Keyboard delay test results
Press the same key several times at a steady pace and review the timing panel for average, fastest, and slowest browser event intervals.
Local testing only Start testing
Browser-based input timing estimate.
Keyboard Latency Tester
Use this keyboard latency tester to estimate key response delay in your browser and compare repeated key presses for possible input lag.
This page uses browser event timing only. It cannot replace certified hardware latency equipment.
Start testingKeyboard delay estimate
Keyboard delay estimate
Run the Keyboard Latency Tester
Shows average, fastest, and slowest key event intervalsUseful for spotting obvious browser-visible input lagDoes not claim true hardware latency
Inspection flow
Inspection flow
1. Full key pass
0/104Press every key in the selected layout until the progress reaches 100%.
2. Ghosting combos
0/4Hold each listed combo and confirm all keys appear together.
3. Chatter 10-tap check
0/10Tap Press a key ten times with normal pressure, then review possible chatter.
W + A + Shift + SpaceW + D + Shift + SpaceQ + W + E + RA + S + D + F
Live status
Test stats
0Tested keys
104Untested keys
0Pressed now
0Max simultaneous
0Possible issues
- Last key
- None
- Currently pressed
- None
Latency
Input delay estimate
0Samples
Press keysEstimated Hz
Press keysAvg interval
Press keysFastest interval
Estimated from browser key event intervals. This is not a certified hardware latency measurement.
Ghosting test
Rollover check
- Current pressed keys
- None
- Max simultaneous keys detected
- 0
Try common gaming combinations to check for possible ghosting.
W + A + Shift + SpaceW + D + Shift + SpaceCtrl + Shift + EscQ + W + E + RA + S + D + F
Diagnostics
Possible issues
- Possible chatter
- None detected
- Possible stuck keys
- None detected
These are browser-based estimates. Retest a suspicious key several times before treating it as a hardware fault.
Local report
Export results
Keyboard Tester Online Report ============================= Generated at: 2026-05-15T07:32:42.387Z Selected layout: Windows Full-size Browser / OS: Unknown browser on Win32 Tested keys: 0/104 Untested keys: 104 Untested key list: Esc, F1, F2, F3, F4, F5, F6, F7, F8, F9, F10, F11, F12, PrtSc, ScrLk, Pause, `, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, -, =, Backspace, Ins, Home, PgUp, Num, /, *, -, Tab, Q, W, and 64 more Max simultaneous keys detected: 0 Possible stuck keys: None Possible chatter keys: None Pass / fail checklist --------------------- All layout keys tested: CHECK No possible stuck keys: PASS No possible chatter keys: PASS Multi-key input detected: CHECK Issue summary: 104 layout keys were not tested; multi-key rollover was not meaningfully tested Notes: Browser-based estimate. Some hardware keys, Fn keys, media keys, and system shortcuts may not be detectable.
ChecklistAll keys: CHECKStuck keys: PASSChatter: PASS
How this keyboard latency test works
The tester records JavaScript keydown timestamps and compares intervals between repeated key events in the current browser session.
Keyboard response tester limits
This browser-based keyboard delay tester is useful for spotting obvious input lag, but it cannot replace certified hardware latency equipment.
When high keyboard latency matters
Input delay is most noticeable in games, fast typing, rhythm workflows, and repeated shortcut-heavy work.
Related tests: polling rate, chatter, and ghosting
Use the polling rate, chatter, and ghosting pages to separate timing inconsistency from multi-key or switch issues.
Help
Can a browser measure true keyboard latency?
No. A browser can estimate event timing after input is received, but it cannot measure the full hardware path like lab equipment.
Why do latency results change between tests?
Browser load, operating system scheduling, repeat settings, display refresh, and your tapping rhythm can all affect timing.