Tool category
Device Tools
Check device, display, browser, and compatibility details quickly.
Available tools
Dead Pixel Test
Cycle a display through solid colors and grid patterns in fullscreen to help locate stuck, dead, or bright pixels.
Screen Uniformity Test
Show adjustable neutral and color fields in fullscreen to inspect brightness, tint, and backlight uniformity across a display.
Color Banding Test
Render precise grayscale and color ramps so users can visually check a display for banding, clipping, and crushed tones.
Motion Blur Test
Animate configurable high-contrast targets at measured speeds to help compare display motion clarity and ghosting.
Refresh Rate Test
Estimate the active display refresh rate from animation frame timing and report stability, dropped frames, and measurement confidence.
Touchscreen Tester
Visualize simultaneous touch points, pressure where available, trails, edge coverage, and missed areas on a touch display.
Keyboard Tester
Highlight pressed keys on an interactive layout and inspect key codes, modifier states, repeat events, and rollover combinations.
Mouse Input Tester
Test mouse buttons, wheel directions, double-click timing, pointer movement, and browser-reported button mappings in one surface.
Mouse Polling Rate Test
Estimate mouse event frequency from high-speed pointer samples and chart polling consistency over a selected interval.
Gamepad Tester
Display connected gamepad buttons, axes, trigger values, dead zones, and vibration support using the browser Gamepad API.
Webcam Tester
Preview a selected camera locally and inspect available resolutions, frame rates, aspect ratios, facing modes, and track controls.
Microphone Tester
Monitor microphone input locally with a level meter, waveform, clipping indicator, channel count, and short playback recording.
Speaker Channel Test
Play labeled test tones, noise, and phase checks through left, right, and supported multichannel speaker outputs.
Audio Latency Tester
Measure approximate speaker-to-microphone round-trip delay with a generated pulse and clearly explain environmental limitations.
MIDI Device Monitor
Connect to permitted MIDI hardware and display live notes, controllers, channels, velocity, clock, and system messages.
Web Serial Terminal
Open a user-authorized serial device, configure common port settings, exchange text or hexadecimal data, and export the session log.
WebUSB Device Inspector
Inspect descriptors, configurations, interfaces, endpoints, and identifiers exposed by a user-authorized WebUSB device.
WebHID Device Inspector
List collections, report descriptors, usages, and live input reports from a user-authorized WebHID device without sending commands by default.
Bluetooth GATT Explorer
Browse services and characteristics exposed by a user-selected Bluetooth Low Energy device and read permitted values locally.
Vibration Pattern Tester
Build, preview, and copy vibration timing patterns on devices and browsers that support the Vibration API.
Device Motion Visualizer
Chart live acceleration and rotation-rate readings, show sampling frequency, and export a local motion recording as CSV.
Device Orientation Compass
Visualize browser-reported device orientation as a compass and tilt model with calibration guidance and support diagnostics.
GPS Accuracy Tester
Sample permitted geolocation readings over time and chart reported accuracy, drift, altitude, speed, and fix stability.
Ambient Light Sensor Tester
Display and chart illuminance readings when the browser exposes an ambient light sensor, with clear compatibility feedback.
Screen Wake Lock Tester
Request, monitor, release, and reacquire a screen wake lock while showing visibility changes and browser support status.
Storage Quota Checker
Report browser storage usage, estimated quota, persistence status, and per-storage breakdown where supported without reading user files.
Browser Storage Speed Test
Benchmark temporary IndexedDB write and read throughput at user-selected sizes, verify data, and remove test records afterward.
CPU Benchmark
Run short configurable browser-side computation tests, report timing and consistency, and avoid claiming hardware-grade diagnostic accuracy.
WebGL GPU Benchmark
Measure browser graphics performance with adjustable WebGL scenes and report frame time, throughput, and throttling trends.
WebGL Capability Checker
Inspect available WebGL versions, limits, precision formats, compressed textures, extensions, and renderer details exposed by the browser.
Media Codec Support Checker
Check browser decoding and encoding support for selectable audio and video codec, container, resolution, bitrate, and frame-rate combinations.
Camera Code Scanner
Scan QR codes and supported one-dimensional barcodes from a live camera or local image entirely in the browser.
Display PPI Calculator
Calculate pixel density, pixel pitch, and pixels per centimeter from a display's resolution and diagonal size.
Screen Dimensions Calculator
Calculate a screen's physical width, height, area, and perimeter from its diagonal size and aspect ratio.
Display Scaling Preview
Compare how interface elements and text map from logical pixels to physical pixels at common operating-system scaling levels.
Screen Ruler Calibrator
Calibrate an on-screen ruler against a bank card or entered display dimensions, then measure objects in millimeters or inches.
Monitor Viewing Distance Calculator
Estimate practical viewing-distance ranges from screen size, resolution, pixel density, and a user-selected visual-acuity assumption.
Projector Throw Distance Calculator
Calculate image width, diagonal, or mounting distance from projector throw-ratio specifications and selected aspect ratio.
Projector Brightness Calculator
Estimate screen illuminance and foot-lamberts from projector lumens, image size, screen gain, and configurable light-loss assumptions.
Battery Runtime Estimator
Estimate device runtime from battery watt-hours or voltage and amp-hours, average load, efficiency, and usable-capacity limits.
Battery Charge Time Calculator
Estimate charging time from battery capacity, initial and target charge, charger output, conversion loss, and taper allowance.
Power Bank Output Calculator
Convert a power bank's advertised cell capacity into estimated usable USB watt-hours and device charges at selectable efficiencies.
USB Power Budget Calculator
Add connected-device power demands and compare them with configurable USB, hub, charger, and port power limits.
USB Cable Voltage Drop Calculator
Estimate cable voltage drop, delivered voltage, and power loss from conductor gauge, length, current, and connector resistance.
PoE Power Budget Calculator
Plan a Power over Ethernet switch budget from port standards, powered-device loads, cable loss allowance, and total supply capacity.
UPS Runtime Estimator
Estimate backup runtime from UPS battery specifications, equipment load, inverter efficiency, power factor, and battery aging.
Device Electricity Cost Calculator
Estimate energy use and cost for multiple devices from active power, standby power, daily schedules, and entered electricity rates.
Multi-Device Charger Planner
Allocate a charger's shared port wattage across phones, tablets, and laptops and flag combinations that exceed entered port rules.
Charger Compatibility Checker
Compare manually entered charger profiles, connector types, and device input requirements to identify safe compatible power combinations.
SD Card Speed Class Checker
Match entered camera bitrate and recording mode with SD speed classes and explain C, UHS, Video, and application ratings.
Recording Storage Calculator
Calculate video or audio recording time and file size from bitrate, duration, track count, and available storage.
Surveillance Storage Planner
Estimate storage and network throughput for multiple cameras using bitrate, recording schedule, motion duty cycle, retention, and redundancy.
RAID Capacity Calculator
Calculate usable capacity, fault tolerance, storage efficiency, and rebuild exposure for common RAID layouts and mixed drive sizes.
Print Cost Calculator
Estimate ink or toner, paper, maintenance, and electricity cost per page and per print job from user-entered yields and prices.
Printer Resolution Calculator
Calculate required image pixel dimensions, achievable print size, and effective PPI from paper dimensions and source resolution.
3D Print Filament Calculator
Estimate filament length, weight, material cost, and spool remainder from volume or length, diameter, density, and price.
Wi-Fi Channel Overlap Planner
Plot manually entered nearby 2.4, 5, or 6 GHz networks by channel width and suggest lower-overlap channel choices without scanning hardware.
Thermal Throttling Test
Run a bounded browser workload over time and chart relative performance decline that may indicate throttling, with stop and cooldown controls.
Safe Area Inset Tester
Visualize CSS safe-area insets, display cutouts, rounded corners, orientation changes, and fullscreen behavior on the current device.