Keyboard Latency Test
React to the on-screen cue and measure when the browser receives your keypress.
Input Reaction Bench
IdleGamer Latency & Rollover Monitor
Local history
Save a result to keep it in this browser. History holds your five most recent saved results for this test.
No saved results yet.
Keystroke Telemetry Log
| Key | Event Code | Event Latency | Hold Duration |
|---|---|---|---|
| Awaiting matrix activation... Press any key. | |||
Keyboard Snapshot
Live compare pack from your current matrix scan.
Matrix Heatmap Stats
Your switch press intensity map. Highlights your most heavily utilized switches.
Next Check
Press each key in turn, then check modifiers and safe multi-key combinations.
How to use the Keyboard Latency Test
How do I run a reaction round?
Start a round, wait for GO, then press a letter key. A press before the cue is a false start. Try several rounds in the same browser to get a feel for your usual range.
What do these timing numbers mean?
Reaction time includes your response, keyboard input delivery and browser scheduling. Browser event delay measures the gap between an event timestamp and the page handler. Measuring hardware latency on its own requires external timing equipment.
How do I check rollover?
Hold down keys you use together and check how many light up. Peak rollover shows the most keys registered together in this session. Try several combinations you actually use.