Free Online Monitor Contrast Test - Checkerboard Calibration

Test keyboard functionality, detect ghosting, measure latency, check for stuck keys

Test Arabic keyboard layout and key response in an Arabic-first interface

Measure WPM, accuracy, and typing consistency

Test device and input latency in your browser

Count how many spacebar presses you can make in 5, 10, or 30 seconds

Measure your keyboard key repeat rate (Hz) and initial delay (ms) in your browser

Visualize your inter-keystroke timing patterns and get a rhythm consistency score

Classify your mechanical keyboard switches as linear, tactile, or clicky using mic FFT analysis

Find keys that register twice from a single press with configurable threshold and per-key stats

Estimate keyboard Hz using browser auto-repeat timing measurement

Press any key combination and instantly see what it does on Windows, macOS and Linux

Check mouse buttons, scroll wheel, cursor movement, and responsiveness

Measure your click speed (CPM or CPS) with timed tests

Test DPI, sensitivity, and tracking accuracy

Visualize mouse movement trails and precision

Detect unintended or phantom clicks

Check if your gaming mouse runs at 125Hz, 500Hz, 1000Hz or higher

Measure your gaming mouse lift-off distance to optimize sensor performance

Aim trainer benchmark — measure hit percentage, average pixel error, and reaction time per target

Measure drag-click CPS, peak burst rate, and total clicks with live timeline graph

Measure right-mouse-button CPS with browser context menu suppressed

Measure true mouse DPI by dragging a known distance or entering pixel and inch values manually

Calculate effective DPI (DPI x sensitivity) and cm/360 for CS2, Valorant, Apex and other FPS games

Detect idle cursor drift and sensor jitter with a 10s-3min pointer-event sampler and pass/fail verdict

Compare slow vs fast swipe pixels to catch Windows pointer acceleration or firmware-level sensor acceleration

Counts full 360° mouse rotations over 15/30/60 s with peak spins-per-second and direction indicator

Detect dead, stuck, or hot pixels on screens

Detect if your display runs at 60Hz, 144Hz, 240Hz or higher

Check color accuracy, gradient banding and backlight uniformity

Check your LCD monitor for backlight bleed, IPS glow, and clouding

Test for dead zones, ghost touches and multi-touch on phone or tablet

Check if your monitor uses PWM backlight dimming that can cause eye strain

Visual gamma calibration check using stripe-blend pattern, target sRGB 2.2

Detect pixel response time issues with adjustable-speed moving box on color backgrounds

Check shadow detail with 32 near-black patches, detect crushed blacks

Check highlight detail with 32 near-white patches, detect clipped whites

11-step grayscale ladder to verify brightness, contrast, and gamma calibration

Checkerboard vs 50% gray squint test for contrast and gamma calibration

Compute pixels per inch, dot pitch, aspect ratio and megapixels for any display from resolution + diagonal

Type any two of width, height, or ratio. Auto-simplifies to lowest integer terms and renders a live preview

Compute diagonal, width, height and visible area from aspect ratio plus any one dimension — in inches and cm

Optimal TV/monitor viewing distance by THX (36° FoV), SMPTE (30° FoV), and the 4K/8K resolving-limit

Live frame rate measurement with avg/min/max/1%-low plus 60/120/144/165/240Hz detection

Live readout of screen resolution, native pixels, device pixel ratio, color depth, and gamut

Cycle 8 solid colors, fine checkerboard, and scrolling refresher fullscreen to detect OLED burn-in

Detect Full RGB (0-255) vs Limited (16-235) via near-black and near-white patch grids

Fullscreen gray/black/white/RGB at any brightness to spot clouding, IPS glow, and backlight bleed

Detects dropped or skipped frames at your refresh rate with rAF timestamp analysis and a visual reference bar

Lagom-style 1px pixel grid, multi-size text samples, color-fringing blocks, and an RGB sub-pixel ruler to evaluate display sharpness

Check webcam quality, resolution, and snapshots

Use your webcam as a real-time virtual mirror with horizontal flip, brightness/contrast, grid, and snapshot

Verify microphone input and audio levels

Test stereo channels and sound output

Live dB SPL measurement using your microphone with peak and rolling average

Speaker and headphone channel verifier plus 100 Hz → 10 kHz frequency sweep

Subwoofer and low-frequency sweep (20 Hz → 200 Hz) with ISO 1/3-octave bass presets

Full-range 20 Hz → 20 kHz log sweep with hearing-limit logging and manual tone slider

Measure how fast you respond to a sound cue in milliseconds using the Web Audio API

5.1 and 7.1 channel walk-around to verify speaker wiring, with stereo panning fallback for headphones

Sing or play any note. Get live Hz, nearest note (C0-C8), octave, and cents off perfect pitch

Mosquito tone hearing test - 12 frequencies from 8 kHz to 22 kHz to estimate your hearing age

Extract text from images quickly

Scan QR codes with camera or image upload

Create custom QR codes instantly

Create strong, secure passwords instantly

Create clickable WhatsApp chat links

Create branded WhatsApp links and QR codes

Analyze chat sentiment and tone

Browse all hardware testing tools in one place

Detect IP address leaks through your browser even when using a VPN, IPv4 + IPv6 + local

Live X/Y/Z acceleration readout in m/s² with tilt ball, shake counter, and peak-g tracking

Live alpha/beta/gamma rotation readout with 3D cube, compass ring, and calibrate-to-zero

Phone haptics patterns (Vibration API) and gamepad rumble per-motor intensity in one tool

Multi-threaded WebWorker SHA-256 busy loop to load every logical core and report ops per second

Check WebGPU, WebGL2, WebNN and browser AI readiness with a safe matrix compute benchmark

WebGL2 Mandelbrot fragment shader benchmark that pushes any GPU and reports FPS, minimum FPS, and software-rendering fallback

Browser heap monitor with live performance.memory readout, allocation stressor, and safe auto-abort

Convert CAS latency (CL) and memory speed (MT/s) to real nanoseconds, compare DDR4 vs DDR5 kits side by side

Solve for transfer time, file size, or required speed - handles bits vs bytes math automatically

Estimate download duration for games, movies, and backups at your connection speed with realistic overhead

Usable capacity and fault tolerance for RAID 0/1/5/6/10/50/60 with side-by-side level comparison

Actual-size cm and inch ruler on screen with credit-card calibration (ISO ID-1) and DPI presets

Chat with the site's AI helper — it picks the right hardware test, links you to it, and explains the result in 8 languages

Test PS5, Xbox, Switch and PC controller buttons, stick drift and triggers

Measure how fast you react with a browser-based millisecond reflex test

Convert field of view across aspect ratios and games with presets for CS2, Valorant, Apex, CoD and Fortnite

Design a custom crosshair with live preview, PNG export, CS2 console command, and Valorant settings values

Actions-per-minute counter for RTS & MOBA players — live APM, peak, and session average

Random gamer names across 6 styles with length limits for Xbox, PSN, Steam, and Discord

Random MMO guild and clan names across 6 themes and 5 templates, with WoW/FFXIV/Destiny length limits

Time-to-kill math for FPS games with body vs head comparison, armor handling, and CS2/Valorant/Apex/CoD presets

Pixel circle, filled disc, thick ring, and 3D sphere layer plotter for Minecraft builders, radius 1-256