Sometimes when a keyboard wears out, some of its keys stop working. In those cases, you can still continue to use the keyboard by remapping the broken keys to some other keys that you no longer use or use very seldom. For example, if your F key is broken, you can remap F7 key to type F instead.
There could be one hundred and one reasons for why you would want to remap your keyboard keys, but no matter what the reason is, you can achieve the remapping using a free software called KeyMapper. It is a portable application and does not require any installation.
When you launch KeyMapper, it displays a full keyboard with all the keys along with the numpad. In order to map a key to something else, you can click on that key. It will display a small window that shows you all the options for mapping that key. You can select the target key from a number of groups such as commonly used, lock keys, media keys, modifier keys, web keys etc.
As you select one of these key groups, it displays all the keys from that group. Once you have selected one of the keys, you can simply click on the Map button. This will map the original key to take the selected action. in the following screenshot, we have selected the N key and we are mapping “Browser Homepage” key to it. After we are done mapping, pressing N will open home page in the default browser.
According to the developer of KeyMapper, it has been designed using the key scan codes for Windows 7. But it can still be used on Windows 10 or even Windows 11. I tested it on Windows 10 64-bit and it seems to work very well for all sorts of key mappings.
You can download KeyMapper from https://github.com/stuartd/keymapper.