# AI Image Expander > An AI image expander enlarges a photo's canvas and paints new scenery into the added space, and Kenerate's Expand Image gives you 5 models to do it. Pick Nano Banana 2 for faces and products, Nano Banana 2 Fast for the largest file (about 4 MP), and GPT Image 2 when lettering sits near an edge. URL: https://kenerateai.com/ai-image-expander Publisher: Kenerate AI (https://kenerateai.com) Last updated: 6 October 2026 ## Key facts - Models: 5 — Nano Banana 2 Fast is the default - Largest output: Nano Banana 2 Fast, about 2736 × 1536 px at 16:9 - GPT models: 1536 px on the long side, 1024 px square - Nano Banana 2: About 1 MP (around 1360 × 768 at 16:9) - New shape: 10 ratios from 1:1 to 21:9, or grow each edge 0–100% - Per run: 1 or 2 variations, no watermark ## Steps 1. Add the photo — Upload a JPG, PNG or WebP up to 25 MB, or paste a public image link. Running it needs an account with a verified email. 2. Open the model picker — Expand Image opens on Nano Banana 2 Fast. Switch to Nano Banana 2 for people and products, or GPT Image 2 for text near the edge. 3. Set the new frame — Choose one of 10 ratios and place the photo (left, centre, right or top, centre, bottom), or grow each edge by 0–100%. Optionally describe the new area in up to 400 characters. 4. Expand, compare, download — Get 1 or 2 variations with the original outlined. If one model leaves a seam, run the same frame on another model and keep the better result. ## In depth ### Why does the model matter when you expand an image? Every expand is the same job: Expand Image places your photo on a bigger canvas, marks the empty area, and asks the model to continue the scene with the same perspective, horizon, light, colour and grain while keeping the original photo's content, position and scale unchanged. What changes between models is how they handle the hard parts — a face cut by the edge, a product label, a row of letters, a dense crowd — and how many pixels they hand back. That is why the same frame can look seamless on one model and slightly off on another. Trying a second model on a difficult picture is usually faster than rewriting the description. ### How big is the expanded image? The model answers at its own size, at the nearest ratio it supports. Nano Banana 2 Fast works around 2048 px on a square side, which comes to about 4 MP — roughly 2736 × 1536 for a 16:9 frame. Nano Banana 2 works around 1 MP, about 1360 × 768 at 16:9. The three GPT models return 1024 × 1024 for a square and 1536 px on the long side otherwise. So if your source photo is larger than the model's output, the expanded picture can have fewer pixels than the original. Send it to Upscale from the result screen when you need a print or a 4K screen. - Biggest file: Nano Banana 2 Fast - Most faithful people and products: Nano Banana 2 - Best with text: GPT Image 2 ### Expander, extender, uncrop — which do you need? They all describe outpainting. People searching 'AI image expander' or 'photo expander' usually want the picture bigger in one direction; 'uncrop' implies undoing a tight crop; 'extender' is the same tool by another name. On Kenerate it is one tool, Expand Image, and the same five models also sit behind Crop & Expand in Edit Studio. ### Fixing a weak seam Most problems show up where real and painted pixels meet. Turn on the outline of the original to see exactly where that is, then try one of these: - Run 2 variations and keep the cleaner one - Switch model: Nano Banana 2 for a face or product, GPT Image 2 for letters - Describe the new area, such as 'continue the wooden table and the white wall' - Grow less at once: expand to 4:3 first, then expand that result to 16:9 - Send the result to Edit to repaint a small detail ## FAQ Q: What is the best AI image expander model? A: It depends on the photo. On Kenerate's Expand Image, Nano Banana 2 is the pick for people and products because the tool describes it as keeping faces and products consistent. Nano Banana 2 Fast, the default, suits scenery and returns the largest file at about 4 MP. GPT Image 2 handles lettering and layouts near the edge best. Q: Is there a free AI image expander? A: You can try Expand Image without a subscription: new accounts get starter credits, every one of the five models is open to every account, and a failed run is refunded automatically. You need an account with a verified email to run an expand. Results download without a watermark, whichever model you choose. Q: Can I expand a photo with people in it? A: Yes. The model is told to keep the original photo's content, position and scale unchanged and to paint only the empty area, and the result outlines where your original sits so you can check the person against it. The risk is a body part cut by the edge, such as a shoulder or hand, which the model has to complete. Use Nano Banana 2 for these, and run two variations to pick the more natural one. Q: Why is my expanded image smaller than my original photo? A: Because the model answers at its own size. The GPT models return 1536 px on the long side, Nano Banana 2 about 1 MP and Nano Banana 2 Fast about 4 MP. A large camera photo expanded on a GPT model can therefore come back with fewer pixels. Switch to Nano Banana 2 Fast, or send the result to Upscale. Q: How far can an AI photo expander go? A: Up to a 21:9 frame in Ratio mode, or up to 100% of the photo's own width or height on each side in Grow edges mode, in 5% steps. Growing every side by 100% makes a frame three times as wide and tall, so most of the picture is new. Big expansions work best on simple surroundings like sky, sea or plain walls. Q: Can I tell the expander what to paint? A: Yes, optionally. 'Describe the new area' takes up to 400 characters, for example 'more beach and a pier on the left'. It is moderation-checked like every text field. Leave it empty and the model continues whatever naturally lies beyond the original edges, which is usually the right choice for skies, walls and backdrops. Q: Can I compare two models on the same photo? A: Yes. Run the same photo and frame on one model, then switch the model and run again; each result stays in your history with the original outlined. This is the quickest way to decide which expander suits a tricky picture, such as a product label or a hand at the edge, before you expand a whole set. ## Related pages - AI Image Extender: https://kenerateai.com/ai-image-extender - Photo Extender: https://kenerateai.com/photo-extender - Uncrop Image: https://kenerateai.com/uncrop-image - Photoshop Generative Expand alternative: https://kenerateai.com/photoshop-generative-expand-alternative - AI Image Upscaler: https://kenerateai.com/ai-image-upscaler ## Sources - Kenerate Expand Image: https://kenerateai.com/app/tool/expand-image - Kenerate Edit Studio (Crop & Expand): https://kenerateai.com/app/edit