How to make a carousel post, step by step
A carousel is simply a post with several slides that people swipe through. Here is a calm, step-by-step way to build one in PostCRSL, from the first idea to the files you upload.
Step 1: Choose how to start
When you open the editor, you can start in three ways:
- From a template. Good when you want a finished layout and only need to swap in your own photos and words. Browse the template gallery by category, such as birthdays, travel, photo dumps, business or seasonal events.
- From your photos or videos. Pick a set of files and the editor places them on pages for you, ready to arrange.
- From a blank page. Best when you already have a clear layout in mind.
Every template is free to open and edit. Templates marked Pro only need Pro when you export.
Step 2: Set the aspect ratio and page count
Decide where the post will live before you design. A post can have 1 to 20 pages, and you can pick one of eight aspect ratios: 4:5, 1:1, 9:16, 3:4, 4:3, 16:9, 2:3 and 3:2. A portrait 4:5 or a square 1:1 is a common choice for feed carousels, while 9:16 suits full-screen formats. If you are unsure, read our guide to choosing an aspect ratio.
You can change the ratio later, but settling it early saves you from re-cropping every page.
Step 3: Build each page
Work through the pages one at a time:
- Add photos, short video clips and text.
- Move, scale and rotate items until the layout feels balanced.
- Crop photos so the subject sits where you want it.
- Set a background color for pages that need a calm base.
- Use layers to bring text in front of a photo, or send a shape behind it.
Add, remove and reorder pages as the post takes shape. Undo and redo are always there, so it is safe to experiment.
Step 4: Check the flow
Before exporting, step through the pages in order as a viewer would. Ask yourself:
- Does the first page make someone want to swipe?
- Is the text readable at phone size?
- Does the style stay consistent from page to page?
- Does the last page feel like an ending?
Small fixes here, like trimming a sentence or swapping two pages, often make the biggest difference.
Step 5: Export
You have two export options:
- Images: one JPEG or PNG per page, downloaded together as a ZIP in page order. This is the usual choice for a swipeable carousel.
- Video: one MP4 file (H.264 with AAC audio). Photo-only pages last 2, 3 or 4 seconds, your choice, and pages with a clip last as long as the longest clip on that page.
Then upload the files to your platform in the same order.
A note on saving your work
The editor runs in your browser, and your photos and projects stay on your device rather than being uploaded to a server. That also means clearing your browser's site data deletes your projects, so download a backup file for anything you want to keep.
Quick answers
How many slides can a carousel have?
In the editor a post can have from 1 to 20 pages. Each platform also sets its own limit, so check its help page before you plan a long post.
Do I need an account to start?
You can open the editor in your browser and start from a template, your photos or a blank page. Your work is stored locally on your device.
Can I change the aspect ratio after I start?
Yes. You can change it at any time, but you may need to adjust crops and positions on each page afterwards.
















