What it detects
Whether expected multi-key combinations are reported together, which keys are missed, and whether extra unexpected keys appear.
Multi-Key Event Check
Keyboard Ghosting Test
Check whether selected key combinations reach your browser together. Save complete or incomplete snapshots, review missing and additional events, and retry combinations relevant to your use.
Additional Event Observation
Selected Combination Check
Gaming Key Combinations
Live Key Events
Select Test Mode
Choose combinations for your scenario. Use a physical keyboard; mobile virtual keyboards cannot perform real multi-key ghosting checks.
The test saves a snapshot as soon as all target keys are reported together. No hold time is required. For an incomplete attempt, record the best observed snapshot, retry, or skip.
Not Tested
Start focuses this area. Keys are captured only here; Esc pauses capture. Navigation, form controls and copy remain available.
What is Keyboard Anti-Ghosting?
Ghosting refers to an unintended extra key report; blocking refers to an expected key not being reported. This page records browser events, so missing or additional events must be checked against your actual actions. An incomplete snapshot alone does not identify a hardware fault.
Passing selected combinations does not establish full N-key rollover. Test the combinations you actually use and keep the browser/OS context with the result.
Browser Environment: May have additional limitations on simultaneous key detection
The test saves a snapshot as soon as all target keys are reported together. No hold time is required. For an incomplete attempt, record the best observed snapshot, retry, or skip.
How to interpret keyboard ghosting results
Multi-key tests are most useful when you understand the difference between missed keys, extra keys, rollover limits, and browser limits.
Use a physical keyboard on a desktop or laptop. Mobile virtual keyboards cannot hold the same key combinations and are not suitable for NKRO or ghosting checks.
Interpreting incomplete observations
Results describe browser events in selected combinations, not full NKRO or a hardware grade. Missing or extra events need confirmation: physical actions, focus, OS shortcuts and firmware can affect what arrives.
Laptop, mechanical, and external keyboards
Mechanical, laptop or gaming labels do not establish rollover capacity by themselves. Check the manufacturer’s specifications for the selected connection and mode, then repeat the combinations you actually need. Report only the combinations observed in that setup.
Browser and system limits
The browser only sees key events delivered by the operating system. Reserved shortcuts, focus loss, keyboard layout, USB HID mode, and Bluetooth connection quality can affect detection.
Mobile limits
Phone touch keyboards do not expose simultaneous physical key presses. Use mobile only for reading the guide unless you have a real external keyboard attached.
Keyboard Ghosting Test FAQ
Common questions about keyboard ghosting and anti-ghosting features
What is keyboard ghosting?
Ghosting refers to an unintended extra key report; blocking refers to an expected key not being reported. This page records browser events, so missing or additional events must be checked against your actual actions. An incomplete snapshot alone does not identify a hardware fault.
What is NKRO (N-Key Rollover)?
N-key rollover means the keyboard can report its keys in arbitrary simultaneous combinations. A few successful presets cannot establish that property for every combination. This test reports only the selected combinations it observed.
Why is anti-ghosting important for gaming?
Many games require pressing multiple keys simultaneously (e.g., WASD + Shift + Space). Anti-ghosting ensures all key presses are registered, preventing missed inputs during gameplay.
Do all mechanical keyboards have anti-ghosting?
Mechanical, laptop or gaming labels do not establish rollover capacity by themselves. Check the manufacturer’s specifications for the selected connection and mode, then repeat the combinations you actually need. Report only the combinations observed in that setup.
Why does my keyboard only support 6 simultaneous keys?
There is no universal six-key limit for USB keyboards. Reporting capacity depends on the device, report mode and firmware, and the browser also depends on OS delivery. A six-key preset or an incomplete attempt cannot establish the keyboard’s maximum.
Need More Help?
If you have questions about your keyboard's anti-ghosting capabilities, contact our support team.
Contact SupportKeyboard Guides & Resources
Go deeper with our expert guides - testing methods, troubleshooting, and buying advice.
Keyboard Ghosting Explained: Why Keys Vanish When You Press Many at Once
Why keyboards drop or invent keystrokes when you press several keys at once, what NKRO and anti-ghosting really mean, and how to test your own rollover.
Read guide →Gaming Keyboard Buying Guide: What Matters, What's Marketing
Which gaming keyboard specs actually matter — rollover, polling, switches, rapid trigger — which are marketing, and how to verify claims after buying.
Read guide →How to Fix Unresponsive Keyboard Keys
A practical troubleshooting guide for dead or intermittent keyboard keys — from software checks and cleaning to switch replacement — fix the real cause.
Read guide →