#4u
The most viral posts using #4u across TikTok, Instagram, X, Facebook and Pinterest — ranked by real engagement tracked by ViralHunt.
We track 670 posts using #4u across 2 networks, carrying 483.5M engagement between them — an average of 721.6K per post.
It is used most on TikTok: 628 of the 670 posts we hold, 94% of the total.
And TikTok is not just where the volume is: it is also where the tag performs best per post, averaging 765.8K.
Ranking comes from the posts themselves rather than from how often the tag appears, and it is recalculated as new posts are collected. How we measure this →
Top #4u posts ALL NETWORKS
Filter by network, track every new post, and get alerts when #4u starts trending.
Most viral #4u on TikTok
See all 628 TikTok posts and track new ones live.
Most viral #4u on Instagram
See all 42 Instagram posts and track new ones live.
#4u in five questions
What is #4u and where is it used?
A hashtag with 670 posts tracked by ViralHunt across 2 networks, mostly on TikTok (628 posts). Those posts add up to 483.5M engagement, about 721.6K per post.
Where does #4u perform best?
On TikTok: 765.8K engagement per post on average, which is also where it is posted most.
When do people post with #4u?
Mostly on Tuesdays, around 05:00 UTC: 29% of the 670 dated posts fall in the three hours around that time. Posting when the tag is active is posting when someone is reading it.
Who uses #4u most?
brookemonk_ (TikTok, 564 posts), chavennmina (Instagram, 26 posts), seandreww (TikTok, 18 posts), keemokazi (TikTok, 13 posts), byneiseon (Instagram, 10 posts), algibraant (Instagram, 5 posts).
When people post with #4u
Hour of day and day of the week of the 670 dated posts carrying this tag (times in UTC). The busiest hour and day are marked.
Track #4u across every network
ViralHunt watches 13 networks live and shows you what's trending in your niche — before everyone reacts.
Try for free