Instagram Carousel Posts: Complete Guide (Up to 20 Slides in 2026)
Short answer: an Instagram carousel holds up to 20 photos or videos posted from the app (raised from 10 in 2024). You can mix photos and videos, add music to a photo-only carousel, and, since 2026, reorder or delete slides after publishing without losing likes and comments. You still cannot add a new slide to a published carousel. Third-party schedulers are capped at 10 slides, because that is Meta's API limit, not Instagram's.
Design at 1080 x 1350 px (4:5): it takes the most feed space, and Instagram's profile grid crops every post to 3:4, so a 4:5 slide only loses a thin strip from the sides.
Jump to: What changed · Specs · How to post · Editing after posting · Music · Scheduling and the 10-slide API limit · Hashtags · Best practices · Analytics · FAQ
What Changed in 2025 and 2026
Most carousel guides still describe the 2022 version of the format. Four things moved:
Instagram's audio on a photo carousel does not autoplay in the feed. It starts when someone taps into the post and swipes.
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Carousel Specs at a Glance
Aspect ratios and slide counts above are Instagram's published behaviour. Exact maximum file sizes are not documented by Meta for in-app uploads, so any "30 MB" or "4 GB" figure you see elsewhere is a community estimate, and this guide will not repeat it as fact.
How to Post a Carousel
- Tap +, then Post.
- Tap the Select Multiple icon (two stacked squares).
- Pick up to 20 photos or videos in the order you want them shown. Tap the first one carefully: it sets the aspect ratio for the whole post.
- Edit slides. You can apply one filter to everything or edit each slide individually.
- Write the caption, add up to 5 hashtags, tag products if you sell on Instagram.
- Optionally open Add music (photo carousels of 2 or more slides).
- Optionally open Advanced settings (iOS) or More options (Android) and toggle Schedule this post.
- Tap Share.
Editing a Carousel After Posting
This is where most guides are now wrong. On a published carousel you can:
- Reorder slides. Open the post, tap the three dots, Edit, then long-press a slide and drag it.
- Delete a slide. In the same Edit view, remove the slide you no longer want. A carousel must keep at least two slides, and the deletion cannot be undone after you save.
- Edit the caption, alt text, tags and location, as before.
None of these edits reset likes, comments, saves or shares.
What you still cannot do: add a new slide, swap an existing image or video for a different file, or change the music track. If you need a new slide, you have to repost.
Adding Music to a Carousel
Photo carousels can carry a soundtrack. Select at least two images, and on the final editing screen tap Add music, then pick from Instagram's audio library. The track plays when a viewer opens the post and swipes, not while they scroll past it.
Two limits worth knowing: the option is mobile app only (the desktop uploader does not offer it), and the track cannot be changed once the post is live.
Scheduling Carousels and the 10-Slide API Limit
Two routes, two different ceilings.
In the app (20 slides). Since 1 March 2026, any public Instagram account can schedule natively, no Business or Creator conversion required. The toggle sits under Advanced settings during post creation. The native limits are 25 posts per day, up to 75 days ahead, and posts, carousels and Reels are all supported. Private accounts are excluded, which is the usual reason the toggle does not appear.
Through a scheduler (10 slides). Every third-party tool, including SocialRails, publishes through Meta's Instagram Content Publishing API, and that API states plainly: "Carousels are limited to 10 images, videos, or a mix of the two." No tool can raise this, so treat any product advertising 20-slide scheduling with suspicion.
The other API constraints that surprise people:
- JPEG only. PNG and HEIC uploads have to be converted before they reach Instagram. Extended JPEG variants such as MPO and JPS are rejected.
- 50 published posts per 24 hours per account. A carousel counts as one post, not as 10.
- The API crops carousel images against the first image, defaulting to 1:1 if it cannot infer a ratio, so upload every slide pre-cropped rather than trusting the crop.
If a carousel genuinely needs 11 to 20 slides, schedule the caption work in your tool and publish that one post by hand, or split it into two carousels.
The 5-Hashtag Cap
Instagram announced on 18 December 2025 that posts are limited to five hashtags, saying that "using fewer (up to 5) more targeted hashtags, rather than many generic ones, can improve both your content's performance and people's experience on Instagram." Advice to stack 20 or 30 tags under a carousel is now not just weak, it is impossible.
Adam Mosseri has repeatedly said hashtags help Instagram categorise a post and surface it in search, not expand its reach. Treat your five as descriptive labels, and put the discovery effort into a keyword-rich caption and readable on-slide text. Our hashtag strategy guide covers how to pick them.
Design and Content Best Practices
Slide 1 does the work. It is the only slide most people see, and it is also the thumbnail your profile grid crops to 3:4. Keep the headline and any face away from the outer edges.
Keep one ratio. Because the first slide locks the ratio, build every slide at the same dimensions in your design tool. Mixed dimensions get silently cropped, which is how text ends up cut off.
Earn the swipe. Open with a hook or a problem, resolve it across the middle slides, close with one clear action. Partial arrows or images that bleed across the slide edge give a visual reason to keep going.
Do not pad it. Twenty slots is a ceiling, not a target. Cut any slide that does not add information.
Caption the video slides. Videos in a carousel start muted, so on-screen text is not optional.
Repurpose deliberately. The same 4:5 deck works as a LinkedIn document post and as Facebook carousel content, where the specs differ. Individual slides make good Stories.
Need slide ideas or a structure to start from, see our Instagram carousel ideas guide and these high-converting carousel examples. To slice one wide image into evenly cut slides, use the free image splitter.
Measuring Carousel Performance
Open the post and tap View insights. For a carousel you get post-level numbers: accounts reached, interactions (likes, comments, saves, shares), profile activity and follows.
Be sceptical of guides promising per-slide drop-off charts. Instagram does not publish a documented slide-by-slide breakdown in Insights, and what surfaces varies by account and rollout. The reliable read is comparative: post the same topic as a carousel and as a single image, and watch saves and shares, which are the strongest signals the format is doing its job.
On reach, Hootsuite's own data puts carousels at roughly 1.4x the reach of single-image posts, and Mosseri has said carousels tend to reach further because more media means more chances to interact. That 1.4x figure is Hootsuite's measurement, not an Instagram-published statistic, so treat it as directional. Also see how to get more views on Instagram and how to get more Instagram likes.
Common Carousel Mistakes
- A weak first slide. No hook, no swipe, and a bad grid thumbnail as well.
- Mixed slide dimensions. Instagram crops to the first slide without warning.
- Assuming you can fix it later. You can reorder and delete, but you cannot add or replace a slide.
- Wall-to-wall text. Design for a phone screen held at arm's length.
- Old hashtag habits. Six or more tags will not save; five is the cap.
- Expecting a scheduler to post 20 slides. The API stops at 10.
Frequently Asked Questions
How many photos can you put in an Instagram carousel?
Up to 20 photos or videos in a single carousel when you post from the Instagram app, raised from the original limit of 10 in 2024. You can mix photos and videos freely. Third-party scheduling tools are capped at 10 slides because Meta's Instagram Content Publishing API limits carousels to 10 items.
Can you edit an Instagram carousel after posting?
Yes. On a published carousel you can reorder slides by long-pressing and dragging them in the Edit view, delete slides down to a minimum of two, and edit the caption, alt text, tags and location. None of these edits reset likes, comments, saves or shares. Deleting a slide cannot be undone once saved.
Can you add a photo to a carousel after posting?
No. Adding a new slide to a published carousel is not supported, and neither is swapping an existing image or video for a different file. You can only remove or reorder what is already there, so a missing slide means reposting the carousel.
How do I add music to an Instagram carousel?
Select at least two photos, then tap Add music on the final editing screen and choose a track from Instagram's audio library. The audio plays when someone opens the post and swipes rather than autoplaying in the feed. The option is available in the mobile app only, and the track cannot be changed after publishing.
What is the best size for Instagram carousel posts?
1080 x 1350 pixels, the 4:5 portrait ratio. It occupies the most vertical space in the feed, and because Instagram crops profile grid thumbnails to 3:4, a 4:5 slide only loses a thin strip from each side. Square 1080 x 1080 and landscape 1.91:1 are also supported, and the first slide sets the ratio for the whole carousel.
How many hashtags can you use on an Instagram carousel?
Five. Instagram announced in December 2025 that it would gradually reduce the caption limit for posts and reels to five, saying fewer and more targeted hashtags improve both performance and the experience on Instagram. Advice to add 20 or 30 hashtags to a carousel is out of date.
Why do scheduling tools only allow 10 carousel slides?
Because Meta's Instagram Content Publishing API, which every third-party scheduler uses, states that carousels are limited to 10 images, videos, or a mix of the two. The 20-slide limit applies only to posting inside the Instagram app. No scheduling tool can raise the API ceiling, so an 11-to-20-slide carousel has to be published manually.
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