Testers & Widgets tools

Timers, typing tests and hardware diagnostics. Everything runs locally in your browser.

📖 New to testers & widgets? Read our Free Online Hardware Testers & Widgets: The Complete Guide to Testing Your Keyboard, Mouse, Screen and More for a full comparison of every tool below and which one to pick.

Aim Trainer
Train your mouse aim with three practice modes (precision, speed and tracking) and see your hit accuracy and reaction time, free in your browser.
Breathing Exercise Guide
A free guided breathing pacer with box breathing, 4-7-8 and coherent breathing presets, a visual pacing circle, a cycle counter and accurate timing.
What Browser Am I Using
See your browser name and version, operating system, engine, language and feature support, with a copy-report button for IT. Nothing is uploaded.
Online Chess Clock
A free two-player chess clock in your browser. Tap or press Space to switch turns, with bullet, blitz and rapid presets, Fischer increment and simple delay.
Countdown to Date
A free live countdown to any date or event, with days, hours, minutes and seconds, a fullscreen mode, and a shareable link. Runs in your browser.
Click Speed Test (CPS Test)
Measure your clicks per second with a free CPS test. Pick 1, 5, 10 or 60 seconds, click as fast as you can, and see your CPS, peak burst and best score.
Dead Pixel Test
Find dead or stuck pixels by cycling fullscreen white, black, red, green, blue, cyan and magenta screens with click or keyboard navigation.
Gamepad Tester
Test any game controller in your browser. Live button, trigger and stick readouts, stick-drift detection with adjustable deadzone, and a vibration test.
Hearing Frequency Test
Test what frequencies you can actually hear, from 20 Hz to 20 kHz, with per-ear checks and rough age-typical context. Free and private in your browser.
Interval Timer
A HIIT and Tabata interval timer with work and rest rounds, sets, presets, a colour-coded fullscreen display and sound cues. It all runs in your browser.
Keyboard Tester
Press keys and watch a 63-key on-screen layout light up. Read the code and key values, count how many keys are held at once, catch a stuck key.
Memory Test
Three escalating short-term memory challenges in your browser. Digit span with an estimated percentile, Simon-style sequences, and grid recall.
Mouse Tester
Check all five mouse buttons, scroll wheel direction and delta, double-click intervals and an estimated polling rate, live in your browser.
Noise Level Meter
Watch a live relative noise level from your microphone, with min, avg and max plus a classroom traffic light. Nothing is recorded, saved or uploaded.
Online Alarm Clock
Set an alarm for a clock time or a quick countdown, with a label, a choice of three sounds and a live countdown in the tab title. No sign-up.
Online Ruler
An on-screen ruler in mm, cm and inches, calibrated against a credit card or your screen size so the tick marks match real life. Free, nothing uploaded.
Online Timer & Stopwatch
A free countdown timer and stopwatch that survives a background tab, with a synthesised alarm, fullscreen clock and 5, 10, 25 and 60 minute presets.
Online Whiteboard
A blank drawing board with pen, highlighter, eraser, shapes and text, undo and redo, autosaved on your device and exported as a PNG or a PDF.
Pomodoro Timer
A 25/5 Pomodoro timer with long breaks, a two note chime, a countdown in the tab title and a daily tally kept in your own browser storage.
Reaction Time Test
Click when the box turns green, five times, and get your average, best, worst, a rating and an estimated percentile. Results stay in your browser.
Refresh Rate Test
Measure the frame rate your browser is getting, with a median-based estimate, dropped frame count and snapping to standard rates. Nothing is uploaded.
What Is My Screen Resolution
Read your screen resolution, live viewport size, aspect ratio, device pixel ratio, physical pixel estimate, colour depth and orientation in one panel.
Spacebar Counter
Count spacebar presses with no timer or against a 5, 10, 30 or 60 second window. Auto-repeat does not count, and best scores stay on your device.
Online Teleprompter
A browser teleprompter with ten scroll speeds, a font size slider, mirror mode for beam-splitter rigs and a 3-2-1 countdown. Your script stays on your device.
Touchscreen Test
Paint the screen to find dead zones, count simultaneous touches with live coordinates, and check tracking by feel. Runs in your browser, nothing recorded.
Typing Speed Test
Take a 1, 3 or 5 minute typing test with live per-character feedback, net WPM, accuracy and a local results history. No account and nothing uploaded.
Webcam and Microphone Test
Check your camera and microphone before a call. Live preview, measured resolution and frame rate, a level meter in decibels and a device picker.

Testers & Widgets tools in action

Screenshot of the Online Timer & Stopwatch tool with a countdown and stopwatch in one, with 5, 10, 25-minute pomodoro and 60-minute presets or a custom length, sitting ready at 25:00 with start, fullscreen and an end-of-timer sound — Online Timer & Stopwatch mid-process: a countdown and stopwatch in one, with 5, 10, 25-minute pomodoro and 60-minute presets or a custom length, sitting ready at 25:00 with start, fullscreen and an end-of-timer sound.

Screenshot of the Keyboard Tester tool with a full on-screen keyboard waiting for input, with a legend for untested, tested, pressed-now and possibly-stuck keys, a running count of the 63 keys tested this session, and readouts for the last key pressed and the keys held right now — Keyboard Tester mid-process: a full on-screen keyboard waiting for input, with a legend for untested, tested, pressed-now and possibly-stuck keys, a running count of the 63 keys tested this session, and readouts for the last key pressed and the keys held right now.