KEYBOARD DIAGNOSTIC

Keyboard Latency Test

Measure how long it takes a key press to reach your browser. The result is a local keydown delay, not a hardware certification.

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LIVE KEYBOARD DIAGNOSTICS

Press any key

Browser keydown delay

Last delay—

Median—

Average—

Samples0

Click inside the tester, wait for Ready, then press a key. The page records requestAnimationFrame-aligned delay from the previous frame to the keydown event.

This keyboard latency test reports browser event timing. It cannot measure switch debounce, firmware scan rate or true USB polling. Compare like-for-like sessions on the same machine.

WHAT IT CHECKS

Keydown delay, not a full keyboard map

People searching for a keyboard latency test usually want to know whether a board feels late in games or typing. This page isolates one number: the time from the previous animation frame to the keydown event after you press a key.

Single-key samples with auto-repeat ignored
Last, median and average delay in milliseconds
Local-only results that never leave the tab

HOW TO GET A CLEAN RESULT

Keep the comparison honest

Use the same browser, USB or Bluetooth path, and a quiet desktop session. Ten presses on one setup tell you more than one unusually fast sample.

Click the tester so the page has keyboard focus.
Press one key at a time after the ready prompt.
Compare a wired dongle against Bluetooth on the same computer.
Do not treat this as a replacement for a hardware analyzer.

Privacy by design: key events stay in your browser. Nothing is uploaded, and closing the tab clears the samples.

FAQ

Questions about this test

What does a keyboard latency test measure?+

This page records the interval between the moment you press a key and the moment the browser fires a keydown event. It is a browser-side delay, not a laboratory measurement of switch travel or USB polling.

Is this the same as a keyboard tester?+

No. A keyboard tester usually lights up every physical key. This keyboard latency test focuses on response delay for a single press so you can compare setups without turning the page into a full-matrix checker.

What is a good keyboard latency result?+

There is no official threshold. Wired mechanical boards on a quiet desktop Chrome session often land in a tighter cluster than Bluetooth laptop keyboards. Compare several presses on the same machine before changing hardware.

Why do results jump around?+

Display refresh, browser scheduling, USB hubs, Bluetooth, and background CPU work all affect when the event reaches JavaScript. Close extra tabs and keep the same connection when comparing sessions.