Hardware Testing & Diagnostic Tools

Verify the status of your peripherals and display with free online tools. Test dead pixels, keyboard ghosting, gamepad drift, and battery health.

Lithium Battery Health Calculator

Calculate the State of Health (SoH) of your lithium battery based on cycles, voltage and temperature. Scientific guide to maximize energy longevity.

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Dead Pixel Test and Screen Repair Tool

Check if your monitor has dead or stuck pixels and repair them with our high-frequency strobe tool online.

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Touch Screen Tester

Draw on a full-screen canvas to test touchscreen dead zones, missed taps, edge response, palm interference, and how many simultaneous multi-touch points your phone or tablet can detect.

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Online Gamepad & Controller Test

Test your Xbox, PlayStation or PC controller. Visualize dead zones, joystick drift and buttons.

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Gamepad Polling Test

Measure the browser observed update rate, report interval and timing stability of a USB or Bluetooth gamepad.

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Online Gamepad Vibration Tester

Test the haptic motors and Dual-Rumble vibration of your gamepad in the browser. Supports Xbox, DualShock, DualSense and generic controllers.

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Online Keyboard Test & Ghosting Detector

Check if your keyboard suffers from Ghosting or Key Jamming. Real-time key visualizer and N-Key Rollover counter.

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Keyboard Chatter Test

Detect mechanical keyboard chattering, double typing, and faulty switch bounce by checking how quickly the same key appears twice.

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WebMIDI Keyboard Tester

Test a USB MIDI keyboard, synth, pad controller, pitch wheel, modulation wheel, note velocity, and stuck notes directly in the browser with Web MIDI.

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Online Mouse Polling Rate Test

Check the real Hz of your mouse. Verify if your gaming mouse works at 1000Hz or more with our professional tool.

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Mouse Double Click Test

Test every mouse button and detect unwanted double-clicks, worn switches, and contact bounce with per-button timing in your browser.

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Mouse Scroll Test

Diagnose mouse wheel skips, reverse jumps, inconsistent scroll direction, and weak encoder signals with a local browser-based scroll wheel test.

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Mouse DPI Analyzer

Measure your real mouse DPI online by moving the mouse a known physical distance and comparing the captured pointer movement in pixels.

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Mouse Jitter and Angle Snapping Test

Draw raw mouse traces online to spot sensor jitter, shaky tracking, and angle snapping or prediction that makes movement artificially straight.

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Online Tone and Frequency Generator

Generate sine, square, triangle and sawtooth waves. Test your speakers, headphones or subwoofer with frequencies from 20Hz to 20kHz.

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Water Ejector Speaker Cleaner

Play a low-frequency 165 Hz tone to help push water, dust or loose debris out of phone, tablet and laptop speakers.

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Subwoofer Crossover Test

Run a 200 Hz to 10 Hz sine sweep in your browser to find where your subwoofer fades, drops out, or hands off to your main speakers.

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Speaker Phase Tester

Play in-phase and 180 degree inverted stereo test signals in your browser to check speaker polarity, wiring mistakes, and phase cancellation.

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Microphone Test And Spectrum Analyzer

Test microphone input, live level, clipping, room noise, and frequency response locally in your browser with a private real time spectrum.

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Private Webcam Test

Check camera permission, live video, resolution, aspect ratio, orientation and observed frame delivery before a meeting or stream.

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Monitor Refresh Rate Detector

Instantly detect your monitor's refresh rate with precision using requestAnimationFrame. Test frame stability and compare with industry standards.

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Monitor Ghosting Test

Test monitor ghosting, motion blur, overdrive trails, and pixel response behavior with moving bars, text, and fullscreen motion patterns.

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Backlight Bleed and Blooming Test

Run a pure black fullscreen backlight bleed test and a draggable white local dimming blooming test for OLED, Mini LED, IPS, VA, monitors, laptops, and TVs.

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OLED Screen Burn In Fixer

Run a fullscreen OLED burn-in fixer and LCD stuck pixel exerciser with rapid RGB color cycles, white noise, a required photosensitivity warning, and a native timer.

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Color Accuracy Test: Spectrum Canvas

Calibrate your display with precision. Test sRGB and DCI-P3 color spaces, detect color shifts, measure accuracy with Delta E metrics, and generate professional calibration reports.

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UPS Runtime Calculator

Estimate UPS battery runtime, total protected load, usable watt-hours, and recommended VA size for PCs, monitors, routers, NAS devices, and home lab hardware.

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USB Power Budget Calculator

Check whether a USB port, charger, hub, cable, or USB-C PD profile can safely power your devices after headroom and cable voltage drop.

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Mobile Sensor Test

Run an online gyroscope, accelerometer, motion sensor, and bubble level test on your phone to check tilt, rotation, drift, and sensor calibration problems.

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Stereo Audio Test

Check left and right speaker channels, stereo balance, wiring direction, and headphone imaging with browser-generated test tones.

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Web Bluetooth BLE Scanner

Scan nearby Bluetooth Low Energy devices from the browser, inspect exposed GATT service UUIDs, and test whether your IoT or wearable hardware is discoverable.

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WebUSB Serial Monitor

Connect to USB serial hardware from the browser, read live terminal output, send commands, and debug Arduino, ESP32, RP2040, and maker boards without installing a desktop terminal.

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Input Lag & System Latency Test

Online hardware input lag and system latency measurement tool using high-precision performance timing and frame buffer synchronization.

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PSU Power Requirement Calculator

Estimate PC power supply requirements from component wattage, transient margin, growth headroom, and the power supply already installed.

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Resistor Color Code Calculator

Decode resistor bands into resistance, tolerance, range, and temperature coefficient, or work backwards from a target value.

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LED Resistor Calculator

Find the series resistor for an LED from supply voltage, forward voltage, and current, then pick the nearest E12 or E24 value and a safe wattage.

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Audio Delay Test

Test perceived audio delay on speakers, headphones, Bluetooth devices, and video playback with a local browser pulse test.

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Voltage Divider Calculator

Calculate a resistor divider output voltage, current, power dissipation, or the lower resistor needed for a target voltage.

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Ohm Law and Electrical Power Calculator

An Ohm law calculator for finding voltage, current, resistance, and electrical power from any two values you know.

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# Diagnostic Peripherals and Displays: Precision Without Software

Maintaining hardware no longer requires installing heavy diagnostic applications. In this section, we offer a suite of free online tools designed to test your components using native web APIs. From detecting LED panel fatigue to measuring polling rates of gaming peripherals, we apply standard testing protocols so you know the real state of your equipment.Our utilities are ideal for users who just purchased a product and want to verify its integrity, or for gamers seeking to optimize their competitive setup by detecting latency or accuracy failures.

# Visual Health: Dead Pixel Testing and Repair

A monitor with defective pixels can ruin your user experience. Our pixel test displays pure colors in fullscreen to identify dead pixels (black) or stuck pixels (locked in one color). Plus, we include a stroboscope optimizer designed to unstick subpixels through rapid chromatic frequency changes.

# Input Controllers: Keyboard (Ghosting) and Mouse (Hz)

For typists and FPS gamers, keyboard and mouse are vital. The ghosting test verifies how many keys your keyboard can register simultaneously (Rollover), while our Polling Rate tool measures your mouse's Hertz (Hz) in real time, ensuring stable and high-speed connection to your PC.

# Gaming and Consoles: Joy-Con Drift and Trigger Testing

Joystick wear (known as drift) is the most common failure in modern PS5, Xbox, and Switch controllers. Our controller simulator analyzes X/Y axes with floating-point precision, letting you visualize any unwanted movement or lack of dead zone in your sticks. It also lets you test haptic response and Dual-Rumble motor vibration through your browser.

# Power and Audio: Battery Health and Pure Tones

Lithium batteries degrade with each charge cycle. Our battery health estimator analyzes current cycles and residual capacity to predict how much useful life remains in your laptop or mobile device. On the other hand, our tone generator allows you to audit speakers and headphones by sweeping frequencies from 20Hz to 20kHz, detecting distortion or hearing loss in high ranges.

# Chromatic Calibration and Color Spaces: Professional Visual Precision

Monitors degrade. Factory color temperature (Kelvin), typically 6500K = D65 Daylight, changes over time. For graphic designers, photographers, and editors, this is catastrophic: you edit colors on a miscalibrated monitor, the work looks different on other displays, and the client rejects it. Deep calibration requires hardware (colorimeter costing €300-1000), but our color space test at least lets you audit whether your monitor maintains consistent gamma range (typically 2.2).Understanding sRGB vs. Adobe RGB vs. P3 is critical too. sRGB is web standard (sufficient for 99% usage), but Adobe RGB covers 40% more colors (necessary for professionals). A monitor covering only 70% sRGB will produce insufficient color saturation. Our tools let you audit without investing €1000 in professional equipment.

# Hardware Performance: Benchmarking and Bottleneck Detection

Gamers speak of "bottleneck" when GPU and CPU are unbalanced. A powerful GPU fed by a weak CPU never reaches its potential. The concept is simple: if the GPU waits for the CPU to finish, it's waste. Testing tools help diagnose: Is my problem the GPU or CPU? Do I need an upgrade? Or just reduce video settings?Latency tests are also critical for competitive gaming. Input-to-display latency (from pressing a button to seeing it on screen) can be 20-50ms on a decent setup, but 200+ms on a slow one. In competitive games (FPS, fighting games), 50ms is the difference between victory and defeat. That's why pro gamers invest in 240Hz monitors, 8000Hz mice, and optimized PCs.

# Lifecycle and Repairability: Digital Rights

"Repairability" is increasingly important in 2026. A "repairable" phone lasts 6 years; a "sealed" one expires in 2-3 years. A laptop with upgradeable RAM is an investment; one with soldered RAM is disposable. The diagnostic tools we implement align with the Right to Repair movement: we want you to know exactly what's broken before you discard your devices.Documenting the failure with our tools (screenshot of failed pixel test, video of drifting controller) is evidence for warranty claims. Many users lose money because they don't document, don't diagnose, just give up and buy new. Our utilities democratize technical information: now you can argue with proof.

# The Future of Wearable Hardware 2026

In 2026, the line between operating system and browser has blurred. Thanks to standards like Web Serial and WebUSB, we can perform diagnostics that previously required specific drivers. These tools are part of a movement toward the right to repair and user technical sovereignty over their own devices.