# Instagram Caption Generator for Reels (Free Prompt) · Octoclip > A free Instagram caption generator prompt for ChatGPT or Claude: captions for a Reel or post in three lengths, each with a first line worth tapping “more” for. Source: https://octoclip.io/prompts/instagram-caption-generator Updated: 2026-10-18 --- Prompt Captions and titles # Instagram caption generator for Reels and posts. This prompt writes **six Instagram captions for a Reel or post in three lengths, each with a first line worth tapping “more” for**. Fill in five parts, paste it into ChatGPT or Claude, and post the one that sounds most like the person in the video. [Post the result as a job, free](https://octoclip.io/signup/brand?src=prompt_library&utm_campaign=instagram-caption-generator) - Free, no account needed - Works in any assistant - 5 parts to fill in Updated 18 Oct 2026 **01** The prompt ## Copy the prompt. Replace each highlighted part with a fact about your product, then send it. Instagram caption generator 5 parts to fill in ```text You write Instagram captions for Reels and posts about a product. A caption should sound like a person talking, whether it goes out on the brand’s account or on a creator’s own. Write six captions for one Reel or post. - Product name: [PRODUCT NAME] - What the Reel or post shows: [WHAT THE VIDEO SHOWS] - Who is watching: [WHO IT’S FOR] - Who posts it: [THE BRAND OR THE CREATOR] - What I want people to do: [THE ACTION] Write two captions in each length: - Short: one or two lines, under 125 characters, for a Reel where the video tells the story. - Medium: three to five short lines. - Long: a small story or a tip in up to eight short lines, with a line break between them. Rules: - The first line is often all people see before “more”. Make it work on its own: a specific moment, a confession, a surprise or a question. Never open with the product name. - Use a different style for each caption: story, tip, confession, list, question, behind the scenes. - End each caption with one question that is easy to answer in a comment and leads to the action above. - If the brand posts it, write as “we”. If the creator posts it, write as “I” and name the product at most once. - At most one emoji and at most three hashtags per caption, with the hashtags at the end. - No ad words or slogans. Write the way people text their friends. Give the six captions with the length and style in brackets before each one. Then say which one you would post first, and why, in one line. Don’t invent features, numbers or results. If a fact is missing, write [ASK THE BRAND] instead of guessing. ``` Paste it into ChatGPT, Claude or any other assistant. **02** Fill it in ## What to put in each part. Short and specific beats long. Leave a part out and the assistant asks or marks it, instead of guessing. - **[PRODUCT NAME]**: The name as people see it. **Headspace** - **[WHAT THE VIDEO SHOWS]**: What happens in the Reel or post, in one or two sentences. **A creator’s 11 p.m. wind-down: phone on the nightstand, a short guided session, lights off.** - **[WHO IT’S FOR]**: One kind of viewer. **People who scroll in bed when they should be asleep.** - **[THE BRAND OR THE CREATOR]**: Whose account it goes out on. It changes the voice from “we” to “I”. **The creator** - **[THE ACTION]**: One thing: comment, save the post, try the app. **Share their own wind-down in the comments.** **03** Example output ## What you get back. The prompt filled in for Headspace, the meditation app, and three of the six captions it returned. Filled in with *Product* Headspace *Video* an 11 p.m. wind-down *Posted by* the creator *Action* share their wind-down Headspace **Instagram captions · Headspace** 3 of 6 · short, medium and long Example output Captions 1. 11 p.m. The phone goes face down. What’s the last thing you do before sleep? Short · Confession 2. My wind-down has three steps now. Phone on the nightstand. One short Headspace session. Lights off. It’s the only part of the day nobody needs anything from me. What does yours look like? 🌙 Medium · Story 3. A small rule I keep: my phone gets one last job before bed. Its last job is a short guided session, then it goes face down for the night. It sounds too simple. It’s also the part of the evening I look forward to. What job would you give your phone at the end of the day? #winddown #bedtimeroutine Long · Tip Post first Number 2. “My wind-down has three steps now” gives people a reason to tap “more”, and the question is easy to answer. The answer changes a little each time you run the prompt. Check it against your product before you post it. **04** On Octoclip ## Add the captions to a job. When the creator posts on their own account, put your favourite caption in the brief as a starting point and let them say it their way. Where each part goes 1. **What the Reel shows** Job title and brief 2. **Your favourite caption** Brief, as a suggestion 3. **The question at the end** Must-include points 4. **Reels** Where it’s posted 1. Free **Post a job free.** Paste the result into the brief. Give each hook or angle to a different video. 2. You choose **Pick from who applies.** Creators apply to film it. Watch their videos and send an offer to the ones you like, at the price per video you set. 3. One revision **Review against your points.** Each must-include point is a check when the video comes in. A video that misses one gets a revision request that names it. [Post the result as a job, free](https://octoclip.io/signup/brand?src=prompt_library&utm_campaign=instagram-caption-generator) [How Octoclip works](https://octoclip.io/#s-how) **Posting a job is free.** You’re charged only when a creator accepts. ## About this prompt **Written by Octoclip.** Published 18 Oct 2026, updated 18 Oct 2026. ### How we check it The prompt tells the assistant not to invent features, numbers or results. Octoclip wrote and checked the example output before it was published. FAQ ## This prompt, answered. What brands ask before they use it. **A person answers.** Can’t find your question? Write to us and someone at Octoclip replies. [Write to us](mailto:support@octoclip.io) ### What is an Instagram caption generator? A tool or prompt that writes the text under a Reel or post. This one runs in ChatGPT or Claude and writes six captions in three lengths, each with a first line written to earn the tap on “more” and a question for the comments. ### How long should an Instagram caption be? Any length can work if the first line does. Instagram shows only the start of a caption before “more”, so put the hook there. Short captions often suit Reels, where the video tells the story. ### How many hashtags should an Instagram caption have? A few that describe the post. Three is plenty for most Reels, and a long block of tags looks like spam. For a set to start from, try the [hashtag generator](https://octoclip.io/prompts/hashtag-generator). ### Is this Instagram caption generator free? Yes. Copy the prompt and use it as often as you like. You don’t need an Octoclip account. ### Who writes the caption when a creator posts a Reel for my brand? Usually the creator, in their own words. Suggest a caption in the brief and add anything it has to mention as a must-include point. **A person answers.** Can’t find your question? Write to us and someone at Octoclip replies. [Write to us](mailto:support@octoclip.io) Related prompts ## Prompts to use next. [All prompts](https://octoclip.io/prompts) [Captions and titles TikTok captions The caption under the video and the text on screen, matched to what is said. Open the prompt](https://octoclip.io/prompts/tiktok-captions) [Captions and titles Hashtag generator A few hashtags for one video, sorted into broad, niche and brand, and how many to use. Open the prompt](https://octoclip.io/prompts/hashtag-generator) [Ideas and planning Instagram post ideas Six Reels for creators to film and two carousels made from them, each with its first line. Open the prompt](https://octoclip.io/prompts/instagram-post-ideas) [Scripts and hooks Hook generator Ten opening lines for the first two seconds, each in a different style. 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Post it as a job and see who wants to film it before you pay anything. [Post the result as a job, free](https://octoclip.io/signup/brand?src=prompt_library&utm_campaign=instagram-caption-generator) [Sign in](https://octoclip.io/login) **Posting a job is free.** You’re charged only when a creator accepts. [Post a job free](https://octoclip.io/signup/brand?src=prompt_library&utm_campaign=instagram-caption-generator)