Instagram Caption Generator

Write an Instagram caption around your post, audience and goal. The generator creates a strong first line, scannable body and natural CTA while keeping supplied facts intact.

How it works

Describe what the content needs to communicate, then set the audience, tone and goal. Spira returns a primary draft, up to three alternatives and practical notes shaped for this specific social format. Generation uses credits and requires sign-in.

1
Describe the content
Provide the topic, offer, source material, key points and any constraints the draft must follow.
2
Set audience, tone and goal
Add the context that should shape the wording, structure and call to action for the selected platform format.
3
Generate and refine
Review the strongest draft, compare genuinely different alternatives and copy the version you want to edit or publish.

What you get

Simple tools, clear results, no unnecessary steps

A first line built to earn attention

Open with the most useful or intriguing part before the caption is truncated in the feed.

Readable long or short copy

Use spacing and structure that make the result easier to scan on a phone.

Format-specific output

Each tool is prompted for the conventions of its format, from hook-first short scripts to skimmable LinkedIn posts.

Alternatives worth comparing

Generate up to three distinct options instead of receiving the same draft with minor word changes.

Your facts stay in control

The generator is instructed to use facts present in your brief and clearly label assumptions or recommendations.

Describe the visual

Tell the generator what appears in the image, carousel or Reel so the caption adds context instead of repeating the obvious.

Choose one next action

A focused prompt to comment, save, share or visit a link is clearer than stacking several competing requests.

FAQ

Can it write captions for Reels and carousels?

Yes. State the post format and what the visuals contain in your brief.

Does it add hashtags automatically?

You can request hashtags, but a separate hashtag generator gives more control over the mix.

Can I ask for a specific length?

Yes. Include a short, medium or exact character preference in the input.

Create a stronger first draft

Open the tool with a specific brief, then edit the generated result with your own examples, proof and brand voice before publishing.