Hold several keys together and see which ones your browser receives. Check the combinations you actually use for games, shortcuts and everyday work.
Find out which key combinations reach your browser.
Hold several keys together. Try the combinations you actually use in games and shortcuts.
The maximum is the number of simultaneous keys observed on this page. Browser and macOS shortcuts may intercept keys. A high observed count does not establish full N-key rollover.
Hold a small group of ordinary letter keys, then add another key. Try your most-used combinations and release everything between attempts. The highest observed count describes this session’s browser events.
A combination that consistently omits a key is worth investigating. Try a different group of keys, another application and, if available, another connection. Some hardware matrices have combination-specific limits.
macOS shortcuts, browser commands, accessibility settings and connection behavior can hide keys from the page. A maximum count observed here does not certify the keyboard’s hardware rollover specification.
About the test, your keyboard, and that one key that won’t light up.
More answersRollover describes the keys a keyboard can register together. Browser tests show the events delivered to the page, which can also be affected by software and shortcuts.
Many Command combinations are browser or system commands. Use ordinary letter groups for testing and avoid shortcuts that close tabs or change application focus.
From missed keys to double taps. Find the right Mac keyboard test for the job.
Meet every key. Check your MacBook or Magic Keyboard, one press at a time.
Inspect key codes, modifiers and input-method composition events.
How fast can you tap? Give your spacebar a little workout.
Find your flow. Measure your typing speed and accuracy.
Tested in your browser. No accounts, no keystroke uploads, no fuss.
