How the slides line up
- Each slide is 1,080 × 1,350 pixels, the 4:5 shape that works both in the Instagram app and from scheduling apps.
- The picture is cropped to the shape of all the slides side by side, then cut into equal slides, so each edge meets the next.
- The tool makes up to 10 slides. Instagram takes up to 20 photos and videos in one carousel, so there's room for more after your picture.
For every carousel rule in one place, see the Instagram carousel size guide. To fit one photo to every network instead, use the image resizer.
Before you post
- Post the slides in order, slide 1 first: the feed shows the first slide, with dots under it for the rest.
- In the Instagram app, choose the portrait shape. It applies to every slide, so the edges line up.
- Add alt text that describes the whole picture. Instagram lets you write it before you share, or change it later with Edit, then Accessibility.
- In Unisenda, you add up to 20 photos to one Instagram carousel, drag them into order and schedule it.
Questions people ask
Why 4:5 slides?
4:5 is the tallest shape that works both in the Instagram app and from scheduling apps, so the slides fill as much of the screen as they can wherever you post from. Every slide is 1,080 × 1,350 pixels.
How many slides should I use?
The tool suggests as many as your picture's shape fits. If your picture has fewer pixels than the slides need, they're enlarged and may look soft, and the tool says so.
Will the slides line up on Instagram?
Yes, as long as every slide stays 4:5. In the Instagram app, choose the portrait shape, which applies to every slide. Scheduling apps crop each slide to the first one's shape, and here that's 4:5 too.
Is my picture uploaded?
No. Your browser cuts the slides on your device. Nothing is sent to Unisenda, and nothing is kept once you close the page.
Sources
Checked on 1 November 2026. Instagram changes its rules, so check the source before you rely on a number.
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