Free tool
Viral score
checker
Paste your hook, clip idea or script and get an instant 0-100 viral score — why it works, why it doesn't, and exactly how to make it hit harder. Free, no signup.
Hook decides reach
The first line caps your views. We grade the opener hardest and tell you how to sharpen it.
Specific, not vague
Numbers, names and stakes beat generic claims. The score rewards concrete, the way the algorithm does.
Fixes, not just a grade
Every score comes with rewrite-level fixes you can paste straight back into your draft.
Questions? Answers.
Is the viral score checker free?
Yes — score any hook, clip idea or script free, no signup or credit card. It's the same AI that scores every clip Nova makes.
What does the viral score actually measure?
Scroll-stopping power. It weighs your opener's hook strength, curiosity gap, specificity, emotional stakes and payoff against what makes short-form content get watched and shared — then scores it 0-100.
Why does the first line matter so much?
On TikTok, Reels and Shorts the first 1-2 seconds decide whether anyone watches the rest. A weak opener caps your reach no matter how good the payoff is. The checker grades the opener hardest and tells you how to fix it.
Does Nova score the clips it makes?
Yes. Nova scores every clip it cuts from your videos and surfaces the highest-scoring moments first, so you publish the ones built to perform instead of guessing. Try it free.
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Stop guessing which clips will hit
Nova scores every clip it cuts from your videos and ships the highest-scoring moments first — free to start.
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