Predict second-by-second viewer retention for the first six seconds of a short-form video hook, then provide concrete opening fixes.
Turn openings that get scrolled past in 3 seconds into hooks that stop the scroll. Pin down the content's real payoff and the scrolling context the audience meets it in; diagnose the old opening against five common hook-killers; then mass-produce 10 variants from an eight-pattern hook matrix (curiosity gap, counterintuitive, specific number, and more), adapt them per platform, and finish with a payoff check and an A/B plan.
Analyzes your video hook or script, predicts 1-to-6-second retention, exposes drop-off points, and instantly generates a fully rewritten, high-retention script version.
Upload a video and HookScan measures its first 8 seconds: when the first word is spoken, when the picture first changes, cuts, movement, on-screen text, faces, loudness and silences. Each check is PASS or FIX with the change in seconds. You also get two re-cut videos: trimmed_open.mp4 with the silent start and long pauses removed, and cold_open.mp4 that opens on your strongest line. No retention guesses, only measured numbers. A 10-minute 1080p file took about 3 minutes in our test.
HookCraft Studio turns a topic and source material into a complete, fact-checked faceless-YouTube package — not just a hook. You get: 10 scored titles (top 3 shown), a full script (900-1300 words) with a scroll-stopping hook grounded strictly in your source (no invented facts), a mandatory fact-check pass with a reproducible score, and 5 scored thumbnail-text concepts that don't just repeat the title. Built from a method proven on a live YouTube channel.
Generate 5 scroll-stopping TikTok hook variations optimized for the For You Page algorithm — each built on a different psychological pattern (shock, question, list, story, visual demo), with shot direction and a why-it-works rationale. Use when you want TikTok opening hooks, need to grab attention in the first 3 seconds, or mention FYP. Output is a creative starting point for you to adapt.
Stop guessing why short-form videos work. ViralLens reverse engineers Instagram Reels, TikToks, YouTube Shorts and short-form ads to uncover their: Hook Retention mechanics Proof Desire Visual selling Creative structure Then it rebuilds those principles into original hooks, angles and ready-to-film scripts for your own business. Steal the DNA, not the video.
Paste one published short's script plus its real analytics and get a retention autopsy of that exact video: a self-contained HTML report with the drop-off mapped second by second, a PASS / REWORK / REBUILD verdict against printed thresholds, a shot-by-shot cut list, and five hook variants.
Your opening is leaking viewers. Get a band-by-band diagnosis of the full first 30 seconds — plus 5 rewritten hooks you can film word-for-word. English & 中文. 你的视频开头正在流失观众。逐段诊断完整前 30 秒，再送你 5 条可以逐字照着拍的改写开头。支持英文与中文。