Turn your compact keyboard into a keypad layer.
NumFn is a lightweight menu bar app for MacBooks and compact keyboards. Hold Fn and use your left-side keys for numpad-style numbers and operators.
Direct macOS download available now. Key remapping stays local to your Mac.
Hold Fn. Type numbers. Let go.
Your regular keys stay normal until you hold Fn. Then NumFn sends keypad-style input for numbers and operators.
Just hold Fn and type.
In normal mode, your keyboard behaves as usual. Hold Fn to switch the left-side keys into a numpad layer. Release Fn and you are back to regular typing.
Two presets
Start with Numbers or Numpad, then adjust the layout when you need something different.
Local remapping
Hold Fn. These keys become your numpad.
While Fn is held, the highlighted keys send real keypad input. Release Fn and the keyboard types normally.
Numbers Only preset shown.
Private by design, no telemetry.
NumFn does not collect personal data, analytics, telemetry, tracking data, keystroke logs, or keystroke transmission.