How to Create Instagram Carousel Images with AI

A carousel lets you put several images in one Instagram post, so a follower can swipe through a short story, a set of tips or a before and after without leaving their feed. The trouble is that every slide needs its own image, and making eight matching graphics by hand takes time. An AI image generator can do the heavy lifting, as long as you plan the slides first and keep the style consistent. This guide shows how to create Instagram carousel images with AI, step by step, using a small bakery as a worked example.

What makes a good carousel

Before opening any tool, it helps to know what a carousel needs to do. Each slide has to earn the next swipe. The first slide makes a promise, the middle slides deliver it and the last slide tells people what to do next. If the images look like they came from five different accounts, the post feels messy and people stop swiping.

So the goal is not just eight nice pictures. It is eight pictures that clearly belong together, sized correctly, with room for any words you plan to add.

Step 1: get the size and slide count right

Instagram allows up to 20 photos and videos in one carousel post, according to the Instagram Help Center. The limit was raised from 10 to 20 in 2024, as The Verge reported. Most useful carousels are far shorter than that, usually between five and ten slides.

Size matters more than count. Instagram's guide to image resolution says photos are kept at their original resolution when the width is up to 1080 pixels and the aspect ratio sits between 1.91:1 and 4:5. Anything outside that range is cropped. The Help Center also notes that the orientation you choose applies to every photo in the post, so you cannot mix a square slide with a portrait one.

In practice that gives you a simple rule:

• Portrait 4:5 at 1080 x 1350 pixels takes up the most room in the feed and suits most carousels.
• Square 1:1 at 1080 x 1080 pixels is the safe choice if you also repost the images elsewhere.
• Pick one shape and use it for every slide.

Many AI generators produce square images by default. If yours does, either ask for a portrait image if the option exists, or leave generous empty space at the top and bottom of the scene so you can extend or crop it to 4:5 later without cutting off anything important.

Step 2: plan the story before you generate anything

The most common mistake is to start generating images and hope a story appears. Write the slide plan first. A plain list in your notes app is enough. For each slide, write the one idea it carries and the picture that would show it.

Here is a plan for a small bakery sharing "Five ways to keep bread fresh for longer":

1. Cover: a warm loaf on a wooden board, with space for the headline.
2. Tip 1: bread wrapped in a clean cotton tea towel.
3. Tip 2: a bread bin on a kitchen counter.
4. Tip 3: sliced bread going into a freezer bag.
5. Tip 4: a slice in a toaster, to show reviving day old bread.
6. Tip 5: stale bread turned into breadcrumbs in a bowl.
7. Closing slide: the shop front with space for "Order fresh loaves daily".

If you are stuck for the words, the AI Writer can draft a slide by slide outline from a short brief, and AI Chat is handy for tightening each slide to a single short line. Check every tip yourself before posting, because an AI draft can sound confident and still be wrong.

Step 3: write one style line and reuse it

Consistency comes from repetition. Write a single style description and paste it, word for word, into every prompt. Change only the part that describes the scene.

For the bakery, the style line might be:

"Soft flat illustration, warm cream and terracotta colour palette, gentle natural light from the left, clean simple background, no text, no logos."

Then each prompt becomes scene plus style line:

• "A freshly baked loaf on a wooden board, plenty of empty space above it. Soft flat illustration, warm cream and terracotta colour palette..."
• "A loaf wrapped in a folded cotton tea towel on a kitchen table. Soft flat illustration, warm cream and terracotta colour palette..."

A few things help the slides match:

• Keep the camera angle the same, for example "seen from slightly above" on every slide.
• Name the colours rather than saying "nice colours".
• Repeat any recurring object exactly, such as "the same round wooden board".
• Say "no text", because AI images are still unreliable at spelling, and you will add the words yourself.

Our guide to writing better AI prompts covers more ways to make instructions specific.

Step 4: generate the slides

Open the AI Image Generator and work through your plan in order. Generate two or three versions of each slide and keep the one that best matches the others, not simply the prettiest one. Lay your favourites side by side in a folder or gallery view as you go. Drift is much easier to spot when the images sit next to each other.

If one slide looks out of place, do not fight it with long new instructions. Go back to the exact style line, simplify the scene description and try again. Small, plain scenes match each other far more easily than busy ones.

Step 5: add text and resize in an editor

With the images chosen, move them into any free design editor or even your phone's photo editor to finish them:

1. Set the canvas to 1080 x 1350 pixels (or 1080 x 1080 if you chose square) and place each image.
2. Add the slide text in the empty space you asked for. Use one font, two sizes at most and the same position on every slide.
3. Keep text short. Most people read a slide in a second or two, so aim for one headline and, at most, one supporting line.
4. Add a small cue to swipe on the cover, such as an arrow or "Swipe for 5 tips".
5. Number the tips so readers know how far they have to go.
6. Export as JPG or PNG and name the files 01, 02, 03 and so on, so they stay in order when you upload.

If you also need a matching image for a blog post or website, the same style line works there too. Our guide on creating blog featured images with AI walks through that process.

Step 6: write the caption and post

The carousel carries the visual story, but the caption still matters. It should add context, not repeat every slide. A good pattern is a one line hook, a sentence on why the tips matter and a clear next step, such as visiting the shop or saving the post for later. Our guide to writing Instagram captions with AI has prompts and examples you can adapt.

When you upload, select the images in order, check that the crop has not cut off any text and preview each slide before sharing. Add alt text to describe each image for people who use screen readers. Instagram offers an alt text option when you share a post.

Common mistakes to avoid

• Mixing shapes. A square cover followed by portrait slides leads to cropping you did not plan for.
• Too much text on one slide. If a slide needs a paragraph, split it into two slides.
• Letting the AI write words inside the image. Spelling errors in a generated sign or label look careless. Add text in an editor instead.
• Changing the style halfway. Edit your style line once, then regenerate every slide, rather than mixing old and new versions.
• Images that mislead. If a generated image could be mistaken for a real photo of your product or shop, say it is an illustration. Our post on labelling AI generated content explains why that builds trust.

A quick checklist

• Slide plan written, one idea per slide.
• One shape chosen, ideally 1080 x 1350 pixels.
• One style line pasted into every prompt.
• Slides compared side by side and outliers regenerated.
• Text added in an editor, same font and position throughout.
• Files numbered in order, alt text written and caption ready.

Frequently asked questions

How many slides should an Instagram carousel have?

Instagram allows up to 20, but most carousels work best with five to ten. Use as many slides as the idea needs and no more, because each extra slide is another chance for people to stop swiping.

What size should carousel images be?

For portrait posts, 1080 x 1350 pixels (a 4:5 ratio) gives you the most space in the feed. For square posts, use 1080 x 1080 pixels. Keep every slide the same shape, because the orientation you choose applies to the whole post.

Can AI put text on the slides for me?

Some generators try, but spelling in AI images is still unreliable. It is quicker and safer to ask for "no text" in your prompt and add the words yourself in an editor.

How do I keep all the slides looking the same?

Reuse one identical style line in every prompt, keep the camera angle and colours fixed and compare the images side by side before you finish them.

Do I need to say the images were made with AI?

Be honest wherever an image could be mistaken for a real photo, especially of a product or place. Instagram and other platforms may also add their own labels to some AI content, so check their current guidance.

Start your first carousel

Pick one topic your followers keep asking about, write a five slide plan and generate the images with a single style line. You can try the AI Image Generator and the AI Writer together for the pictures and the words, and see the TextPixAI plans if you need more credits for regular posting.