Instagram Carousel Text Splitter

Twenty in the Instagram app, ten through the publishing API. Instagram's Help Center states that you can share a post with up to 20 photos and videos as a single post, on a page that carries no date, so read it as current rather than as an event. Meta's Content Publishing documentation, opened the same day, states that carousels are limited to 10 images, videos, or a mix of the two. Neither is out of date. They describe different surfaces: the first is what you can do by hand in the app, the second is what any third party tool can publish for you. By hand you have 20 slides. Through a tool you have 10.

No. Fifteen was a test, not a limit, and Instagram never published the number. It surfaced on 13 March 2024, when Lia Haberman posted a screenshot of an in-app notice on Threads and wrote that you may soon be able to share up to 15 photos or videos in a carousel. Social Media Today picked it up the next day, and in that coverage Meta said only that it was testing the ability to add more than ten photos with a small group of people. More than ten, never fifteen. Five months later Adam Mosseri announced twenty for everyone. No Instagram blog post, help article or developer page has ever printed fifteen.

Instagram publishes no figure, so anyone quoting one is quoting themselves. This tool builds its budget from two parts and labels both. The first is characters per line, where WCAG 2.1 success criterion 1.4.8 caps a block of text at 80, Matthew Butterick's Practical Typography gives 45 to 90, and Baymard Institute gives 50 to 75 with 50 to 60 optimal. Fifty sits inside all three. The second is lines per slide, a craft call about how much a reader takes in one swipe. Two lines gives 100 characters, four gives 200, six gives 300. For scale, the budgets shipped by the tools tested here run from 80 to 1,000 characters, and not one cites a source.

Cut it before you design it. Paste the post, set the text size, and read where the splits land. Anything that fits one slide is one idea. Anything needing three slides is usually three ideas that sat in one paragraph for a reader who could scroll. Delete rather than shrink the type, because a run of twenty dense slides loses people before the end. Once the text is settled, write the caption with the caption generator, and use the caption formatter if you need line breaks to survive posting. Design last. The layout question answers itself once the text is in pieces.

No. It is a rule based splitter, so the same text with the same settings always produces the same slides. The rules are short enough to state in full: blank lines and list markers are hard breaks, a sentence ends at a full stop, question mark or exclamation mark followed by a space and a capital, a short list of abbreviations such as e.g. and i.e. is skipped, and sentences are packed into a slide until the next will not fit. A sentence longer than the whole budget is the only case that breaks mid sentence, and even then it breaks between words. Nothing is sent anywhere: no upload, no account, no stored copy.

1080 by 1350 pixels is the usual choice and it is still supported. Instagram's Help Center article on image resolution states that a photo keeps its original resolution at a width of 1,080 pixels with a height between 566 and 1,440 pixels, so a 1080 by 1350 slide sits inside that. Two further lines from the Help Center are worth knowing before you build. The orientation you pick applies to the whole post, so you cannot mix a portrait slide with a landscape slide in one carousel. And a video inside a carousel is not treated as a reel, so it will not appear in the Reels tab. Both come from Meta's own documentation (August 2026).

Because Meta's publishing API caps carousels at 10. The Content Publishing documentation states that carousels are limited to 10 images, videos, or a mix of the two, and the Instagram Platform changelog, which is actively maintained and carried entries in June 2026, has never recorded a change to that number since carousel publishing was added on 15 March 2022. Every scheduling tool that posts on your behalf goes through that API, so the cap is inherited rather than chosen. It is not a bug and no plan upgrade removes it. If your draft needs eleven or more slides, post it by hand or make it two posts.

The first slide has one job, which is to earn the first swipe, and the last has one job, which is to name a single action. This tool fills both from fixed patterns: four hook shapes, one of which counts your own slides back to you, and four asks covering save, comment, follow and a straight question. They are starting points rather than finished lines. If you want to work on the opening properly, the hook generator goes deeper on first line craft than a fixed pattern can. The rule worth keeping is that a closing slide asking for a save, a follow and a comment tends to collect none of the three.

Fourteen, opened and used on 2 August 2026. Twelve take text. Three split it deterministically and show a per-slide character count: InstantDM, Brand Update and CreatorFlow. Contentdrips splits where you type a marker yourself. PostNitro, Predis, WaveGen, aiCarousels, CarouselMaker and GravityWrite generate with a model, Pixlr is a canvas editor, and Splitext is an iOS app that could not be tested in a browser. Renderfire and Postplanify split an image rather than text. Five of the fourteen state a slide limit and two, Pixlr and Renderfire, still say ten. None compares your slide count to any limit. Piktochart, Canva and splitimage.im blocked automated access, so they are excluded rather than counted.