Spacebar Test — Count Your Space Bar Presses
Press any key and watch it light up on an on-screen keyboard: check every switch, count simultaneous keys and spot dead or chattering keys.
Processed entirely in your browser — nothing you enter here is ever uploaded.
Result
About this tool
This page opens the keyboard tester with the spacebar counter highlighted: every hit on the space bar lights the on-screen key and increments the dedicated counter, so you see exactly how many presses register.
The spacebar is the most-used key on the board and usually the first to fail: it can start double-typing (chatter), register only when hit in the center, or stop responding on one side because a stabilizer wore out. Tap it in the middle, on the left and on the right edge, and compare the counter with the number of physical presses you made.
The tester intercepts Space during the test so the page does not scroll, and everything runs locally in your browser through standard keyboard events — nothing is recorded or sent anywhere.
Example. Pressing the A key lights that key and appends its code to the press history, while a held key does not add extra counts because auto-repeat events are ignored.
Limit. The history line keeps only the latest 24 presses, and Tab, Space, quote, backtick, and F1 through F12 are swallowed so the page does not follow them.