Customer Acquisition Cost Calculator
Work out CAC from spend and new customers, with profit per customer.
First-three-seconds hooks for short video, AI or instant.
The TikTok Hook Generator turns a video topic and tone into ten spoken opening lines instantly, each short enough to deliver in about three seconds and built to give a viewer a reason to stay, or writes fresh ones with AI.
Short video is decided in the first three seconds. A viewer has already half-swiped by the time you finish saying hello, which is why "Hi guys, welcome back" is the single most expensive opening on the platform.
Enter what the video is about and pick a tone, and Instant mode writes ten spoken hooks — the line you say straight to camera before anything else. Each is short enough to deliver in about three seconds and built on a pattern that creates a reason to stay: a stake, a mistake, a number, a promise, a contradiction.
Instant mode runs entirely in your browser. AI mode is optional, sends only the topic and tone you typed, and only when you click Generate.
The default mode builds hooks from templates entirely in your browser.
Switch it on for hooks written fresh by a language model.
Each hook is one sentence, around three seconds long when read aloud.
Bold, funny, curious and useful each pull from different hook patterns.
The same hooks carry to Instagram Reels and YouTube Shorts unchanged.
The subject or the single point the video makes.
Bold, funny, curious or useful changes which hook patterns are used.
Ten hooks appear. The right one is the one that sounds natural in your voice.
Start the visual before the line lands, not after — a static first frame loses viewers on its own.
One sentence, about three seconds spoken — roughly eight to twelve words. If it needs a comma and a pause, it is probably too long for the opening frame.
TikTok and Reels both weight early retention heavily. A large share of viewers decide within the first moments, so a weak opening caps how far the video can travel regardless of how good the rest is.
Yes. All three formats reward the same thing — an immediate reason to keep watching — so the hooks carry across with no changes.
Both, ideally. Say the line and put a shortened version on screen, since a good share of viewers watch with sound off for the first second or two.
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