Embodiments relate to generating application-processable commands from character strings. An aspect includes preparing a database in which are recorded keywords for presenting commands as conversion candidate objects, conversion candidate objects, and commands generated when a conversion candidate object has been selected. Another aspect includes receiving a plurality of character strings inputted by a user for an application. Another aspect includes converting a character string of the plurality of character strings to generate a completion candidate character string. Another aspect includes referencing the database when the character string includes a keyword, and presenting, to the user, completion candidate character strings and conversion candidate objects as a conversion candidate list. Another aspect includes generating a command corresponding to a selected conversion candidate object in response to selection of one of the conversion candidate objects from the conversion candidate list by the user.