Win the first
3 seconds.
Upload a Reel, TikTok or Short. AI grades the opening that decides who swipes away, shows you why, and writes better hook lines.
- TikTok, Reels & Shorts
- Score out of 100
- Your video never leaves your browser
Hook scorecard · Glow Serum review
TikTok
A friendly face from frame one, but nothing on screen tells muted viewers why to stay past second two.
The six checks
- StrongScroll-stop (first frame)
A close-up of her face mid-laugh at 0s is hard to swipe past.
- StrongFace or product early
The creator is on screen from the very first frame.
- WeakOn-screen hook text
No text appears until 3s, so muted viewers get no reason to stay.
- Needs workCuriosity or promise
The serum appears at 2s, but nothing hints at a result or payoff.
- Needs workPace & movement
One static talking shot; only a small head turn by 1.5s.
- Needs workSafe zones
Vertical 9:16, but her chin sits in the bottom caption area.
Fix these first
- 1Put a large hook line on screen from 0s, e.g. “I tried this for 7 days”.
- 2Cut to the serum in your hand by 1s instead of 2s.
- 3Reframe so your face sits in the middle third, clear of the caption area.
Hook lines to test
- “I tried this serum for 7 days”
- “Day 1 vs day 7, no filter”
- “Why my skin stopped looking dull”
Put one on screen from the first frame, large and centred.
Three steps, no account.
Your hook scorecard in under a minute.
Upload your video
A Reel, TikTok or Short. Your browser reads only the first 3 seconds; the video file never leaves your device.
Get your hook score
AI checks the six things that decide whether people keep watching, and scores your opening out of 100.
Fix it before you post
You get the three edits that matter most, plus three hook lines written for your video.
How we score it.
Six checks on your first 3 seconds, weighted by how much each one keeps people watching.
Scroll-stop (first frame)
25 ptsWould the very first frame (0s) alone make someone pause instead of swiping?
Face or product early
15 ptsHow soon does a person or the product appear?
On-screen hook text
20 ptsIs there a short, readable text hook on screen in the first 1.5 seconds (most people watch muted)?
Curiosity or promise
20 ptsDo the first 3 seconds open a question or promise a payoff that makes viewers want the rest?
Pace & movement
10 ptsAcross the frames from 0 to 3 seconds, does the shot change, move or cut?
Safe zones
10 ptsIs the video vertical, with the face, product and hook text clear of the areas the app covers on this platform?
Good questions.
Why only the first 3 seconds?
That is where most viewers decide to stay or swipe. A strong opening is the biggest lever on watch time and reach, so this tool spends all its attention there.
How does the Hook Analyser work?
Your browser takes seven still frames from the first 3 seconds, one every half second. Our agent analyses them in order and grades six checks as strong, needs work or weak against fixed definitions. We turn those grades into a score out of 100 using fixed weights.
Do you store my video?
No. The video never leaves your browser, only seven small still frames do. They are sent to the AI for review and then discarded. We keep a fingerprint so the same video checked again within a week returns the same result.
Does it listen to the audio?
No. It judges what a muted viewer sees, which is how most people first meet your video. That is why on-screen hook text counts for so much.
Can a score predict views?
No score can promise views: the topic, timing and the rest of the video matter too. The hook score catches the opening mistakes that most often lose viewers in the first seconds.
Is it really free?
Yes. No sign-up and no card. There is a daily limit per visitor so the tool stays free for everyone.
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