The AI Instagram post generator that writes and shoots it
Not just carousels — Caruva makes single Instagram posts too. Type an idea and it writes the caption and generates an original image sized for the feed, ready to post in minutes.
Describe your idea…
Free to try — no card required
Real output
Generated by Caruva. Not a stock template.
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4/4Generated by Caruva for Instagram — caption and image from a single prompt.
Caption + image, together
Caruva writes an Instagram-tuned caption and generates an original image to go with it — one idea in, a complete post out, with the caption auto-copied.
Posts and carousels
Need a single image post today and a swipeable carousel tomorrow? Caruva does both — switch the format and it sizes and structures everything for Instagram.
Feed-perfect sizing
Single posts render at Instagram’s feed sizes (1:1 and 4:5) so nothing gets awkwardly cropped — sharp on every phone.
From idea to posted in three steps
Type your idea
“a motivational post about starting before you feel ready” — one line is enough.
Generate the post
Caruva writes the caption and generates a matching image, sized for the Instagram feed.
Copy & post
Export the image, paste the copied caption, publish — or switch to carousel mode for a multi-slide post.
See it in action
Frequently asked
Does this generate single Instagram posts or only carousels?+
Both. Caruva makes single image posts — writing the caption and generating the image together — and multi-slide carousels. Pick the format and it sizes and structures the output for Instagram either way.
What size are the Instagram posts?+
Single feed posts export at 1:1 (1080×1080) and 4:5 (1080×1350) — Instagram’s preferred feed sizes — so images stay sharp and uncropped. Carousels use the same portrait and square sizing, and stories use 9:16.
Does it write the caption too?+
Yes. The generator writes an Instagram-native caption alongside the image, with optional hashtags, and copies it with one click so you can paste it straight into the app.
Can I use my own photo instead of an AI image?+
Yes — upload your own photo and Caruva builds the post around it and still writes the caption, or let it generate an original image for you. Great for products, food and personal brands.
Is the AI Instagram post generator free?+
Yes — free generations with AI images on your first runs, no credit card required. Paid plans from €9/month add watermark-free full-resolution exports and a larger monthly AI-image budget.
Guides & how-tos
How to make an Instagram carousel people actually swipe through
Sizing, structure, hooks and design — the parts that actually decide whether someone swipes past slide one.
Cheat sheetSocial media image sizes in 2026: the only cheat sheet you need
Carousels, posts and stories across Instagram, TikTok, LinkedIn and X — the exact pixels to design at.
PlaybookHow to write hooks that stop the scroll (with templates)
Why the first line is the whole game — the angles that work, and templates you can steal.