How this free Instagram carousel scheduler works
Add up to 10 photos or videos, draft a caption with alt text per slide, and set a publish time. Postmixr sends the carousel to the Instagram Graph API as a single scheduled post.
Instagram carousel specs and best practices
Carousels accept up to 10 mixed media items at 1:1 or 4:5 aspect ratios. Consistent sizing across slides makes swiping smoother. The first slide is your hook — use it for the strongest visual or headline.
- Educational carousels often perform well: one idea per slide, CTA on the last slide.
- Add alt text to every item for accessibility and search.
- Schedule a first comment for hashtags so the caption stays clean.