TVs.
Display tests
Display test center
Hub for dead pixel, uniformity, gradient, ghosting, HDR, and more customizable tests.
Open toolDead pixel test
Custom color sequence and cycle speed for stuck and dead pixels.
Open toolUniformity test
Grey fields, grid overlay, and crosshair for vignette and tint.
Open toolBacklight bleed test
Bleed preset — pure black with grid overlay for IPS glow.
Open toolRefresh rate test
Real-time Hz detection and motion block verification.
Open toolResolution checker
Screen size, DPR, color depth, and viewport readout.
Open toolScreen size calculator
PPI, physical dimensions, and area from diagonal + resolution.
Open toolAspect ratio calculator
Simplify ratios, resolve missing dimensions, and compare formats.
Open toolBurn-in test
OLED retention patterns — color bars and checkerboard.
Open toolGhosting test
Free monitor ghosting test online — screen ghosting, motion blur, and inverse ghosting.
Open toolHDR test
Peak brightness reference and dynamic range check.
Open toolColor blindness test
Free screen color separation check — hue plates and red-green / blue-yellow pairs for display QA.
Open toolRGB channel test
Pure primaries, per-channel ramps, and RGB bars for subpixel isolation.
Open toolFlicker test
Free monitor & PWM flicker test online — screen strobe check for OLED and LCD.
Open toolCrosshair test
1px dot, geometry, and alignment cross for monitor center QA.
Open toolSharpness test
Pixel grids, line patterns, and multi-font text for clarity checks.
Open toolTearing test
Fast-scrolling stripes to detect VSync-off screen tearing.
Open toolColor gamut test
sRGB vs Display P3 patches for wide-gamut verification.
Open toolBlooming test
Local-dimming halos on bright highlights against pure black.
Open toolViewing angle test
Off-axis color and contrast checks with guided position prompts.
Open toolColor calibration test
White balance, 24-patch color card, and skin tone references for monitor color accuracy.
Open toolGradient & banding test
Adjustable RGB and grey ramps with bit-depth simulation.
Open toolScreen colors
Input devices
Keyboard test
Virtual QWERTY layout with key code readout.
Open tool60% keyboard test
Compact 61-key ANSI layout tester for 60% mechanical boards.
Open tool75% keyboard test
84-key compact layout with F-row and arrows — no numpad.
Open toolTKL keyboard test
87-key tenkeyless layout with nav cluster and arrows.
Open toolFull-size keyboard test
Complete 104-key ANSI layout including numpad.
Open toolTyping test
Free keyboard typing speed test online — WPM and accuracy with 1-, 3-, or 5-minute timers and easy, medium, or hard practice.
Open toolKeyboard CPS test
Key presses per second — spacebar speed and tap benchmark in 1s–30s windows.
Open toolKeyboard polling rate test
Live key-event Hz estimate, peak readout, and scrolling polling graph.
Open toolKey chatter test
Detect double typing and switch bounce with adjustable interval threshold.
Open toolMac keyboard test
Command, Option, Control, and fn on a virtual Apple keyboard layout.
Open toolSpeaker test
Left/right stereo check, frequency sweep, sub-bass rattle, and phase polarity — free online.
Open toolSurround sound test
Free 5.1 / 7.1 surround channel check — click each speaker or run a sequence.
Open toolController test
Gamepad visualizer — buttons, sticks, triggers, drift, and vibration.
Open toolStick drift
Analog stick drift tester — rest check, jitter, deviation, and range trail.
Open toolMouse test
Double click test, polling rate (Hz), CPS, buttons, wheel, and pointer tracking.
Open toolDPI test
Ruler-based DPI calibration — real vs rated deviation.
Open toolMouse scroll test
Scroll wheel direction, tick delta, up/down counts, and event log.
Open toolMouse polling rate test
Live Hz estimate, peak readout, and scrolling polling graph.
Open toolCPS test
Clicks per second benchmark with 1s, 5s, and 10s windows.
Open toolMouse latency test
Per-click delay log with min, max, and average in milliseconds.
Open toolTouch screen test
Multi-touch grid, dead zones, and precision.
Open toolGaming calculators
eDPI calculator
Calculate effective DPI, cm/360°, and compare against pro player settings.
Open toolSensitivity converter
Convert in-game sensitivity between CS2, Valorant, Apex, and 12 more FPS games.
Open toolPrecision aim test
Click targets in the arena — score, accuracy %, and personal best after sens changes.
Open toolDevice Testing Guides
Laptop, phone, TV, and panel workflows · Return tips · Buying checklists
Laptop Screen Test
8-step verification · Panel comparison · Return standards · Parameter glossary
Mobile Screen Test
OLED burn-in check · Touch test · Panel comparison · Used phone tips
TV Screen Test
Mini LED halo · Backlight bleed · OLED burn-in · HDR evaluation
Monitor Screen Test
IPS / VA / OLED · PPI matching · Color calibration · G-Sync / FreeSync
OLED Screen Test
Burn-in detection · PWM flicker · ABL check · WOLED vs QD-OLED
LCD Screen Test
IPS bleed · VA ghosting · Mini LED halo · LCD vs OLED
