What a virality predictor does
A virality predictor estimates how well a short video will perform before anyone sees it. It can't know your audience, the topic's timing or luck, so the useful part is what it can measure: whether the video itself is built to stop a scrolling viewer and keep them watching. That's what every short-form feed rewards first.
ViralGrader turns that into a viral score from 0 to 100 for each app you post to, a hook score for the opening seconds and a hold estimate for how many viewers stay to the end.
A prediction you can act on
A score on its own tells you whether to worry, not what to change. Every prediction here comes with an edit plan: each fix has the exact second and frame number and one instruction, like trim the first 1.2 seconds, cut a repeated shot, move the text up above the caption, or raise the first word. Make the edits, re-scan, and compare the old and new versions side by side.
Predicting virality on Reels, Shorts and TikTok
The same video can do better on one app than another, so the predictor scores each app separately:
- Instagram Reels: watch time and shares carry the most weight, and the caption and audio label cover the bottom of the video.
- YouTube Shorts: YouTube Studio shows how many viewers chose to watch against how many swiped away, so the opening matters most.
- TikTok: the For You feed tests a video on a small audience first, and whether people watch to the end decides how far it goes.
Virality predictor vs. virality checker
People use both names for the same kind of tool. "Predictor" stresses the forecast: how a video is likely to do. "Checker" stresses the review: what's wrong and what to fix. ViralGrader does both in one scan. If you want the full picture of what the scan covers, start with the virality checker.
Comparing tools? See how ViralGrader compares with the Higgsfield Virality Predictor, which scores clips of up to 15 seconds.
How accurate is a virality prediction?
No predictor can promise a video will go viral, and you should be wary of any that claims to. What the score does well is rank versions of your own work: of two cuts of the same video, the one with the faster hook and fewer dead stretches usually holds viewers longer. After you post, you can add your real views so your future reports are measured against your own normal.
For a step-by-step way to judge a video before posting, read will my video go viral?.