About Key Input Lab

What the site does

Key Input Lab provides a keyboard tester, a multi-key ghosting observer, a keyboard event viewer, a scroll-wheel test and a mouse accuracy test.

Honest browser-level results

The tools report browser events. They do not claim to diagnose hardware electronics, operating-system drivers or system-reserved shortcuts that never reach a web page.

Local-first tools

Keys, event logs, scroll deltas and click results are processed in your browser. There is no account and no server-side tool history.

For feedback or questions, visit the contact page.