Ad hook scorer
Paste the opening line of your ad. You get a score on Context, Clarity and Curiosity, what is missing, and three rewrites. Free, with no signup.
An AI assessment of the words only, not a prediction of ad performance. Your text is sent to Anthropic’s Claude API and is not saved by us.
Smash performance ceilings. Scale profitably with AI-powered, creative-led growth.
Creative strategy, production and testing for the fastest-growing products in the world.
RocketShip HQ’s AI-powered performance creative teams run thousands of creative experiments every month to find your next winners, so you can scale profitably and sustainably.
“As one of the top-spending advertisers on TikTok, we have a high bar for great creatives, and Rocketship delivered on both production and performance. We thoroughly enjoyed working with the team, as they communicated strategy clearly, shared detailed briefs, and were generally very open and collaborative.”
Eva JuretićGrowth Marketer, Highrise“... grew our UA spends from zero to 7 figures, helped our DAUs grow 7x - and get acquired by a public company”
Jeb BaliseCEO, DropFitnessFormer General Manager at Zynga & former CEO at PuzzleSocial
What makes an ad hook work
RocketShip HQ uses the 3C Principle to review hooks. Context tells the right viewer this is for them. Clarity tells them what it is about. Curiosity opens a loop that gives them a reason to keep watching.
Most weak hooks have one or two of the three. A hook can be clear and still dull, or intriguing and still leave the viewer unsure what the ad is selling. Scoring each part separately shows you which one to fix first.
How to use your score
Start with the weakest C. Change that one thing, score it again, and compare. Then take your strongest two or three versions into a live creative test, because the score reviews the words and only your audience can show what performs.
Text is one layer of a video hook. Once the words work, plan the visual, on-screen text, voiceover and audio together with the Creative Brief Generator. To work out how many hooks your budget can test, use the Creative Testing Calculator.
Frequently asked questions
What does the ad hook scorer check?
It scores your hook from 1 to 10 on Context, Clarity and Curiosity, says what is missing for each, and writes three rewrites that each take a different approach.
Does a high score mean the ad will perform?
No. The score is an AI assessment of the words against the 3C Principle. It does not predict CPI, CTR or ROAS. Only a live test with your audience can tell you that.
Is it free, and do I need an account?
It is free with no signup. To keep it free there is a limit on how many hooks one person can score per hour, and a limit across all users per day.
Is my hook stored?
We do not save the text you submit or write it to our logs. It is sent to Anthropic's Claude API to generate the result and is handled under Anthropic's API terms. To enforce usage limits we keep a one-way hash of your IP address for up to three days. Do not paste anything confidential.
Can it judge the visual part of my hook?
It only reads text. If your hook depends on what is on screen, describe the visual in your hook text, or use the Creative Brief Generator to plan all four layers.