Keyboard Latency Tester

### Is Your Keyboard Holding You Back? In fast-paced competitive gaming, every millisecond counts. Input lag—the delay between pressing a key and seeing the action on screen—can be the difference between winning a duel in CS2 or getting eliminated. Our Keyboard Latency Tester allows you to measure the responsiveness of your keyboard input pipeline right in your browser. While a browser-based test cannot measure the internal electrical processing of the keyboard PCB like a hardware probe, it provides a highly accurate comparative benchmark to see if your system, browser, or keyboard software is introducing unnecessary delay.

This tool is essential for gamers testing new mechanical keyboards, optimizing their "debounce" settings, or comparing the responsiveness of wired vs. Bluetooth connections.

### How to Test Your Input Lag 1. **Prepare Your Environment**: Close unnecessary background applications (Discord overlays, heavy downloads) to ensure the browser has full system resources. 2. **Start the Test**: Click the "Start Test" button to focus the capture engine. 3. **Tap Rapidly**: Tap a specific key (like Spacebar or Z) repeatedly and rhythmically. 4. **Analyze**: Watch the real-time graph. The tool measures the timing consistency and the interval between "keydown" events. 5. **Review Stats**: Look at the "Shortest Event Interval" and "Estimated Latency Class".

### Understanding the Metrics * **Polling Rate**: Gaming keyboards typically communicate with the PC at 1000Hz (every 1 millisecond). Standard office keyboards often run at 125Hz (8ms). If your shortest interval is consistently 8ms or higher, your keyboard might be stuck on a low polling rate. * **Scan Rate**: This is how fast the keyboard's internal processor checks the key matrix. Real 8000Hz keyboards (like Razer Huntsman V3) have incredibly high scan rates. * **Debounce Time**: A delay intentionally added by firmware to prevent one press from registering as two (chatter). High debounce settings (e.g., 20ms) make a keyboard feel sluggish.

### How to Reduce Keyboard Latency 1. **Use High Polling Rates**: Ensure your keyboard driver (Synapse, G Hub, iCUE) is set to 1000Hz or higher. 2. **Switch to Wired**: Wireless interference can add variable latency. Wired connections are the gold standard for stability. 3. **Enable Game Mode**: Windows "Game Mode" helps prioritize input processing over background tasks. 4. **Check Debounce Settings**: If your keyboard software allows it, set the debounce time to the lowest value that doesn't cause double-typing (usually 2ms-5ms).

### Frequently Asked Questions (FAQs) **Q: Can this tool measure my keyboard's exact hardware latency?** A: No software-only test can measure the exact time continuously from physical actuation to USB report without external hardware sensors. However, this tool measures the *consistency* and *system reporting speed*, which correlates strongly with how "snappy" a keyboard feels.

**Q: Why do I get different results in Chrome vs. Firefox?** A: Browsers handle input events differently. Chrome usually offers the lowest latency for input processing. We recommend using a Chromium-based browser for the most accurate benchmarks.

**Q: My keyboard is 1000Hz but feels slow. Why?** A: It could be your monitor's refresh rate (60Hz = 16.6ms visual lag) or V-Sync being enabled. Always disable V-Sync in competitive games.