A communication terminal includes an interface and circuitry. The interface communicates with a counterpart communication terminal to share data with the counterpart communication terminal that is input with first image data. The circuitry causes a display to display an image associated with second image data. The second image data is compressed data of the first image data. The circuitry further transmits, to a server, a capture image acquisition request that is a request for a capture image corresponding to the image associated with the second image data and displayed on the display. The server manages shared data to be shared with the counterpart communication terminal. The circuitry further receives, from the server, capture image data of an image associated with the first image data. The capture image data is acquired by the counterpart communication terminal in response to the capture image acquisition request.