Free creator tool
Instagram Carousel Splitter
Upload a wide panorama
One continuous image, wider than it is tall — a skyline, a long quote card, a landscape shot.
PNG, JPG, or WEBP up to 25MB
Upload a panorama to see the cuts
A carousel splitter cuts one wide image into equal slides that Instagram plays back as a single swipeable post — unlike the grid generator, which slices a square image for the 3-wide profile wall.
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Connect 14+ channels (including Bluesky, Threads, and Reddit) in one dashboard. Schedule your content once, let Postonus auto-repurpose it native to every network.
No card until you publish.
Why people use it
- Cut one wide panorama into 2-10 swipeable carousel slides instead of a profile-wall grid.
- See the real swipe experience before you export — snap-scrolling slides with the dots your followers will actually see.
- Turn on edge bleed so the seam between slides reads as continuous once Instagram adds its own gap.
Suggested flow
- 01
Upload the panorama
Start with one continuous wide image — a skyline, a long quote, a landscape shot.
- 02
Set slides and size
Pick a slide count from 2 to 10 and an output size, then check the live seam and swipe previews.
- 03
Export in order
Download numbered slides or one ZIP, then upload them to Instagram in the same order.
About this tool
Split a panorama into an Instagram carousel that swipes cleanly
The carousel splitter cuts a wide image into evenly sized, correctly cropped slides and shows the swipe-through result before you export — the preview post-bridge's splitter doesn't have.
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Questions
Frequently asked questions Everything the first evaluation usually needs.
- What if I'm already on Buffer / Pallyy / Publer?
Keep them. Run Postonus side-by-side for 30 days. Put your 3 best posts into a Growth Workflow. If it isn't earning its keep, cancel us — not them.
- Does the AI write my posts?
No. You write the post. Postonus's AI re-fits your draft into each platform's native shape — character limits, tone, hashtag norms. You review every variant before it publishes. Voice profile keeps it sounding like you.
- Which platforms do you support?
Fourteen: Instagram, TikTok, YouTube, LinkedIn, Facebook, X, Threads, Pinterest, Bluesky, Reddit, Telegram, Discord, Google Business Profile, and Tumblr. WhatsApp Groups support is in beta.
- How does the free workspace and the 14-day trial work?
Sign up with no card and you get a free workspace: up to 3 connected channels, unlimited writing, and dated drafts on the calendar. Scheduling and publishing need a card. Adding one starts a 14-day trial on the plan you pick — nothing is charged until day 15, and your drafts are already there waiting.
- Can I import from another tool?
Yes. Bulk CSV import handles up to 50 posts per file (multiple files OK). Direct-from-Buffer import is on the Q4 roadmap.
- What happens if a post fails to publish?
Workers retry with exponential backoff. Failures show up in the Activity Feed with one-click retry. We email you only for unrecoverable failures (e.g. revoked token).