Find the exact second your clip loses people.
Scrollproof reads your short video frame by frame — Hook, Hold Rate, a second-by-second attention curve and a real attention heatmap — so you fix the weak seconds before you post, not after.
Most clips lose before they're seen.
The scroll is a reflex. Your opening second has to interrupt a departure that's already in motion — and most videos quietly fail it.
- Attention is won in the first second. Miss it and the rest of your edit never gets watched — the thumb is already gone.
- You can’t judge your own hook. You’ve seen the clip 40 times. Your brain supplies patience a first-time viewer will never have.
- You only find out after you post. By then it’s scored by the algorithm, not by you — and it’s too late to recut.
Scrollproof reads the one thing you control before you publish: whether the clip is built to stop the scroll.
Three steps. About a minute.
Drop your clip
Upload a vertical or horizontal video, 15 seconds or less. It goes straight to private storage — and is deleted right after.
We read the signal
The engine watches every frame — where the eye lands, the cuts, the motion, the sound — the things that actually decide whether a thumb keeps scrolling.
Fix the weak seconds
Get your scores, the attention curve, a heatmap, and a plain-English fix list. Re-cut, re-scan, ship the stronger version.
Three free ways to see your creative clearly.
No upload needed — start with your public account. Free with a Gmail sign-in.
Roast my account
TikTok · Instagram · Facebook
Paste your handle. We read your last 12 public posts and hand back a blunt, honest scorecard — Hook, Consistency, Timing — plus your best and worst post.
Roast meRealness Check
TikTok · Instagram · Facebook
A fast fake-follower / engagement-quality screen. The cheap sanity check brands run before paying a creator — built on real public post stats.
Check an accountThe Autopsy
TikTok
Paste a hit and a flop. The engine compares the opening seconds of both and tells you what the winner did differently — frame by frame.
Compare two clipsEvery score traces to a real signal
No random numbers in a neuroscience costume. Each metric is computed from your actual footage.
Virality Index
An overall 0–100 read on creative strength, blended from every signal below.
Signal · Composite — labeled honestly, not a guaranteed view count.
Hook Strength
How hard the first second grabs — and the exact moment your strongest beat lands.
Signal · Early saliency, audio onset, motion & cut density.
Hold Rate
Predicted retention — do they stay, or thumb away through the middle?
Signal · Retention model over the attention curve.
Attention Curve
A second-by-second line of where focus rises and drifts across the whole clip.
Signal · Fused per-frame saliency + motion + audio energy.
Sound & Pacing
Whether your audio and cut rhythm pull attention or let it sag.
Signal · RMS, onset, silence ratio, cut cadence.
Attention Heatmap
A visual map of where the eye is pulled on each key frame — your thumb-stop zones.
Signal · Real visual-saliency map. Illustrative, not medical.
Where the eye actually goes.
The eye is pulled toward motion, contrast and faces before anyone reads a word. If your hook text sits in a dead zone while something bright steals the center, the viewer never sees what you meant them to.
The attention heatmap shows you — frame by frame — whether your subject, your caption and your hook are winning the eye, or losing it to something incidental.
How visual saliency works
Built like an instrument — not a hype machine
Most “virality” tools sell a feeling. Here's the difference, line by line.
We'd rather lose the sale than fake the science. Read the methodology and decide for yourself.
Built for people who post on purpose.
Creators
Stop guessing on TikTok, Reels & Shorts. Catch a weak hook before it costs you the post.
UGC & agencies
Ship more winners per shoot. Show clients why a cut works — with signal, not opinion.
Performance marketers
Score the hook before you put spend behind it. Kill the weak variant pre-boost.
Editors
Defend the cut with data. Find the second that sags and fix it before delivery.
The score means something — here's why
Real signal, not a slot machine
Every number is computed from your footage — visual saliency, motion, cuts, audio, faces. We never dress a random number in neuroscience.
We show our work
The big tools hide their price and their method behind a sales call. Our methodology is public, and we publish where it's weak.
Your footage stays yours
Clips are deleted right after analysis. We never train on your content and never run face recognition. Privacy is the default, not an upsell.
Lock in founding-member pricing
We're in early access. Founding members keep $19 Creator / $49 Pro for as long as they stay — before public pricing goes up. Your rate never rises.
Start free. Scale when it pays.
1 scan = 1 credit. Cancel anytime.
Free
Feel the wow. Gmail sign-in, no card.
1 free scan to start
- 1 free scan to start
- Hook, Hold & Attention scores
- Real visual-attention heatmap
- Second-by-second attention curve
- No card needed
Creator
For solo short-form creators shipping daily.
50 scans / month
- 50 scans / month
- Everything in Free
- Plain-English fix list
- Scan history
- Email support
Pro
For power creators, UGC freelancers & small teams.
200 scans / month
- 200 scans / month
- Everything in Creator
- JSON export
- Public API access
- Priority support
Team & API plans coming soon · prices in USD · billed by KAK Digital LLC via Stripe.
Straight answers
Does a high score mean I'll go viral?
No — and we'll never claim that. Virality also depends on your account, timing, and the algorithm. Scrollproof predicts creative strength: how well the clip is built to stop the scroll and hold attention. It's a diagnostic to fix weak seconds before you post.
What's the attention heatmap?
A real visual-saliency map computed from your frames — it estimates where a viewer's eye is pulled. It's an illustrative attention model, not a medical or neurological reading.
What happens to my video?
It uploads to secure private storage, gets analyzed, and is auto-deleted shortly after. We never use your content to train anything, and we don't run face recognition.
How is this different from other virality tools?
Every Scrollproof number traces to a measurable signal in your footage, the methodology is public, and we say plainly what the score can't do. No hidden black box, no guaranteed-views promise.
How long can a clip be?
Up to about 15 seconds works best — that's the short-form sweet spot the engine is tuned for.
Make every clip thumb-stopping.
One free scan, no card. See what the scroll sees — then ship the stronger cut.
Scan a clip free