CPS Test – Kohi, Jitter & Click Speed Test
Measure clicks per second with multiple clicking modes.
Complete browser testing toolkit
Free Online Test Tools
Test speed, reaction, typing, device sensors, hardware, controllers, keyboards, displays, hearing signals and speakers through one organized browser-based collection.
Free access
3 focused categories
Responsive workspace
Choose a browser test
Every active CorrectionCopy test tool
This page stays aligned with the central active catalogue and gives every test workflow a distinct, centered pictographic icon.
Speed & Performance
Measure clicking, connection speed, reaction time, spacebar performance and typing accuracy.
Internet Speed Test
Measure download speed, upload speed, ping and jitter, then review connection guidance.
Reaction Time Test
Measure how quickly you respond to a visual signal.
Spacebar Counter
Count spacebar presses and measure space-bar speed with timed CPS challenges.
Typing Speed Test
Measure typing speed, accuracy and words per minute.
Device & Sensor Tests
Check device sensors, computer hardware, controllers, keyboards, mobile capabilities and physical scale.
Bubble Level
Use your device sensors as a digital spirit level.
Computer Hardware Test
Check key computer, browser, display and input functions.
Gamepad Tester
Test controller buttons, triggers, sticks, drift, deadzones, range and vibration.
Keyboard Test
Visualize key presses, key codes, repeats, rollover and possible ghosting in real time.
Mobile Hardware Test
Test phone sensors, screen, audio and device capabilities.
Online Ruler
Use a calibrated actual-size ruler in centimetres, millimetres and inches.
Audio & Display Tests
Screen color vision, inspect pixels, generate tones, estimate refresh rate and test speakers.
Color Blindness Test
Take an Ishihara-style color-vision screening with display checks and result guidance.
Dead Pixel Fixer
Locate stuck pixels and run a targeted rapid color cycle over the affected area.
Dead Pixel Test
Inspect monitors, TVs and phone screens with fullscreen solid-color test pages.
Hearing Age Test & Tone Generator
Test audible frequencies and generate precise audio tones.
Refresh Rate Test & UFO Motion Test
Estimate display refresh rate and inspect motion smoothness.
Speaker Test
Test left, right and frequency playback on speakers.
Popular browser tests
Start with a common device check
Open one of the most frequently used performance, hardware and display tests directly.
Simple testing guide
Run and interpret a browser test in three steps
Choose the correct test, prepare the device or environment, and interpret the result together with browser and hardware limitations.
Select the right test
Choose a performance, device, sensor, display or audio test that matches the function you need to inspect.
Prepare the environment
Close interfering apps, grant only required permissions, set suitable volume or brightness and follow the on-screen preparation guidance.
Repeat and compare results
Repeat important checks, compare another browser or device, and use manufacturer diagnostics or professional assessment when necessary.
One testing collection
Find all active speed, input, hardware, sensor, display and audio tests in one place.
Focused test workflows
Each page is designed around a specific device function, performance metric or inspection task.
Responsive access
Browse the full collection from desktop, tablet or mobile devices.
Transparent limitations
Tool notices and the Disclaimer explain browser, hardware and screening limitations.
Browser test results depend on hardware, permissions, browser support, calibration and environmental conditions. Screening tools are not diagnoses, and browser checks are not replacements for professional diagnostics. Review the individual tool notice and Disclaimer before making an important decision.
Test tools FAQ
Common questions
Quick guidance for selecting and using the browser-test collection.
Are the test tools on this page free to use?
The test tools in this collection are available without a direct use fee. Results can depend on your browser, device hardware, permissions, connection and environment.
Are browser-based hardware tests fully diagnostic?
No. Browser-based checks can confirm exposed functions and identify possible issues, but they cannot replace manufacturer diagnostics, professional repair tools or physical inspection.
Why can an internet speed result differ between tests?
Server distance, Wi-Fi conditions, background traffic, network congestion, browser limits and your internet plan can all affect download speed, upload speed, ping and jitter.
Can the color blindness and hearing tools diagnose a condition?
No. They provide informal screening and test signals only. Display calibration, ambient conditions, audio equipment and personal factors affect results. Consult a qualified professional for assessment.
Which tools help test a monitor or display?
Use Dead Pixel Test for solid-color inspection, Dead Pixel Fixer for a targeted rapid color cycle, Refresh Rate Test for motion analysis and Color Blindness Test for an Ishihara-style screening.
Why might a sensor, vibration or audio test not work?
Some browsers and devices do not expose every sensor or capability. Permissions, secure-context requirements, muted audio, unsupported APIs and hardware differences can limit a test.
Need help choosing a test?
Use the Help Center for troubleshooting, Contact to report a broken test, or Request a Tool to suggest a missing testing workflow.