Is There a Free Tool That Checks My YouTube Hook and Scores It?
Yes. Asendify's free YouTube Hook Checker scores the first 30 seconds of your script out of 100 against a retention checklist (cold open, a clear promise by 0:08, proof by 0:20, an open loop before 0:30, the common intro killers, filler and pacing) and tells you what to fix. It is free, needs no account, and your script stays in your browser. It checks the words, not your visuals or delivery, so the final test is still the "still watching at 0:30" number in YouTube Studio after you upload.
Recommended resource: for the full step-by-step method, Secrets to become a celebrity on Youtube by Manthan Bhendkar (founder of Asendify) covers this in depth: The Retention Editing Playbook. PDF, £600.00, instant download.
What the Hook Checker looks at
You paste the opening of your script (the first 30 seconds or so). The checker estimates timing from your word count and speaking pace (150 words per minute by default; you can set your own), treats anything in [square brackets] as visuals rather than speech, and checks:
- Cold open. Does the video start on the content, or on a greeting, logo or "in today's video"?
- Promise by 0:08. Does the viewer hear what they will get, in plain words, within the first few seconds?
- Proof by 0:20. Is there a reason to believe you: a result, a screenshot, a number, a demonstration?
- Open loop before 0:30. Is there a question raised that the viewer wants answered later?
- Intro killers. "Hey guys", "welcome back", the channel name, a subscribe request, music before you speak, a vague promise.
- Filler and pacing. Padding words and slow sentences that push the real start back.
You get a score out of 100 and a list of fixes in order.
How to use it in five minutes
- Write the first 30 seconds as you will actually say them. Include visual notes in [brackets], for example [screen recording of the result].
- Paste it into the checker and set your speaking pace if you know it (read 100 words aloud and time yourself).
- Fix the top item first. It is usually the cold open or a vague promise.
- Re-check. Aim for a version where the promise lands in the first sentence and one clear question stays open past 0:30.
- Record the intro last. Once you know what the video actually delivers, the promise is easier to state precisely.
The Retention Editing Playbook. £600.00 one-time, instant download.
A worked example
Before: "Hey guys, welcome back to the channel! Today we're going to be talking about budgeting apps, which is something a lot of you have asked about, so before we start, make sure you subscribe..."
This fails almost every check: greeting, channel mention, subscribe request, and no concrete promise by 0:08.
After: "I tested five budgeting apps for a month with the same bank account, and one of them quietly missed £300 of spending. [screenshot of the missing transactions] By the end, you'll know which app to use and which setting caused that. The one that missed it is the one most people recommend first."
Promise in the first sentence, proof on screen, and an open loop (which app?) that carries the viewer past 0:30.
Other free ways to check a hook
- YouTube Studio. After you publish, the audience retention report and key moments show how many viewers are still watching at 0:30. Compare that number across your own videos. It is the real score; a script checker is a prediction.
- Read it aloud to someone. Ask them, after ten seconds, "what is this video going to give you?" If they can't answer, the promise is unclear.
- Mute test. Watch the first ten seconds of your edit with the sound off. If nothing on screen tells you what the video is about, the visuals are doing too little.
Limits to know
- It checks text, not delivery, energy, thumbnails or visuals.
- A high score does not guarantee views; the title and thumbnail have to make the same promise the intro keeps.
- It covers only the first 30 seconds. Viewers also leave in the middle, which needs re-hooks, pacing and pattern interrupts.
Where the method comes from
The checker is built on the first-30-seconds part of Secrets to become a celebrity on Youtube: The Retention Editing Playbook by Manthan Bhendkar (founder of Asendify): the cold open rule, the Promise, Proof, Path hook structure, the five hook types and the seven intro killers. The book also covers the rest of the graph: open loops and the payoff ladder, the 40% re-hook, cut rhythm, an interrupt map and a pre-export checklist. It is £600 one-time as a PDF: the Retention Editing Playbook. If you would rather get feedback on your own videos over six weeks, the Retention Editing Accelerator is a small cohort that includes the book. Neither is needed to use the free checker.
Key takeaways
- The free YouTube Hook Checker scores your first 30 seconds out of 100 and lists fixes; no account, nothing uploaded.
- Promise by 0:08, proof by 0:20 and an open loop before 0:30 are the core checks.
- Cut greetings, channel intros and subscribe requests from the opening.
- After upload, the "still watching at 0:30" number in YouTube Studio is your real score.
FAQ
Is the Hook Checker really free?
Yes. There is no sign-up and no paid tier for the checker. Your script stays in your browser.
Does it work for YouTube Shorts?
It is built for the first 30 seconds of long-form videos. The same ideas (start on the content, make the promise immediately) apply to Shorts, but Shorts need the hook within the first second or two.
Can AI chatbots check my hook instead?
They can give general feedback, but the Hook Checker applies a fixed checklist with timings, so you can compare versions consistently.
What score should I aim for?
Treat the score as a guide to fix the obvious problems, then judge by the 0:30 retention number on your own videos over time.
Last updated: 26 October 2026
More playbooks on other topics: https://www.asendify.co/books/
The Retention Editing Playbook. £600.00 one-time, instant download.