HomeCasa Prompts

Social media caption pack in your brand voice

Write captions for a batch of posts in your brand voice: a voice guide drawn from your own captions, 3 versions per post, alt text and a self-check against the voice. Designed for ChatGPT, Claude, Gemini and Microsoft Copilot. It includes 5 customizable variables and you can copy it for free in one click.

Intermediate · Text · Pending editorial review

Designed for:

Prompt

Act as a social media copywriter who can match a brand's voice precisely.

Context:
- Brand: {{brand}}
- How I describe our voice: {{voice}}
- Examples of captions we have published and like (paste them): {{examples}}
- Posts that need captions (one per line, with what the image or video shows): {{posts}}
- Platform: {{platform}}

Deliverables:
1. A voice guide in 8-10 lines, inferred from my examples: traits, words we use and avoid, typical length, emoji and punctuation habits, how we sign off. If the examples are not enough or contradict each other, ask me before writing.
2. For each post, three versions: short (1-2 lines), medium (with context or a tip) and story (a small narrative). Each with a first line that works before the "more" cut-off and a fitting call to action (comment, save, share, visit the link).
3. Descriptive alt text for each image, without repeating the caption.
4. At most 3-5 suggested hashtags per post, marked "to verify", or none if they add nothing.
5. Self-check: a table scoring each version from 1 to 5 against the voice guide and flagging any line that sounds generic.

Constraints:
- Do not invent prices, dates, ingredients, features or testimonials. If something is missing, use [FILL IN].
- Avoid filler formulas ("Don't miss out!", "Thoughts?" with no context).
- Respect the character limit of {{platform}}.

Format: the voice guide first, then one block per post with the versions ready to copy.

How to use it

Paste 3 to 6 past captions that represent your voice well and the list of upcoming posts. Save the voice guide it produces and reuse it in later requests to stay consistent.

Usage example

Brand: sourdough bakery in Milwaukee · Voice: warm with dry humor · Posts: fresh rye loaf, Saturday sourdough workshop, closed for vacation.

Sample output

Voice guide (inferred from your examples)

  • Short sentences, often in pairs: a fact, then a dry joke.
  • The humor is at your own expense, never the customer's.
  • Craft precision: exact times, ingredients counted out.
  • No exclamation marks or superlatives ("best bread in town" doesn't live here).
  • Emojis: none, or one at most.
  • Never "Don't miss out!".

Post 1 · Fresh rye loaf

Short

Rye, fresh out. It smells exactly like it should.

Medium

Rye loaf, just out of the oven.
House tip: let it cool before you slice it. We know. It's hard.
Toast or sandwich? Tell us how yours ends up.

Story

At 5 a.m. nobody talks in the bakery. By 6, the rye has made the decisions for us.
This is how it came out. We didn't touch it. We just took the picture.

Alt text: round rye loaf with a dark, cracked crust cooling on a wooden rack. Hashtags (to verify): #sourdough #milwaukeebakery

Post 3 · Closed for vacation

Short

Closed August 12-26. The starter stays. We don't.

…

Key facts

Category
Social media · Captions
Output type
Text
Level
Intermediate
Designed for
ChatGPT, Claude, Gemini and Microsoft Copilot
Verified in
Pending editorial verification
Variables
Brand, How I describe our voice, Examples of our captions, Posts to caption and Platform
Language
English
Price
Free, no sign-up
Updated
Nov 7, 2026

Frequently asked questions

How many examples do I need for it to match my voice?

Three to six real, varied captions usually work. With only one, the model tends to copy that post instead of picking up the style.

What is alt text for?

Screen readers read it aloud for blind and low-vision users, and it helps the platform understand the image. It should describe what is shown, not sell.

What is this prompt for?

Write captions for a batch of posts in your brand voice: a voice guide drawn from your own captions, 3 versions per post, alt text and a self-check against the voice.

Which AI tools does it work with?

It is designed for ChatGPT, Claude, Gemini and Microsoft Copilot. We have not verified it in these tools yet, so results may vary between them.

How do I customize the prompt?

Click “Customize” and fill in the variables (Brand, How I describe our voice, Examples of our captions, Posts to caption and Platform). The text updates instantly and you can then copy it in one click. Values are stored only in your browser.

Do I need experience to use it?

It is intermediate: it helps to know the topic so you can provide good context and review the result critically.

Is this prompt free?

Yes. Every HomeCasa Prompts prompt is free, with no sign-up or subscription. You can also use them in professional projects.

Can I trust the AI output?

Treat it as a high-quality draft: always check data, figures and important claims before publishing or making decisions.

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