Chromecast is a line of digital media players that were developed by Google from 2013 to 2024. The devices, designed as small dongles, can play Internet-streamed audio-visual content on a high-definition television or home audio system. The user can control playback with a mobile device or personal computer through mobile and web apps that can use the Google Cast protocol, or by issuing commands via Google Assistant; later models introduced a navigable user interface and remote control. Content can be mirrored to video models from the Google Chrome web browser on a personal computer or from the screen of some Android devices.
The first-generation Chromecast, a video streaming device, was announced on July 24, 2013, and made available for purchase on the same day in the United States for US$35 (equivalent to $47.24 in 2024). The second-generation Chromecast and an audio-only model called Chromecast Audio were released in September 2015. A model called Chromecast Ultra that can display 4K resolution and high dynamic range was released in November 2016. A third generation of the HD video Chromecast was released in October 2018. The final models, called Chromecast with Google TV, were the first in the product line to feature an interactive user interface and remote control; a 4K version was released in September 2020, followed by a 1080p version in September 2022.