Keyboard Latency Test
Estimate time from a browser key event to the next painted visual update.
Browser input-to-display timing estimate
Press keys in the active zone. Each sample ends at the next animation frame callback.
What this page helps you test
This focused browser tool also answers searches such as: keyboard latency test online · keyboard latency tester · keyboard latency test list.
Guides for this tool
See how this check fits into real troubleshooting workflows.
If the result is not what you expected
Keep focus in the test
Input tests capture events only inside the clearly marked active area.
Try a direct port
Reconnect wired devices without a hub and retest the same control.
Compare another app
OS shortcuts and browser event filtering can hide otherwise working controls.
How it works
- Activate the test and press different keys at a comfortable pace.
- Each keydown is paired with the next animation-frame callback.
- Review the browser input-to-display timing estimate and sample distribution.
What this result cannot prove
- This is not end-to-end keyboard hardware latency.
- Refresh rate, scheduling, background load, and the operating system affect every sample.
Related tools
Frequently asked questions
Is the Keyboard Latency Test private?
Yes. Test input is processed in this tab and is not uploaded by this tool.
Why can browser results differ from another app?
Browsers, operating systems, permissions, device routing, and background load can all change what is exposed and measured.