Quick answer: A carousel post is a single social post made of several swipeable slides, shown as images, video clips or a PDF document. Instagram allows up to 20 items per post, and LinkedIn accepts documents up to 300 pages. For most feeds, a 4:5 portrait slide at 1080×1350 pixels is a common, space-efficient choice.
Key facts
- Instagram's Help Center says you can share up to 20 photos and videos in one feed post.
- The orientation you pick for the first slide applies to every slide in the post.
- LinkedIn document posts accept PDF, PPT, PPTX, DOC and DOCX files up to 100 MB and 300 pages.
- A common Instagram carousel size is 1080×1350 pixels (4:5), which fills more of the feed than a square.
- Publiqa builds LinkedIn carousels of 5 to 10 slides in a 4:5 format.
- An Instagram caption holds 2,200 characters, and a LinkedIn post holds 3,000.
What is a carousel post?
Swipe sideways on a feed post and the next image slides in. That is a carousel post. It packs several slides into one post, with one caption, one set of likes and comments, and one place in the feed.
What is a carousel post on Instagram specifically? It is a feed post with multiple photos or videos. Instagram lets you mix both in one post, up to 20 items. On LinkedIn, the same idea usually arrives as a document post: you upload a PDF, and LinkedIn turns each page into a slide. Facebook, Threads and Pinterest have their own multi-image formats.
The format suits any idea that unfolds in steps: a checklist, a comparison, a mini story, a before-and-after. One-sentence announcements fit it badly. If the point fits in a single image, use a single image.
Why do carousel posts work?
A carousel asks the reader to do something small, which is to swipe. Each swipe is a tiny commitment, and the reader spends more time with your idea than a one-image post allows. That is our reasoning, not a platform statistic. Platforms keep their ranking details private, so treat any "carousels get X times more reach" claim with suspicion unless the source shows its method.
Three practical benefits are easy to see in your own analytics:
- Saves. Checklists and templates invite people to bookmark the post.
- Dwell time. Several slides mean more seconds per viewer.
- Shares. A clear sequence is easy to send to a colleague.
Compare your carousels with your single-image posts over a month. Your own numbers beat anyone's benchmark.
Sizes and specs: Instagram carousel size vs LinkedIn documents
Use one ratio for every slide. The common choice is 1080×1350 px (4:5), because slide one sets the crop for the whole set. LinkedIn documents accept PDF, PPT, PPTX, DOC and DOCX files up to 100 MB and 300 pages. For every Instagram dimension and safe margin, see our Instagram post size guide.
The anatomy of a strong carousel
Most carousels that earn saves share a four-part shape.
- Cover. One promise, in a few words, with a clear visual. The cover decides whether anyone swipes.
- Build. Slides that each carry one point. Number them if the order matters.
- Payoff. The slide where the promise is fulfilled: the result, the summary, the template.
- Call to action. One request. Save, follow, comment a word, or visit a link.
Keep the same grid, fonts and colors throughout, so the set looks like one piece. Aim for 6 to 10 slides in most cases, and go longer only when the content demands it. That length range is our recommendation, not a platform limit.
How do you create a carousel post?
There are three routes, and they trade control against speed.
- Manual design. Build slides in a design tool, export as images or PDF. Maximum control, most time.
- Template tools. Start from a layout, swap text and images. Faster, and the output depends on the template.
- AI-assisted. Give the tool a topic or source article. It writes slide copy and lays out the pages, and you edit. Fastest, but a person must check every claim.
Whichever route you choose, write the copy before the design. Draft one sentence per slide, then cut each by a third.
How do you write carousel copy that gets swiped?
Copy is where most carousels win or lose, so write it before you open a design tool. Start with the cover line. As a rule of thumb, promise a result a stranger would want in about six to eight words, and let the second slide deliver the first step of that promise instead of a long introduction.
Then give every build slide one sentence and one job. If a slide needs a second sentence, ask whether it is really two slides. Use plain verbs, put the number or the noun the reader cares about early, and end each slide so the next one feels like the natural follow-up. A small cue such as "Step 3 of 6" or an arrow near the edge tells people the set continues.
Read the whole sequence aloud once. If you stumble over a slide, a reader on a phone will too. Finally, check that the last slide asks for exactly one thing, and let the caption add context instead of repeating what the slides already say.
How to post a carousel on Instagram
This is the flow in the mobile app. Menu names change slightly across versions.
- Tap the + icon and choose Post.
- Tap the Select multiple icon, then choose up to 20 photos or videos in the order you want.
- Tap Next. Apply a filter or edit each slide if you like.
- Tap Next again. Write the caption, add alt text, tag people and set the location.
- Tap Share.
To post a carousel on Instagram from a scheduler, upload the slide files in order and check that your tool supports multi-image posts, since some limit the count.
How to post a carousel on LinkedIn
LinkedIn's version uses a document.
- Export your slides as a single PDF, one slide per page.
- Start a post and choose the document icon.
- Upload the PDF and give it a title. The title shows above the slides.
- Click Done, write the caption, and post.
The LinkedIn carousel post works best when the first page is a clear cover and the text is large, since most people read on a phone. Our dedicated LinkedIn carousel guide goes deeper on design and timing.
Slide structure
A carousel works best with a clear cover, one idea per slide and one call to action. Give the build slides equal weight, and if one slide needs three sentences, split it in two. Save the payoff for the last third of the set so readers keep swiping to reach it. For ready-made 10-slide layouts with sample copy, see our Instagram carousel templates.
Examples by goal and common mistakes
An Instagram carousel post example for each goal helps you see how the structure flexes.
| Goal | Cover idea | Middle slides | Final slide |
|---|---|---|---|
| Education | "5 mistakes in X" | One mistake and fix per slide | Save this checklist |
| Product | "How feature saves a step" | Problem, demo, result | Link in bio or profile |
| Storytelling | "The week our launch failed" | Timeline of events | What we learned |
Common mistakes are easy to avoid once you know them.
- Text too small. If you need to zoom, you will lose the reader.
- Mixed ratios. The first slide sets the shape, and everything else is cropped to match.
- A weak cover. Slide one carries most of the weight.
- Too many ideas per slide. One point each.
- No call to action. End with a single, specific request.
How do you measure a carousel?
Judge a carousel against your own single-image posts, not against someone else's benchmark. In Instagram Insights and LinkedIn's post analytics, look at the numbers that match your goal: saves and shares for educational sets, comments for opinion sets, and profile visits or link clicks for product sets.
Test one change at a time, such as a new cover line or a shorter set, and give each version a few posts before you decide. Keep a simple log with the date, topic, slide count and result. After a month the pattern is usually visible. That routine is our suggestion, not a platform requirement.
How Publiqa helps with carousel posts
For carousels, Campaign Studio in Publiqa can produce slide copy and branded graphics from the same source as your captions, with your Brand Kit colors and fonts applied. Instagram carousels use the 4:5 format, and LinkedIn carousels run 5 to 10 slides, also in 4:5.
A realistic workflow looks like this: paste an article you have already written, review the extracted thesis, then edit the generated slide copy so that each slide holds one idea. Publiqa's published credit costs list a branded visual graphic at 3 credits, and a campaign with 12 platform versions at about 10 credits. The free trial includes 200 credits.
How the finished set reaches Instagram or LinkedIn depends on the connection you use. Webhooks and headless CMS hand-offs are live; sending slides straight to the networks is still rolling out, so check the channel connections page first. Autopilot is optional, and without it each post waits for your explicit approval. The Publiqa home page gives the wider picture.
Where to go next
Open your last carousel and check it against the four-part anatomy: cover, build, payoff, call to action. Fix the weakest part first. Then pick a topic you can explain in six to ten steps and draft one sentence per slide before opening a design tool. For exact numbers on other formats, our Instagram post size guide lists every dimension. And if you would like help turning one article into a ready slide set, start free with 200 credits. No credit card required.
FAQ
What is a carousel post?
A carousel post is a single social media post made of multiple swipeable slides, which can be images, video clips or pages of a PDF. It has one caption and one set of reactions. It is used for step-by-step guides, comparisons and short stories.
How to post a carousel on Instagram?
Tap the plus icon, choose Post, select the Select multiple icon and pick up to 20 photos or videos in order. Tap Next, edit if needed, write your caption and alt text, then tap Share. All slides follow the first slide's orientation.
What is a carousel post on Instagram?
On Instagram, a carousel post is a feed post that holds up to 20 photos and videos in one swipeable set. People swipe left to move through it. It shares one caption and one tally of likes and comments across all slides.
How to post a carousel on LinkedIn?
Export your slides as one PDF with one slide per page, start a new post, choose the document icon, upload the file and add a title. Then click Done, write your caption and publish. LinkedIn accepts documents up to 100 MB and 300 pages.
How to create a carousel post on Instagram?
Write one sentence per slide first, then design a cover, a build section, a payoff slide and a call to action in a single ratio such as 4:5 at 1080×1350 pixels. Export the slides in order and upload them using the Select multiple option.