Computer & Laptop Diagnostics
Diagnose screens, mechanical keyboards, gaming mice, stereo sound, gamepads, webcams, network speeds, and CPU/GPU hardware specs directly in your browser.
Display & Screen13 tools
Inspect panel integrity, color accuracy, refresh rate, and measurement tools.
Screen Testing
Screen & Dead Pixel Testโ
All-in-one display doctor: inspect dead & stuck pixels, color purity, panel uniformity, and backlight bleed.
Stuck Pixel Test / Fixerโ
Rapid RGB cycling noise generator to exercise stuck subpixels.
Color & HDR Testโ
Full RGBW/CMYK purity, wide color gamut (Display P3 / Rec.2020), and HDR dynamic range.
Gradient & Color Banding Testโ
Check 256-level smooth grayscale & RGB gradients to uncover color banding, 6-bit dithering, and stepping.
Contrast Testโ
Multi-step contrast wedges to calibrate dark & light levels.
Brightness Testโ
Evaluate dynamic backlight range and gamma curves.
Display Information
Screen Size / Aspect Ratioโ
Calculates native resolution, viewport bounds, and aspect ratios.
Refresh Rate Testโ
Real-time hardware frame rate monitor (60Hz, 120Hz, 144Hz, 240Hz).
Display Informationโ
Deep hardware telemetry: pixel depth, DPR, color gamut & orientation.
Measurement Tools
Screen Rulerโ
Calibrated physical ruler in centimeters, inches, and millimeters.
Pixel Rulerโ
Interactive drag-and-measure bounding box for screen pixel dimensions & distance.
Screen Magnifierโ
Interactive 2x-16x loupe magnifier to inspect subpixel RGB striping.
Online Protractorโ
Interactive 360ยฐ screen protractor to measure geometric angles.
Audio4 tools
Comprehensive acoustics testing for microphones, speakers, headphones, and audio tools.
Speakers & Headphones
Keyboard4 tools
Complete testing for mechanical, membrane, laptop, and gaming keyboards.
Keyboard Testing
Keyboard Testerโ
Interactive full keyboard layout with live keydown tracking and event log.
Key Rollover / NKRO Testโ
Test N-Key Rollover by detecting max simultaneous key registrations.
Stuck Key Testโ
Automatically flag keys held > 1.5s or stuck autorepeating phantom inputs.
Keyboard Latency Testโ
Measure physical keystroke debounce and hardware interrupt latency.
Mouse7 tools
Precision diagnostics for mouse switches, optical sensors, scroll wheel, and polling rate.
Mouse Testing
Mouse Button Testโ
Test Left, Right, Middle, Back, and Forward buttons with click counter.
Scroll Testโ
Verify scroll wheel smoothness, step counts, and deltaX / deltaY precision.
Double-Click Testโ
Diagnose mechanical microswitch switch chatter and unwanted double-clicks.
Click Speed / CPS Testโ
Benchmark your Clicks Per Second speed in 5-second and 10-second trials.
DPI Testโ
Calibrate and calculate true optical mouse DPI over a physical distance.
Polling Rate Testโ
Measure USB polling frequency in real-time (125Hz, 500Hz, 1000Hz, 4000Hz).
Mouse Latency Testโ
Measure click-to-render response time and cursor movement responsiveness.
Controller1 tools
Gamepad diagnostics for Xbox, PlayStation, Switch, and generic controllers via Gamepad API.
Webcam & Camera1 tools
Optical sensor testing, frame rate analysis, snapshot capture, and video recording.
Network5 tools
Benchmark internet speed, ping, jitter, packet loss, DNS, and IP addresses.
Network Information
DNS Testโ
Benchmark DNS resolution latency for primary domain queries.
IPv4 Testโ
Detect public IPv4 address, ISP carrier, and country location.
IPv6 Testโ
Verify IPv6 dual-stack connectivity and address assignment.
WebRTC Testโ
Probe WebRTC ICE candidates, STUN/TURN traversal, and media peer support.
System & Hardware12 tools
Inspect CPU, GPU, RAM, battery telemetry, and peripheral connectivity.
Device Information
Device Informationโ
OS version, platform architecture, user agent, and hardware specs.
Browser Informationโ
Rendering engine, browser release, and Web API capability matrix.
CPU Informationโ
Logical core count (`hardwareConcurrency`) and multi-thread benchmark.
GPU Informationโ
WebGL unmasked hardware renderer (NVIDIA, AMD, Apple, Intel) & shading limits.
RAM Informationโ
Approximate device memory (`deviceMemory`) and JS heap memory telemetry.
Display Informationโ
Color depth, pixel density, orientation, and screen resolution breakdown.
Connectivity
Bluetooth Testโ
Probe Web Bluetooth API and discover nearby BLE peripherals.
USB Testโ
Probe WebUSB API support and connect authorized USB hardware devices.
Connected Devicesโ
Enumerate connected audio inputs, audio outputs, and video cameras.
MIDI Testโ
Connect musical synthesizers and keyboards via Web MIDI API.