Instagram carousel maker with text that never breaks.
Postiva turns a blog post, article, or pasted text into a set of branded Instagram carousel slides, exported as separate PNG files at 1080x1350, 1080x1080, or 1080x1920. Every slide is drawn to exact pixel dimensions, so text never overflows the frame or lands on top of your logo. The same run also writes the caption, the TikTok script, the Facebook post, the LinkedIn variants, the X thread, and the newsletter section.
The slides are rendered by a layout engine rather than painted by an image model. That is deliberate: it is the only way to promise the copy fits.
No credit card for the trial. Every plan includes all six platforms.
You came for the carousel slides. The rest come with it.
Postiva writes every platform you keep from the same source in a single run. Not one tool at a time, and not one generation each.
Source
One URL or pasted text
yoursite.com/blog/the-post-you-just-published
One generation
Carousel slides, caption, hashtags, and a call to action.
Two post variants: a professional one and a founder voice.
A hook, a five to eight post thread, and a standalone post.
One conversational post written for the feed.
A hook, a spoken script, on-screen text, and the caption.
Script, hook, and on-screen text to film yourself. Postiva does not record video.
Three subject lines, an email-ready body, and a CTA.
Every platform is selected by default, and one generation covers all of them whether you keep one or all six. Instagram carousel slides are rendered and zipped in the same run at no extra cost. AI post images, voiceovers, and lead magnet PDFs have their own separate allowances.
Three steps, start to finished.
- 01
Paste a URL and pick a template
Choose one of the built-in templates, or one of your own analyzed styles. A team with a single brand kit gets it selected automatically.
- 02
Postiva writes the slides
The slide count defaults to automatic, where the AI picks between 3 and 10 slides based on how much the source actually has to say. Set an exact number when you need one.
- 03
Download the files
Each slide arrives as its own PNG at the exact size you chose. Take them one at a time or as a ZIP, and find the caption plus every other platform you kept in the same project.
Real image files, at the exact pixel sizes.
The carousel renderer controls dimensions, margins, wrapping, font sizes, logo placement, and exports. Nothing about the layout is left to chance.
Separate files, never a sprite sheet
One PNG per slide, ready to upload in order. Postiva never exports all your slides baked into a single wide image.
Three formats
1080x1350 portrait, 1080x1080 square, and 1080x1920 story. Pick the one you post in and the renderer targets it exactly.
Text that actually fits
The renderer measures every line, wraps it, falls back to a smaller font size, shortens copy that runs long, and suggests another slide when the count is too low. No overlapping text and no cut-off words.
Your brand on every slide
Logo, primary and secondary colors, font style, social handle, and CTA text come straight from your brand kit and land in the same place every time.
An MP4 slideshow
Render the finished carousel into a video in the same format. If you generated an AI voiceover, it becomes the audio track and the slide timing stretches to match the narration.
Canva draws. ChatGPT writes. Neither one does both.
The reason carousels eat a whole morning is that the writing tool and the design tool are different tools, and you are the integration between them.
ChatGPT writes slide text but cannot render it into image files at exact dimensions, so you still rebuild every slide by hand afterwards.
Canva renders beautifully, but you place each text box yourself, on every slide, every week, and you find out about overflow by looking at it.
Postiva writes the copy and draws the slides in one run, then fits the text automatically instead of asking you to check.
Upload a carousel you already designed and Postiva learns its look, so your existing style becomes a reusable template rather than something you rebuild.
Built for people who publish every single week.
Postiva earns its place when content is a recurring job rather than a one-off. These are the people who feel that most.
Marketing and SEO agencies
Run every client from one workspace, keep a separate brand kit per client, and send finished work out on an approval link before anything goes live.
Freelancers and consultants
Turn the article you just wrote into a week of posts without opening a design tool or a second AI chat.
SaaS founders
Your changelog, docs, and blog already say something worth reading. This gets that onto the feeds without hiring for it.
Social media managers
Stop rewriting the same idea six times. One source, six native versions, all saved and reopenable.
One source also becomes everything else.
Every tool here runs off the same paste. Pick the platforms you want before you generate and they all come back together.
Every plan includes every feature.
The plan sets how much you generate each month and how much storage you keep, not which tools you can open. Prices are in USD and billed through Paddle.
Starter
$15/month
30 projects a month, with 2 GB of kept assets.
Pro
$29/month
100 projects a month, with 10 GB of kept assets.
Agency
$79/month
400 projects a month, with 50 GB of kept assets.
Every team starts on a 14-day trial without a credit card. See the full pricing breakdown, including yearly billing with two months free.
What people ask before they start.
What sizes does the carousel maker export?
Three: 1080x1350 for portrait, 1080x1080 for square, and 1080x1920 for stories. You choose the format before generating and every slide is rendered to those exact pixels.
Do I have to run each tool separately?
No, and this is the part most people miss. Every platform is selected by default when you create a project, and Postiva writes all of them from your source in a single run. One generation covers the whole set, whether you keep one platform or all six, so running the carousel, the caption, the TikTok script, the Facebook post, the LinkedIn variants, the X thread, and the newsletter section costs exactly the same as running just one. Instagram carousel slides are rendered and zipped in that same run at no extra cost. AI post images, voiceovers, and lead magnet PDFs are the exceptions: each has its own allowance.
Do I get separate images or one long file?
Separate images, always. Each slide is its own PNG file, and you can download them individually or take the full set as a ZIP. Postiva never exports a single sprite sheet with all the slides side by side.
How many slides does it make?
Between 3 and 10 by default, picked automatically from how much content the source has. You can override it and set an exact slide count whenever you want a specific length.
Can I use my own carousel design?
Yes. Upload the slides of a carousel you already designed and Postiva analyzes its colors, alignment, text placement, font feel, and writing style into a reusable style profile. New carousels follow that look and are drawn by the same renderer, so the text still fits.
Will the text ever overflow the slide?
No. Text fitting is handled before anything is drawn: maximum characters per slide, maximum lines per block, wrapping, font-size fallback, overflow detection, and shortening. When copy will not fit at all, Postiva suggests adding a slide rather than shrinking it into unreadability.
Is there a free carousel maker plan?
There is a 14-day trial with no credit card, which includes carousel generation. After that, plans start at $15 a month. There is no permanently free tier.
Your next content run
A week of content is hiding in something you already made.
Paste the URL. Pick the channels. Let Postiva turn the useful thinking into a campaign your team can actually ship.
Start your first content run14-day free trial. No credit card required.