Keyboard Tester

What This Keyboard Tester Checks

The visual keyboard highlights active presses in real time and keeps tested keys marked, so you can quickly verify both registration and release behavior. It also tracks total tested keys and active keys to help spot repeatable failures.

Key Features

• Real-time keydown and keyup state tracking
• Mac and Windows modifier behavior support
• Full-size, TKL, 75%, and 60% form factors
• QWERTY, AZERTY, and QWERTZ layout conventions
• Resettable tested-key count and input history

Issues You Can Actually Confirm Here

• Dead keys: a specific key never lights up or logs when pressed.
• Stuck keys: keydown appears, but keyup does not clear the key state.
• Flaky repeats: one key works intermittently across repeated taps.
• Modifier path issues: combos like Shift+letter or Ctrl/Cmd+key fail while single keys pass.
• Zone-based failures: nearby keys fail together, which can indicate row/column or PCB trace faults.

Form Factors And Layout Conventions

This tester lets you switch form factors so the visual board matches what you actually use:

• Full-size: includes function row, navigation cluster, arrow keys, and numpad.
• TKL (Tenkeyless): removes numpad, keeps function row plus nav and arrow clusters.
• 75%: compact layout that keeps function row and arrows in a tighter footprint.
• 60%: removes function row and dedicated nav cluster for maximum compactness.

Layout conventions (QWERTY, AZERTY, QWERTZ) change legends and key positions, so test by physical key location and not only by printed keycap legends.