How to extend or expand an image with AI (outpainting guide)

By the end of this guide you will have taken an image that is too tight, too square or too narrow and extended it so it fits a new shape, such as a wide banner, a tall story or a cover image, with AI-generated content filling the new space. The job is done by an AI image extender, also called outpainting or generative expand: the tool looks at your picture and draws a plausible continuation of the scene.

If you want to extend an image with AI, the decisions are how much new area you need, whether the extension must match a real scene closely, and how many images you have. This guide compares seven tools from our Image generation category.

Key takeaways

• Choose the new shape first, place your image on the larger canvas, run the expand step, and inspect the new edges and seams at full size.
• The main decision is the tool type: a generative fill feature in a creative suite, a dedicated expander, or an editor focused on product photos.
• Small extensions on simple backgrounds work best. Faces, text and complex patterns near the edge are where invented content goes wrong.
• Extended areas are invented, so do not use an expanded photo as a record of what was really there.

What you need before you start

• The source image. Use the largest, cleanest version you have, as a JPG or PNG.
• A target shape. Know the aspect ratio or size you need, such as a banner, story or cover.
• An account. Some tools, such as PicLumen, require one, and many meter usage in credits.
• Time. One image takes minutes. Perfecting the seams can take longer.
• Difficulty. Easy to moderate. The tools do the drawing, but you must judge the result.
• Honesty. An extended image shows things that were never photographed. Do not present it as documentary or news photography, and follow the disclosure rules of any platform or client.

Which kind of AI tool fits this job

Choose by where the rest of your work happens.

A creative suite with generative fill. Adobe Firefly lists generative fill, remove and expand for parts of a picture, with reference images and a choice of Adobe or partner models. Adobe says its content is designed to be commercially safe. Playground lists AI resize and extend on its Pro plan, alongside background removal and upscaling.

Mobile and web photo editors. Pixelcut lists Generative Fill and Expand Image, plus background removal, a magic eraser and upscaling, on iOS, Android and the web. PicLumen lists an image extender among editing tools such as a background remover, colorizer and upscaler, with apps for iOS and Android.

An expander with a per-output API. Kaze AI lists an image expander for outpainting and reframing to new aspect ratios, and offers an API priced per output.

Product-photo and portrait tools. ProductAI lists an Extend Canvas tool with preset aspect ratios for product images. Photo AI lists a zoom out feature that uncrops and extends a picture, as part of a service built around training a model on your selfies.

Step 1: Decide the new shape

The target format tells you how much to invent.

1. List where the image will appear: a website banner, a story, a printed cover.
2. Note the aspect ratio you need. ProductAI's Extend Canvas offers preset aspect ratios, so check whether your tool supports a custom size.
3. Work out which sides need more room and by how much.
4. Keep the extension as small as the layout allows, since less invented area means fewer errors.

Check it worked by sketching the new frame around your image and marking the areas to be filled.

Step 2: Choose a tool and check the plan

You finish this step with a tool ready and a plan that covers it.

1. Match the tool to your workflow: a suite if you already use it, a mobile editor for quick social edits, an API for many images.
2. Check the usage limits. Pixelcut free users typically get about 3 uses per day, PicLumen's free Basic plan gives 10 Lumens per day, and Playground's Free plan has a small monthly allowance for premium models.
3. Check commercial rights. PicLumen's free Basic plan has no commercial use rights.
4. Use the comparison table further down to see pricing and stated limits side by side.

Check it worked by confirming your plan allows commercial use if you need it.

Step 3: Prepare the image and canvas

Give the AI a clean starting point.

1. Open the image in the tool and choose the expand or extend option.
2. Set the new canvas size or aspect ratio. Playground lists AI resize and extend up to 2048x2048 on Pro, so check size limits before you plan a big expansion.
3. Position the original so the extension falls where you need it.
4. Crop out any distracting corner of the original that would be hard to continue.

Check it worked by seeing the original centered or placed on a larger canvas with empty areas around it.

Step 4: Describe what should appear in the new area

A short instruction guides the fill when the tool allows it.

1. If there is a prompt box, describe the scene continuing past the edge: "more of the grassy field and cloudy sky".
2. Keep the description consistent with the original lighting and style.
3. If the tool has reference images, use one that matches the look. Adobe Firefly lists reference images and style settings.
4. If there is no prompt option, let the tool fill automatically and choose among its variations.

Check it worked by reading your instruction and confirming it matches what already exists in the picture.

Step 5: Generate and compare variations

Treat the first fill as one option among several.

1. Run the expand step and view all the variations returned.
2. Compare the seam where old meets new. Look for changes in light, colour, grain or perspective.
3. Look for duplicated objects, warped lines, strange shapes and cut-off subjects.
4. Re-run with a changed prompt if the first options look wrong. ProductAI notes that its Edit tool may take a few attempts and prompt adjustments to land the result.

Check it worked by choosing a version where you cannot see where the original ends.

Step 6: Fix seams and details

Small edits turn a good fill into a clean one.

1. Zoom to 100% along the join and the new edges.
2. Use object removal or generative fill to repaint trouble spots. Adobe Firefly, Pixelcut and Photo AI each list tools for filling or removing parts of an image.
3. Match brightness and colour with a basic adjustment if the new area is slightly different.
4. If a person's face or a logo was extended, check it against the real thing, or crop the extension out.

Check it worked by viewing the image at the final display size, where the seams should disappear.

Step 7: Export in the right size

Save a file that fits the destination.

1. Export at the size and format the destination needs, such as PNG or JPG.
2. Check the resolution of the extended image. If it is too small, use an upscaler. Pixelcut and PicLumen both list upscaling.
3. Keep the original image and the extended version together.
4. Label the image as AI-extended if the platform or client expects it.

Check it worked by placing the file in the real layout and confirming the extended areas look natural.

Tools for this job compared

Tool	Good fit for	Pricing	Stated limits
Adobe Firefly	Generative fill, remove and expand on web and API	Freemium, paid from $9.99/mo (checked 23 Oct 2026)	Generative credits are metered; premium features use more credits; several tools in beta
Pixelcut	Mobile and web expand and generative fill	Freemium, paid from $8/mo (checked 24 Oct 2026)	Free users typically about 3 uses per day; generative tools have soft daily limits; API has no SLA
Kaze AI	Outpainting and reframing, with a per-output API	Freemium	Web subscription prices not shown in the plan text; API balance is separate from web credits
Photo AI	Zoom out and uncrop inside a selfie-model service	Paid, from $19/mo (checked 24 Oct 2026)	Each action costs credits; monthly subscription credits expire every month
PicLumen	Image extender with iOS and Android apps	Freemium, paid from $7.59/mo (checked 24 Oct 2026)	Free Basic plan gives 10 Lumens per day with no commercial use rights; no developer API
ProductAI	Extending product images to preset aspect ratios	Paid, from €13.28/mo (checked 24 Oct 2026)	Extend Canvas does not support custom dimensions; output limited by monthly credits
Playground	Resizing and extending graphics on a canvas	Freemium, paid from $12/mo (checked 24 Oct 2026)	Free plan has a small monthly allowance for premium models; free generation slows at peak hours

Prices and plan limits change, so confirm the current terms on each vendor's site before you subscribe.

Common mistakes to avoid

• Asking for too much new area. The more the tool has to invent, the more likely it is to repeat patterns or drift in style. Fix it by extending in smaller steps, or by choosing a source photo that already has room around the subject.
• Ignoring the seam. A visible line where old meets new gives the edit away. Fix it by zooming in at 100% and repainting or blending the join.
• Extending through a face or text. Cut-off faces and lettering rarely complete correctly. Fix it by cropping tighter, choosing a different source, or editing those parts by hand.
• Assuming the free plan covers business use. Some free tiers exclude commercial rights, as PicLumen's does. Fix it by checking the plan terms before you publish.
• Treating the result as a real photograph. The extension shows things that never existed. Fix it by not using extended images as evidence or news imagery, and by disclosing AI edits where required.

How we put this together

This is an evidence-based guide built from each tool's listing in our directory, which is compiled from the vendor's own site and pricing page. It is not a review based on using the tools. We don't rank tools, and nobody paid to be included. Some outbound links may be affiliate links; see our disclosure.

Frequently asked questions

Is there a free way to extend an image with AI?

Partly. Pixelcut has a Free plan with typically about 3 uses per day, PicLumen has a free Basic plan with 10 Lumens per day, and Playground has a Free plan with a small allowance for premium models. Free plans may limit commercial use, resolution or speed, so check before publishing.

What is the difference between outpainting and generative fill?

Outpainting extends an image beyond its original edges. Generative fill is a broader term that can also fill or replace areas inside a picture. Tools such as Adobe Firefly list both fill and expand, and several others list an expander or extender.

Which tool is good for extending images on a phone?

Pixelcut works on iOS, Android and the web, and PicLumen has iOS and Android apps. Photo AI and Kaze AI are listed for the web, and Kaze AI describes itself as a toolkit for browser and mobile. Check each vendor's site for current app options.

Can I extend an image to a banner size?

Yes, if the tool supports the aspect ratio you need. ProductAI offers preset aspect ratios only, while Playground lists AI resize and extend up to 2048x2048 on Pro. Plan your layout around the sizes available, or extend in more than one step.

Can I use an extended image commercially?

It depends on the tool and plan. Adobe says Firefly content is designed to be commercially safe, while PicLumen's free plan has no commercial use rights. Read the licence for your plan, and make sure you hold the rights to the original photo as well.

Compare more options in our Image generation category. If you only need the subject, see how to remove an image background with AI.