> Index of Phersa pages for AI agents: https://phersa.com/llms.txt

# Instagram Caption Generator

This Instagram caption generator gives you five captions for a post or Reel, built from your topic, your goal and your tone, with the line breaks in place. It is for anyone who posts, on their own page, an AI persona page or a faceless page. Add a comment keyword and every caption ends on the ask.

## How to use the Instagram Caption Generator

1. Type what the post is about. Pick a goal, a tone and a length.

2. If the post asks for comments, add the keyword and what the DM sends. Pick a niche to add hashtags.

3. Copy the caption you like into Instagram or Facebook. Press Generate 5 captions for five more.

## How long an Instagram caption can be

| Limit | What it means |
| --- | --- |
| 2,200 characters | The most a caption can hold. Spaces, line breaks, emoji and hashtags all count. |
| 5 hashtags | The most Instagram allows on a post or Reel since December 2025. |

The feed shows only the first lines of a caption. The rest sits behind “more”. Put the line that matters first.

## Write the caption around a comment keyword

On a comment-to-DM post, the caption repeats the ask from the video and says what the DM sends.

- **Write the keyword in capitals.** “Comment GUIDE” stands out in a block of text.
- **Name what they get.** “The full routine” or “the shopping list”, not “more info”.
- **Use one keyword per post.** The same word on screen, in the video and in the caption.

No keyword yet? Pick the goal “Get comments for a DM” and leave the keyword empty. The generator takes one from your topic.

## Short, medium or long

- **Short:** one line and the ask. For Reels where the video says it all.
- **Medium:** a line, two sentences of context, the ask. For most posts.
- **Long:** a line, three short points, the ask and a sign-off. For carousels and posts people save.

Your caption asks for the comment. Next, send a DM with your link to everyone who comments the keyword, on Instagram and Facebook. [How comment-to-DM works →](https://phersa.com/comment-to-dm)

## Instagram Caption Generator questions

### How long should an Instagram caption be?

As long as the post needs, with the point first. The feed shows only the first lines before “more”. Put the line that stops the scroll and a short ask at the top, and the detail after it.

### How do I write a good Instagram caption?

Open with one line that gives a reason to keep reading. Add a sentence or two of context. End on one ask: a comment keyword, a question or “save this”. Keep the tone of the video.

### What should a caption say on a comment-to-DM post?

One line on what the post is about, then the ask: the keyword in capitals and what the DM sends. For example: “Comment GUIDE and I’ll send you the full guide.”

### Do keywords in captions help people find my post?

Yes. Instagram says Search matches words in captions. Name the topic in plain words, not only in hashtags.

### Can I use these captions for an AI influencer or faceless page?

Yes. The captions speak as the account and never claim a personal result, so they fit a page where an AI persona presents.

## More free tools

- [Hook Generator — Ten opening lines for your next Reel, across 12 hook types, as a spoken line or on-screen text.](https://phersa.com/tools/hook-generator)
- [Instagram Hashtag Generator — Up to five hashtags for your post, mixing broad, niche and your own topic tags.](https://phersa.com/tools/instagram-hashtag-generator)
- [Comment-to-DM Generator — The call to action, DM versions and public replies for a comment-a-keyword post, ready to copy.](https://phersa.com/tools/comment-to-dm-generator)

[See all free tools for AI persona creators →](https://phersa.com/tools)

Source: https://phersa.com/tools/instagram-caption-generator