FC2 (founded July 20, 1999) is a popular Japanese blogging host, the third most popular video hosting service in Japan (after YouTube and Niconico) and a web hosting company headquartered in Las Vegas. It was the 11th most popular website in Japan overall (as of January 2018).

FC2 is a US corporation, and according to an interview article by representative Takahiro Rihiro published in the magazine "Yahoo! Internet Guide" May issue in 2006, as of 2006, It is run by two people, his brother Takahashi Takahiro and his younger brother Takahashi Riyo, with 17 full-time employees and approximately 30 part-time staff.^{[citation needed]}

FC2 Blog launched in October 2004 and celebrated its tenth anniversary in 2014.

On April 14, 2025, FC2 announced that it will close FC2 Web, its free website hosting service, on June 30, 2025, citing the aging of its system and server. The service, which was started in 2001, later closed on June 30, 2025, and the service moved to FC2 Website.

It offers free and paid various web services in various languages such as Japanese, including rental server, domain, blog, chat, access analysis, bulletin board, diary, access counter, SNS, etc.

The same ID and password can be used in the service of FC2.^{[citation needed]} It is characterized that service addition can be registered with one ID.

According to a survey by Nielsen in 2016, the number of PC users dropped to 8th in Japan (3rd from 2014 to 2015), and the number of users decreased.

Due to the decreasing number of users in the last few years of FC2 Web's life, new registrations for the service have ended.