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Instagram caption generator

Type your website. Our Instagram caption generator reads it and writes 3 captions about your business, written to be saved and shared.

Free, no sign-up. Up to 3 runs a day.

How it writes

The first line works as a hook. Then a short list or steps, written as your business, a soft ending, and no hashtags. Never an ad, never a made-up number.

Example for a coffee shop

  1. 1 · Insider list

    What we see behind our Bondi coffee counter that most people never get to see. We roast our own beans, so the coffee in your cup started in our shop. The pastries are baked every morning, and the oven is on before the first cup. A good coffee and a warm pastry make a slow morning feel like a plan. We taste the coffee as we roast, because the beans tell us when they're ready. Most of our day is small things done the same careful way. Next time you're in Bondi, look behind the counter and you'll see it too.

Instagram caption generator examples by industry

The opening lines of captions Postdom's writer wrote from real businesses' homepages, one per business type.

  • Real estate

    What a local real estate agent sees that most home hunters never do

  • Dental

    What we see in family dental care that most people never get to watch

  • Restaurants

    Here's what our salads know about the morning before you walk in.

  • Med spas

    Here's what we see in our skin care clinics that most people never hear about.

  • Home services

    Here's what plumbing looks like from our side of the wall.

  • Hotels

    Eight cities, one hotel family, and a few things we know that guests might not.

What makes an Instagram caption work

The rules our writer follows for captions. Measured ones show the figure; the rest are house rules.

  • House rule

    Make the first line the hook

    The platform cuts the caption after a line or two. The first line has to earn the tap on "more", and it's never a question.

  • House rule

    Tell it, don't sell it

    A list or steps the reader can use, then a soft ending. A save or share invitation is fine; a hard ask isn't.

  • Comment-to-get asks: 0.51x

    Never "comment KEYWORD"

    On a post meant to reach new people, a comment-to-get ask did worse.

  • House rule

    Only true specifics

    Real steps, real amounts, real names from your website. Never a made-up client, number or result.

  • House rule

    Leave out hashtags

    Postdom's captions put the effort into the words. Add your own if you want them.

  • House rule

    Write like a person

    First person, short lines, contractions. Never brochure words like "leverage" or "ensure".

Measured figures are from 1,018 TikTok photo posts and 105 Instagram carousels (1 Oct 2026), each against its own account's median views. The rest are Postdom's house rules.

Free instagram caption generator

  1. Type your website

    We read your homepage to learn what you do and who it's for.

  2. Get 3 captions

    Written by the same writer and rules Postdom uses for every post it makes.

  3. Get the finished posts

    Sign up free and Postdom turns them into slideshows and videos with the caption attached, ready for you to approve.

Instagram caption limits

What Instagram documents for a caption, and the hashtag cap it added in December 2025.

2,200characters per caption (Instagram's publishing API)
5hashtags per post since December 2025

Instagram's Help Center still says 30 hashtags; the 5-hashtag cap came later, from Instagram's head, Adam Mosseri.

All caption and hashtag limits, platform by platform

Questions

Is the Instagram caption generator free?

Yes. You get 3 captions a run and up to 3 runs a day without an account. Sign up free for more captions and the finished posts.

How long should an Instagram caption be?

Instagram allows up to 2,200 characters. Ours run 60 to 150 words: long enough to give the reader something, short enough to read in one go. The first line does the most work, because it's what shows before "more".

Why are there no hashtags?

Postdom's writer leaves them out and puts the effort into the words. If you add your own, keep to 5: Instagram has capped posts at 5 hashtags since December 2025.

Does it work for Reels and carousels?

Yes. The captions work under a Reel, a carousel or a single photo. On a carousel, the caption can carry the steps the slides don't have room for.

Will the captions make things up about my business?

They shouldn't. The writer only uses what your homepage says and never invents a client, a number or a result. Read each one before you post it.

Why does each caption end the way it does?

Each one ends softly, with a takeaway or a save or share invitation. A hard ask (book now, DM us, link in bio) did worse in our data on posts meant to reach new people.

What does Postdom do with my website?

It reads your homepage once to write the Instagram captions. It doesn't create an account or post anything. Results are kept for 7 days, so the same site gets the same Instagram captions.

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