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About Speed and Reflex
Free tests for your clicks, reflexes and typing, and for your keyboard, mouse and screen.
What it is
Speed and Reflex brings together tests that gamers and anyone at a computer use: clicks per second, a click counter, a spacebar counter, reaction time, an aim trainer, a typing test, keyboard and mouse testers, white and black screens, a dead pixel test, a Discord timestamp generator and a block circle generator. They all run in your browser, with no sign-up. The site is also available in Spanish.
How the tests are checked
Each page explains how its number is worked out. The calculations (clicks per second, averages, words per minute, the circles) are checked automatically before every update against an independent program, and every test is run in the three browser engines (Chromium, Firefox and WebKit), on phone and computer screens, with simulated clicks, keys and a controlled clock.
What a web page can't measure
A browser can't read your mouse's DPI or polling rate, your screen's refresh rate or the delay of your devices, so the site doesn't show numbers it can't measure. Times include the delay of your screen, your devices and your browser.