How to extend a photo with AI to fit any platform

To extend a photo with AI, an image model generates new pixels past the original edges, so one shot can fill the shape each platform asks for without cropping or stretching the subject. A vertical product photo can become a wide website banner, a tall story frame or a square feed post, all from the same picture. The Minimalist Skincare Advertisement Banner template in Picsart Flow shows the whole move on one canvas.

Out of the box, the template extends a portrait product photo into a 16:9 banner and sets a headline and button into the new space. Change the aspect ratio and the direction in one prompt, and the same canvas produces the other formats.

The technical name for this is outpainting, and many tools call it uncrop. Below: what it can and cannot do, which shape each platform wants, and a step-by-step run with your own photo.

What extending a photo with AI adds, and what it cannot bring back

Cropping a photo to fit a new format throws pixels away, and a product near the edge loses its cap or its label. Stretching keeps the pixels but drags them, so a round jar turns oval. Extending an image is the third option: the original stays untouched and fresh pixels grow around it.

So what is outpainting, exactly? The model reads the light, texture and colour at the edge of the frame and continues them outward, like a set painter extending a backdrop. A wall keeps its tone, a shelf keeps its line, a shadow keeps falling the same way.

The honest part matters. AI image extension invents plausible background. It cannot recover what a crop removed or what the camera never captured, so trying to uncrop a photo someone else trimmed returns a convincing guess, not the missing scene. For product shots on a wall or a studio backdrop, that guess only needs to be clean and believable.

One photo, many shapes: what each platform asks for

Every platform frames content differently, and a single shoot rarely matches all of them. The sample photo in the template is 4:5, the tall rectangle feeds favour. Here is where the other common shapes show up and which way a 4:5 shot has to grow to reach them.

Nano Banana 2, the model running both generation passes in the template, accepts all of these ratios in Picsart Flow. The direction column is the part that needs a human decision, because it decides where the empty space lands.

Why the prompt names a direction

The outpaint pass runs Nano Banana 2 at 16:9, and its prompt is one tidy instruction: “Extend background to the left. Keep the products unchanged and leave clean empty space for advertising text.”

“To the left” is the layout decision. A 4:5 photo kept at the full height of a 16:9 frame covers only about 45% of its width, so more than half the banner is new pixels. One-sided extension pushes the product to the right and leaves a broad, quiet block on the left, where left-aligned copy reads first.

Every format needs its own version of that sentence. A story frame wants space above and below, a square post wants a little air on both sides. “Keep the products unchanged” stays in every version, because it is the line that protects the label.

How to extend a photo for different platforms in Picsart Flow

Open the extend photo AI template and it lands straight in the Flow editor with the sample photo and copy already wired in. Four step notes sit across the top of the canvas, and each one matches a node below it: Product Image, Outpainted Image, Advertising Text and Final Product Ad. Run the sample once before changing anything, so you can watch both passes fire in order.

Adjusting the copy node for each format

The Advertising Text node is a copy brief that reaches the model only in the second pass. In the sample it holds the headline “HYDRATION, SIMPLIFIED.”, the subheading “Daily care for soft, balanced skin.” and the button “SHOP LUNÉRA”, for an invented sample brand.

It also sets the hierarchy (a large two-line headline, a smaller subheading, a compact button), the fonts (Cormorant Garamond SemiBold and Montserrat), the dark-olive type colour, and a line telling the model to keep the products and background unchanged.

Tall formats leave less width, so shorten the headline before switching to 9:16. The Outpainted Image node always holds a clean, text-free version too. Download it from that node for platforms where the caption carries the message.

Extend your first photo for every feed

Extending a photo with AI turns one product shot into the shape each platform asks for, without a reshoot. Open the extend photo AI template, run the 16:9 banner on the sample, then switch the ratio and direction for every other format you post to.