How to generate social media captions with AI
Describe the post and get an engaging caption with hashtags fitted to your platform.
Getting started
- 1Describe the postSay what the post is about — a news hook, a product, or a thought you want to share.
- 2Pick a mode and platformsPost, Carousel, or Week — the mode decides the result's format; tick off several platforms at once if you like.
- 3Set the rubric, goal, and toneChoose the content type, what the post should achieve, and how it should sound — these and the remaining settings are explained in detail below.
- 4Click "Generate captions"iBro writes captions for every platform you picked, based on every setting.
Tool settings
Mode
Post — one caption per platform selected; Carousel — a caption plus text for each slide; Week — a batch of posts on one topic for a single platform.
Platforms
Which platforms the caption is for — up to several at once, one news hook adapted into a version for each format. Each platform has its own character limit and style.
Rubric
The content type that shapes the text's structure: Reels, Carousel, Storytelling, Behind the Scenes, Value List, Announcement, Personal Story, Case Study, or Meme.
Goal
What the post should achieve: Reach, Saves, Comments, Profile Visits, or Sales.
Tone
How the text sounds: Friendly, Expert, Ironic, Inspiring, Bold, or Calm.
Length
How long the caption is: Short, Medium, or Long-Form.
Ending
How the post ends: A Question to the Audience, "Save This", "Tag a Friend", a Debatable Statement, a Poll, or No CTA.
Emoji
How many emoji in the text: None, Moderate, or A Lot. Defaults to what's typical for the platform you picked.
Voice
Slang level (none, a little, a lot) and how to address the reader — informal, formal, or whatever's typical for the platform. Decides whether the caption reads as coming from you personally or from a brand.
Audience
The niche, who the post is for, and keywords — these shape the wording and which interests the caption should speak to.
Stop words
Strips out common cliches by default; you can add your own words the caption should avoid.
Brand voice
A saved style profile: paste 3–5 of your own posts and iBro learns the writing style and keeps writing in it going forward. The profile is stored in this browser.