Feed posts · carousels · Story frames · no watermark
AI Instagram post generator — feed images at 4:5, 1:1 and 3:4
Describe the post — a product shot, a quote card, a recipe, a travel moment — and get feed-ready images at 4:5, 1:1 or 3:4, a matching 9:16 Story frame, and a carousel set in one style.
- 4:5 · 1:1 · 3:4 · 9:16
- Carousel sets in one style
- Text in the image when you need it
- No watermark
Updated by the Kenerate AI team
On this page
Quick answer
How do you make an Instagram post with AI?
An AI Instagram post generator makes the images for your feed from a description. Instagram keeps photos up to 1080 px wide at their full resolution when the shape is between 1.91:1 and 3:4, so 4:5 (1080 × 1350) portrait and 1:1 square are the safe picks, and 9:16 is for Stories and Reels. On Kenerate AI you make the image in Image Studio with GPT Image 2.5 Sunburst, or a 3–5 card carousel in Marketing Studio. The tools make the pictures; the caption is yours to write, or to draft with the chat agent and check.
Key facts
- Best feed shape
- 4:5 portrait, 1080 × 1350
- Also works
- 1:1 square · 3:4 (up to 1080 × 1440)
- Stories and Reels
- 9:16, 1080 × 1920
- Instagram's width
- Up to 1080 px kept at full resolution
- Carousel
- Up to 20 slides on Instagram · 3–5 card sets in Marketing Studio
- Captions
- Yours to write — the image tools don't write them
- Posting
- Download and post yourself; Kenerate doesn't post or schedule
- Watermark
- None
Formats
Which Instagram post size should you make?
Instagram's help centre gives 1.91:1 to 3:4 as the range it keeps at full resolution, 1080 px wide. Checked 20 Oct 2026.
| Format | Ratio and size | Pick in Kenerate | Use it for |
|---|---|---|---|
| Portrait feed post | 4:5 · 1080 × 1350 | Photo 4:5 in Image Studio · Insta portrait in Edit Studio | Most posts — it takes the most room in the feed |
| Tall feed post | 3:4 · 1080 × 1440 | Portrait 3:4 in Image Studio | The newer tallest feed shape |
| Square post | 1:1 · 1080 × 1080 | Social post preset · Insta post in Edit Studio | Quote cards, product tiles, carousels |
| Landscape post | 1.91:1 · 1080 × 566 | Widescreen 16:9 then crop, or Expand Image | Wide scenery; shows smallest in the feed |
| Story / Reel frame | 9:16 · 1080 × 1920 | Story / Reel preset · Story in Edit Studio | Stories, Reel covers, full-screen frames |
| Carousel | Same ratio on every slide | Carousel set in Marketing Studio, or one ratio in Image Studio | Tips, steps, before/after, product benefits |
Prompts
Instagram post prompts to copy
Pick the ratio in Image Studio first (Photo 4:5, Square 1:1 or Story 9:16). The last prompt needs your first slide uploaded as a reference.
- Subject
- What the post shows
- Shape
- 4:5, 1:1, 3:4 or 9:16
- Look
- Light, colours, mood
- Words
- In quotes, or “no text”
Product post
Instagram feed post, 4:5 portrait. A matte ceramic coffee mug on a sunlit oak table with a croissant and a small vase of dried flowers, soft morning light from a window, warm neutral colours, lots of clean space at the top. No text, no logos.
Quote card
Instagram quote card, square 1:1. Deep green background with a subtle paper texture. In the centre, in a large elegant serif: "Small steps still move you forward." Thin cream border, no other text, generous margins.
Recipe post
Instagram food post, 4:5 portrait, overhead shot of a bowl of lemon garlic pasta with basil on a linen napkin, a wedge of parmesan and a fork beside it, bright natural light, appetising, room at the bottom for a caption overlay. No text.
Carousel cover
First slide of an Instagram carousel, 4:5 portrait. Bold headline "5 desk habits that fix your posture" in big white sans-serif on a coral background, a simple flat illustration of a person sitting upright at a desk, and a small arrow at the right edge. No other text.
More prompts (3)
Event announcement
Instagram post for a community event, 4:5 portrait. A night market street with string lights and food stalls, cinematic photo. Overlay text "Night Market" large at the top and "Saturday 7 PM" smaller below it, both in clean white letters. No other words.
Story frame
Instagram Story frame, 9:16 vertical. A runner tying her shoes on an empty city bridge at sunrise, cinematic, soft orange light, with clear empty sky in the top third for stickers and text. No text.
Same style, next slide
Using the attached carousel slide as the style reference, make slide 2 in exactly the same style, colours, font and layout: headline "1. Raise your screen to eye level" with a simple flat illustration of a laptop on a stand. 4:5 portrait, no other text.
How to
How to use the AI Instagram post generator
- Time needed
- Steps
- 4 steps
Step 1
Open Image Studio
Press “Make a post”. Image Studio opens on GPT Image 2.5 Sunburst. Pick Photo 4:5 (or the Social post preset for 1:1). Sign in free for starter credits.
Step 2
Describe the post
Subject, setting, light and colours. Add any words in quotes, or ask for “no text” and add them later in Edit Studio.
Step 3
Make the set
For a carousel, use Marketing Studio's Carousel set, or upload your first slide as a reference and ask for the next one “in exactly the same style”. Make a 9:16 version for your Story.
Step 4
Caption and post
Download without a watermark, write the caption (or draft it with the chat agent), and post it from the Instagram app or your scheduler.
See it in the app
Open Image Studio and type what you want to see — subject, style, lighting and mood.
Watch the tour · 1:23
Prompts, styles, references, edit, Arena & chat
Chapters
Tips
Posts that look right in the feed
What keeps an AI image from being cropped, blurry or off-brand once it's on Instagram.
Make feed posts at 4:5. It's the shape that takes the most room in the feed and is never cropped.
Keep every slide of a carousel at the same ratio — make them all 4:5 or all 1:1.
If the post has words, put them in quotes in the prompt and keep it to a headline and one short line.
Leave space for the profile grid: important parts in the centre, nothing vital at the very edges.
Write the caption yourself, or ask the chat agent for a draft and edit it so it sounds like you.
Only post claims, prices and offers that are true. Don't put other brands' logos or real people's faces in your posts without permission.
Models
Models and studios for Instagram posts
What each model is good at. Open any one straight in the generator.
OpenAI
GPT Image 2.5 Sunburst
- Reference images
- Up to 16
- Output
- 1K to 4K
Open GPT Image 2.5 SunburstBest for
Default here · words in the image, matching carousel slides
OpenAI
GPT Image 2
- Reference images
- Up to 16
- Output
- 1K to 4K
Open GPT Image 2Best for
Marketing Studio carousel default · accurate text
ByteDance
Seedream 5.0 Pro
- Reference images
- Up to 10
- Output
- Up to 2K
Open Seedream 5.0 ProBest for
Photoreal lifestyle and product scenes
Google
Nano Banana 2.1
- Reference images
- Up to 14
- Output
- Up to 4K
Open Nano Banana 2.1Best for
Your product or character the same in every post
- Free plan
Alibaba
Qwen Image 3.0
- Reference images
- Up to 3
- Output
- 1K or 2K
Open Qwen Image 3.0Best for
Free plan · 4:5, 1:1 and 9:16
FAQ
AI Instagram Post Generator questions
8 questions
What size should an Instagram post be?
Make feed posts 1080 px wide. Instagram's help centre says it keeps photos at full resolution when the shape is between 1.91:1 (landscape) and 3:4 (tall), so 4:5 portrait at 1080 × 1350 and 1:1 square at 1080 × 1080 are safe choices, and 3:4 at 1080 × 1440 is the tallest. Stories and Reels are 9:16, 1080 × 1920.
Link to this answerDoes the AI write my Instagram caption too?
No — the image tools make the pictures, not the caption. Write it yourself, or ask Kenerate's chat agent for a draft and then edit it so it's accurate and sounds like you. Read every caption before you post; AI drafts can get facts, prices or tone wrong.
Link to this answerCan I make an Instagram carousel with AI?
Yes. Marketing Studio's Carousel set makes three to five cards in one style from your product photo — hook first, one benefit per card, the offer last — square by default. Or make slides one by one in Image Studio at the same ratio, uploading the first slide as a reference so the rest match. Instagram allows up to 20 slides per carousel.
Link to this answerIs the AI Instagram post generator free?
Free to start. A new Kenerate account gets 25 free credits, and Qwen Image 3.0 is a free-plan model with 4:5, 1:1 and 9:16. GPT Image 2.5 Sunburst and the other models use credits from one-time packs with no subscription. Marketing Studio's Carousel set needs a paid plan or a credit pack. Downloads have no watermark.
Link to this answerCan AI put text on my Instagram post?
Yes. Put the exact words in quotes and keep them short — a headline and one line. GPT Image 2.5 Sunburst and GPT Image 2 spell short text most reliably. For exact fonts every time, ask for “no text” and add the words in Edit Studio's Text tool, starting from an Insta post or Insta portrait canvas.
Link to this answerHow do I turn a square image into a 4:5 post without cropping?
Open Expand Image, pick 4:5 and the AI paints new image at the top and bottom, so nothing in your original is cut off. You can also make the post at 4:5 from the start by picking Photo 4:5 in Image Studio.
Link to this answerDoes Kenerate post to Instagram for me?
No. Kenerate makes the images and you download them, with no watermark. Post them from the Instagram app, Meta Business Suite or the scheduler you already use. Nothing is published to your account automatically.
Link to this answerCan I use AI images for business posts and ads?
Yes. You can use what you make, including on business accounts; Kenerate adds no watermark. Keep claims true, use only your own products, logos and photos, and don't show real people who haven't agreed. For paid Meta ads in every placement, see the AI Facebook ad generator.
Link to this answerIn depth
AI Instagram Post Generator, explained
What works, what to avoid, and how to pick a model.
On this page
Image Studio, Marketing Studio or Edit Studio?
Three places on Kenerate make Instagram posts; pick by the job:
- Image Studio: any single post from a prompt — product shots, scenes, quote cards — at 4:5, 1:1, 3:4 or 9:16.
- Marketing Studio > Posters > Carousel set: 3–5 matching cards built around your product, with the headline and button in the picture.
- Edit Studio: Instagram-sized canvases (1080 × 1080, 1080 × 1350, 1080 × 1920), templates, a Text tool for exact wording, and Magic Resize to turn one post into a Story.
How do you keep a feed consistent?
Pick two or three colours, one font style and one kind of light, and write them into every prompt as the same sentence. Upload a post you like as a reference when you make the next one. Nano Banana 2.1 and GPT Image 2.5 Sunburst take the most references, which helps a product or a character look the same from post to post.