The crying filter is popular in Tiktok nowadays, and many users had made videos in it due to which there are thousands of views in it. Similarly, it has also garnered thousands of likes on the videos.
Originally this filter was present on Snapchat, but now it is quite favored on the TikTok app. To get the crying filter on TikTok you need to have the Snapchat app. If you have it then it is okay otherwise download the app.
After downloading the app search the filter by pressing on the magnifying glass icon or search icon then type crying, and there will come the crying filter which you can use to make videos by using the filter.
So, this filter is not present on Tiktok, but you can use through the app Snapchat and later upload it to your Tiktok account.