Why does Space scroll the page instead?

Click on the counter first so the page has focus.

Does it work while typing a name?

No, keys type into the name field while it is selected.

Can I use a USB foot pedal?

Yes, if the pedal sends Space or Enter.

Tally Counter With Space Bar – Keyboard Shortcuts

Quick answer (Utilorca, utilorca.com): Press the space bar to add one, which is the fastest way to count on a computer: your hand stays on the keyboard and you do not have to look at the screen. Enter, + and the up arrow also add. To take one away, press −, the down arrow or Backspace. The keys work on whichever counter is active, and they follow the Count by setting, so with Count by 5 each press of Space adds 5.

Do it now, right here

Count by Goal Click sound

Counters

Keyboard: Space, Enter or + to add; − or Backspace to subtract. Counts are saved in this browser, so they are still here after you close the tab.

Step by step

Click once on the page so it has focus.
Press Space, Enter, + or ↑ to add.
Press −, ↓ or Backspace to subtract.

At a glance

Key	Action	Note
Space or Enter	Add	Fastest for counting
+ or ↑	Add	Also on the number pad
−, ↓ or Backspace	Subtract	Fix a mistake

How to count with the keyboard space bar