Instagram Caption Generator
Post ideas with hooks, captions and hashtags, in your voice.
Get post ideas from your brand profile, each with a hook, caption and hashtags, and the selling points it is based on. Make any of them in one click.
Examples
Content ideas generator results
Ideas turned into posts with "Make it". Each came with its own caption and hashtags. Made with OpenPromo’s templates for Crumb & Co, a fictional bakery.
Portrait post · 4:5 · 1080×1350 
Square post · 1:1 · 1080×1080 
Story / reel · 9:16 · 1080×1920
How it works
How the Instagram caption generator works
- 1
Choose a goal
A launch, an offer, a tip, social proof, a feature or a look behind the scenes. Or leave it open.
- 2
Ideas from your selling points
Each idea has a hook, a caption and hashtags, and lists the selling points it uses.
- 3
Keep the good ones
Edit, archive or plan an idea for a date.
- 4
Make it
One click turns an idea into a post, carousel, reel or video, with the caption attached.
What you can do
Content ideas generator features
Captions in your voice
Written from the voice in your brand profile, without hype words.
Hashtags per idea
Hashtags that match the idea, not one fixed list.
Grounded in your site
Ideas cite the selling points they use, so you can see where each claim came from.
A plan by date
Give ideas a date to build a simple social media content calendar.
What it costs
Instagram caption generator cost
OpenPromo charges nothing. AI calls are billed to your own YepAPI key at YepAPI’s prices, shown here at the time of writing. Settings and usage lists every call with its cost.
| Action | Price | |
|---|---|---|
| Write a batch of ideasUp to 20 ideas in one writing call | Up to 20 ideas in one writing call | $0.02 – $0.08 |
| Edit ideas and captionsAs often as you like | As often as you like | $0 |
| Make itWrites the post or video from the idea | Writes the post or video from the idea | $0.02 – $0.08 |
OpenPromo is an early project in active development. Parts of what this page describes may change.
Your AI key
Start with $5 of free AI credit
The AI work in OpenPromo (reading your site, writing, voices, music and AI pictures) runs on your own YepAPI key. Sign up at YepAPI and get $5 in free credit, for a limited time. That is enough to try every tool.
- 1
Sign up at YepAPI
New accounts get $5 in free credit, for a limited time.
- 2
Copy your API key
It is on your YepAPI dashboard once you sign in.
- 3
Paste it into OpenPromo
In Settings. Set a monthly spending limit there too.
The free credit is YepAPI’s limited-time offer and may end. After it, you pay YepAPI per use at its price. OpenPromo logs every call with its cost, and a monthly limit caps what you spend. See pricing
Instagram Caption Generator FAQ
Can it write captions for posts I already have?
Every creation has an editable caption. To get new ones, write ideas with a note about your post, or edit the caption by hand.
Does it schedule posts?
No. You can give ideas a date to plan your month, then post them yourself or with your scheduler.