Methods, systems, and media for presenting a customized user interface based on user actions are provided. In some implementations, a method for presenting a customized user interface based on user actions is provided, the method comprising: receiving a request for media content from an application comprising a user interface for presenting media content that includes a plurality of user interface elements that each initiate sharing on a different platform; determining that the request was sent from the user device as a result of the user selecting a link on a first platform; and causing the application to present an additional user interface element that initiates sharing of the media content item on the first platform in addition to the plurality of user interface elements in response to determining that the request was transmitted as a result of selection of the link on the first platform.
