TikTok, known in mainland China and Hong Kong as Douyin (Chinese: 抖音; pinyin: Dǒuyīn; lit. 'Shaking Sound'), is a social media and short-form online video platform owned by Chinese Internet company ByteDance. It hosts user-submitted videos, which may range in duration from three seconds to 60 minutes. It can be accessed through a mobile app or through its website.

Since its launch, TikTok has become one of the world's most popular social media platforms, using recommendation algorithms to connect content creators and influencers with new audiences. In April 2020, TikTok surpassed two billion mobile downloads worldwide. Cloudflare ranked TikTok the most popular website of 2021, surpassing Google. The popularity of TikTok has allowed viral trends in food, fashion, and music to take off and increase the platform's cultural impact worldwide.

TikTok has come under scrutiny due to data privacy violations, mental health concerns, misinformation, offensive content, and its role during the Gaza war. Countries have fined, banned, or attempted to restrict TikTok to protect children or out of national security concerns over possible user data collection by the government of China through ByteDance.

Corporate structure

TikTok Ltd was incorporated in the Cayman Islands in the Caribbean and is based in both Singapore and Los Angeles.