A liquid discharge apparatus includes a conveyor, a discharger, a first mover, an output device, a second mover, and circuitry. The conveyor conveys an elongated web in a conveyance direction in a state in which tension is applied to the web. The discharger discharges liquid to the web conveyed by the conveyor. The first mover moves the discharger in a width direction intersecting the conveyance direction. The output device outputs position information of the web in the width direction. The second mover moves the output device in the width direction. The circuitry controls movement of the discharger based on the position information of the web. The circuitry controls movement of the output device based on information of a length of the web in the width direction and expansion-and-contraction range information of the web in the width direction to change a position of the output device in the width direction.