It is generally not legal to download content from TikTok without the permission of the content owner. TikTok has terms of service that prohibit users from downloading or sharing content from the platform without the permission of the owner. Additionally, copyright law generally prohibits the unauthorized reproduction or distribution of copyrighted works.
However, there may be some exceptions to this rule. For example, under certain circumstances, it may be possible to download and use content from TikTok for the purpose of criticism, commentary, news reporting, teaching, scholarship, or research. These exceptions, known as “fair use” provisions, allow for the limited use of copyrighted material without the permission of the owner. Whether a particular use of TikTok content would qualify as fair use would depend on the specific circumstances and would need to be evaluated on a case-by-case basis.
It is important to note that even if a use of TikTok content is considered fair use, it may still be subject to the terms of service of the platform. Therefore, it is always a good idea to be aware of and comply with the terms of service of any platform you use