Keyboard Tester
Test keyboard input, key chatter, simultaneous key presses, and Caps Lock entirely in your browser.
This tool only displays input events within the browser. There is no function to send or save key input contents or detection results to the server.
Connected keyboard information
Display only devices authorized by WebHID in your browser. No server transmission or external dictionary inquiries are performed.
Not yet acquired. If there are already authorized HID devices, they will be displayed automatically.
Simultaneous press detection
Chattering suspicion log
About this tool
You can visually check if each key on your keyboard is responding correctly, and if there are any repeated or simultaneous presses for a short period of time.
Features
- 100%, 75%, 60% keyboard with JIS/English layout
- Detection of press history, simultaneous presses, CapsLock, and suspected chattering
How to use
- Select the layout and keyboard size you are using.
- Press the actual keyboard and see the reaction on the screen.
- Check the history of suspected chattering and simultaneous pressing.
Limitations
- Key operations reserved by the browser or OS may not be obtained.
- WebHID device information is acquired only when the user allows it with a compatible browser.
Privacy: The key is determined within the browser, and the input history is not sent or saved to the Develop Tools server. WebHID information is obtained only after the user's permission.