{"id":268174,"date":"2026-10-20T01:12:05","date_gmt":"2026-10-20T08:12:05","guid":{"rendered":"https:\/\/picsart.com\/blog\/?p=268174"},"modified":"2026-10-20T01:12:05","modified_gmt":"2026-10-20T08:12:05","slug":"how-to-extend-a-photo-with-ai","status":"publish","type":"post","link":"https:\/\/picsart.com\/blog\/how-to-extend-a-photo-with-ai\/","title":{"rendered":"How to extend a photo with AI to fit any platform"},"content":{"rendered":"

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.<\/strong> 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<\/a> shows the whole move on one canvas.<\/p>\n

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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.<\/p>\n

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.<\/p>\n

What extending a photo with AI adds, and what it cannot bring back<\/span><\/h2>\n

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.<\/p>\n

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.<\/p>\n

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.<\/p>\n

One photo, many shapes: what each platform asks for<\/span><\/h2>\n

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.<\/p>\n

\n\n\n\n\n\n\n\n\n
Shape<\/th>\nWhere it shows up<\/th>\nExtend a 4:5 photo<\/th>\n<\/tr>\n
16:9<\/td>\nYouTube thumbnails, website hero banners, presentations<\/td>\nSideways, the template’s default<\/td>\n<\/tr>\n
21:9<\/td>\nExtra-wide web headers and banners<\/td>\nSideways, much further<\/td>\n<\/tr>\n
1:1<\/td>\nSquare feed posts, marketplace and profile tiles<\/td>\nSlightly sideways<\/td>\n<\/tr>\n
9:16<\/td>\nStories, Reels, TikTok and Shorts<\/td>\nUp and down<\/td>\n<\/tr>\n
4:5<\/td>\nFeed posts<\/td>\nNo extension needed<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/figure>\n

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.<\/p>\n

Why the prompt names a direction<\/span><\/h2>\n

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.”<\/p>\n

“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.<\/p>\n

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.<\/p>\n

How to extend a photo for different platforms in Picsart Flow<\/span><\/h2>\n

Open the extend photo AI template<\/a> and it lands straight in the Flow editor<\/a> 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.<\/p>\n

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Extend a photo for each platform in 5 steps<\/h2>\n \n
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\n 1.<\/span>\n Upload your image <\/p>\n

Replace the sample in the Product Image node with your own shot. A plain or simple background and the whole product inside the frame give the cleanest extension.<\/p>\n <\/div>\n <\/div>\n

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\n 2.<\/span>\n Pick the platform's shape <\/p>\n

Select the Outpainted Image node and click the ratio chip under the prompt, which reads 16:9 as shipped. Choose the shape for the platform, such as 9:16 for a story, and set the same ratio on the Final Product Ad node.<\/p>\n <\/div>\n <\/div>\n

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\n 3.<\/span>\n Outpaint the image <\/p>\n

Edit the first sentence of the outpaint prompt so the direction matches the shape, for example "Extend background upward and downward" for 9:16. Keep "Keep the products unchanged" in place, since that line holds the product steady.<\/p>\n <\/div>\n <\/div>\n

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\n 4.<\/span>\n Customize the advertising text <\/p>\n

Open the Advertising Text node and edit the headline, supporting text and button text. The same node sets the fonts, colours and layout, so change "left-aligned" to match where the new space opens.<\/p>\n <\/div>\n <\/div>\n

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\n 5.<\/span>\n Generate the final ad and download it <\/p>\n

Run the canvas and check the Outpainted Image result first: the label, the seam and the size of the empty block. Then select the Final Product Ad node and use the download button in its toolbar. Repeat steps 2 to 5 for each platform. Saving and downloading need a signed-in Picsart account.<\/p>\n <\/div>\n <\/div>\n <\/div>\n <\/section>\n\n