A little play.
A sharper baseline.
Test your reflexes, recall a pattern, solve today’s grid or inspect your setup. Short browser challenges with clear rules and honest results.
Curiosity, meet a quick test.
Practice against your own history. Explore what the numbers mean.
Reaction Time Test
Measure five visual reactions in milliseconds. Track your average and fastest round on your own device.
Reflex & speedCPS Test — Clicks Per Second
Test your clicking speed over 1, 5, 10 or 60 seconds. See total clicks, CPS and your rhythm throughout the run.
Reflex & speedSpacebar Speed Counter
Count deliberate Space presses over 5, 10 or 30 seconds. Holding the key does not add repeated hits.
Reflex & speedBrowser Aim Trainer
Hit 30 targets in your browser. Compare time per target and accuracy with three target sizes.
Reflex & speedTyping Speed Test — English & Code
Measure net WPM, raw WPM and accuracy with English words or JavaScript, Python and SQL snippets.
Reflex & speedChimp Test — Working Memory
Remember numbered squares, then select them in order after their labels disappear. Start with four numbers and three strikes.
Memory & recallVisual Pattern Memory Test
Recall a briefly lit pattern. Work from a 3 × 3 board toward larger grids and keep track of your completed levels.
Memory & recallNumber Memory Test
Memorize a growing digit string, wait for it to disappear, then type it back exactly.
Memory & recallSequence Memory Test
Watch a growing sequence on a 3 × 3 board, then repeat the order. Each successful round adds one step.
Memory & recall2048 — Dark Mode Logic Grid
Merge matching tiles with arrows, WASD or swipe. Resume your saved board and use one undo per game.
Daily logicMinesweeper Pro
Clear beginner, intermediate or expert boards with safe first openings, flags and chording.
Daily logicDaily Queens Puzzle
Solve one unique daily grid: one queen per row, column and colored region, with no touching queens.
Daily logicMouse Double-Click Interval Tester
Inspect intervals between mouse presses and flag events less than 80 ms apart. Use slow isolated clicks to investigate repeats.
Hardware testsMouse Polling Rate Checker
Estimate the rate of mouse motion samples delivered to this browser, including coalesced events where available.
Hardware testsKeyboard Ghosting & Rollover Test
See received keyboard codes, held combinations and the maximum number of simultaneous keys observed by your browser.
Hardware testsDead Pixel & Refresh Rate Test
Inspect solid monitor colors in fullscreen and estimate the animation-frame cadence your browser observes.
Hardware tests