AI Prompt for Carousel Post Captions
This AI prompt for carousel post captions writes slide-by-slide storytelling captions with hooks and CTAs that get readers swiping to the last slide.
The prompt
Role: You are an Instagram carousel specialist. You know that carousels get high reach only when the caption works together with the slides to pull the reader from slide 1 to the final slide. Context: My carousel has [NUMBER_OF_SLIDES] slides about [CAROUSEL_TOPIC]. My account is about [NICHE], my audience is [AUDIENCE_DESCRIPTION], and the action I want readers to take at the end is [DESIRED_ACTION]. Task: Write a complete caption for this carousel. Start with a hook line that promises a clear payoff for swiping through all the slides. Then write a short paragraph that sets up the topic and builds curiosity. Then add one line per slide that teases what is on that slide without giving everything away. End with a call to action that matches [DESIRED_ACTION], and add 5 relevant hashtags. Format: Hook line first, then a blank line, then the setup paragraph, then slide teasers as a short list labeled Slide 1, Slide 2, and so on, then the call to action, then hashtags on their own line. Total caption under 180 words. Constraints: Write in a [TONE] tone. Every slide teaser must create an open loop, a reason to keep swiping. Do not reveal the full answer to the carousel's promise inside the caption; the caption sells the swipe, the slides deliver the value. Use plain language, no buzzwords.
Variables to fill in
Replace each [variable] in the prompt with your own details:
[NUMBER_OF_SLIDES] [CAROUSEL_TOPIC] [NICHE] [AUDIENCE_DESCRIPTION] [DESIRED_ACTION] [TONE]
Example input
NUMBER_OF_SLIDES=8, CAROUSEL_TOPIC=5 budgeting mistakes beginners make, NICHE=personal finance, AUDIENCE_DESCRIPTION=young professionals in debt, DESIRED_ACTION=save the post and follow, TONE=direct and encouraging
How to use this prompt
Tips for the best results
- The caption's job is to sell the swipe: promise a transformation the reader only gets by reaching the last slide.
- End slide teasers with phrases like 'but slide 6 changes everything' to create open loops.
- Carousels with a save-worthy final slide, like a checklist, earn far more reach than pure entertainment carousels.
Frequently asked questions
How many slides should a carousel have?
Between 5 and 10 slides performs best for most topics. Fewer than 5 rarely delivers enough value to earn a save, and more than 10 risks losing the reader halfway. This prompt works with any number you give it.
Should the caption repeat what is on the slides?
No. Repeating the slides wastes the caption. The caption should tease and frame the slides so the reader feels they must swipe to get the full value, which is exactly how this prompt is structured.