DLsite (ディーエルサイト), operated by the Japanese company EISYS, Inc. (株式会社エイシス), is an ecommerce storefront website and digital distribution service for downloading and selling a mixture of all-ages and adults-only doujinshi, doujin games, digital manga, light novel e-books, software, computer games, Android apps, and similar goods.

After selecting a display language, the site presents categories divided by audience and product type in order to wall off adults-only material.

In March 2003, DLsite partnered with Digital Media Mart (currently DMM.com) to create the doujin section of DMM.ADULT (predecessor of FANZA), which ended in August 2005.

[6] In March 2024, some creators reported that DLsite ordered them to change the description of their works to comply with policies from credit card companies.

[8] This service aims to allow DLsite to crowd-source translations for its materials in a way that directly supports creators in exchange for residuals or commission.