A method and system. A first computer device determines one or more candidate character keys based at least on previous data entries of a form field in a web page received by the first computer device from a second computer device displaying a virtual keyboard with character keys displayed on a display screen in the second computer device. The first computer device removes one or more matching character keys from the one or more candidate character keys that match the displayed character keys in the virtual keyboard. The first computer device determines one or more supplement character keys of a supplemental keyboard based on character keys of the one or more candidate character keys that remain after the matching character keys have been removed from the one or more candidate character keys. The first computer device communicates the one or more supplement character keys to the second computer device.