A conversion device includes an input unit configured to input position information of a user's line of sight on a screen; an acquiring unit configured to acquire, a character string included in a predetermined range from a position indicated by the position information, among character strings displayed on the screen; and a display control unit configured to display a list of character strings corresponding to readings including an input character as conversion candidates of the input character, among stored character strings, the list being displayed in response to the input character being input by the user. The display control unit increases a priority in a display order in the list for a character string that matches any of the acquired character strings, such that the priority is higher than that of a case where the character string does not match any of the character strings acquired by the acquiring unit.