Currently tiktok restricts it usage to mobile phones, however you can as well have acces to tiktok on your browser, following this tips below.
1. First you will need tp go to the official tiktok website, then - Click the Watch now button in the top right corner on the website
2. Now you will be able to use Trending or Discover section to browse for videos of your choice.
3. Once you have seen the video you wish to watch, just select the video to play.
Let me know if this was helpful.