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Top 5 Best AI Image Extenders (2025)
Last Updated:
Sep 23, 2025

Top 5 Best AI Image Extenders (2025)

Have you taken the perfect selfie but realized you've accidentally cropped out parts of your friend's face, or completely forgotten to include a landmark in the background?

That photo is not lost — you can use one of these best AI Image extenders to recreate the parts that are out of the frame.

In this article, we're going to look at 5 online image extender options you can use in 2025 to fix ruined shots or change aspect ratios of your images in a couple of clicks.

What are AI Image Extenders?

AI image extenders are online tools that use generative artificial intelligence (AI) to expand images, adding content that lies beyond the frame of your photo.

Crucially, image extenders can add new content to an image without sacrificing or binning pixels.

These tools can help you to, for example, regenerate parts of an image that were cropped out.

In addition to that, AI image extenders can:

  • Change aspect ratios
  • Fix awkward framing
  • Create more space for text
  • Restore damaged or incomplete vintage photographs
  • Generate backgrounds

If you're looking for an ai image extender with best features, here are our top picks:

Our Top 5 Best Image Extenders at a Glance

Here's a quick overview of the most capable AI image extenders available today:

Tool Name Platform Best For
Overchat AI Image Extender Web, iOS, Android Easiest online image extension with a free trial
Canva Web, iOS, Android Quick design integration with multiple format presets
Fotor Web, iOS, Android Portrait expansion and print materials
Freepik Web, iOS, Android Full creative workflow with prompt control
Stable Diffusion Local installation Advanced users wanting complete customization

1. Overchat AI Image Extender

Overchat AI Image Extender consistently delivers great results for different types of images, from people to landscapes.

Overchat AI is the best image extender

The tool is very easy to use, because it works like a chatbot.

  1. You upload an image
  2. Set the aspect ratio
  3. Describe how you want to change the framing

You also describe the direction in which the extension should work. It's as easy as using ChatGPT.

Overchat AI also has high export resolution, which means the result stays clear.

  • Upload images up to 15 MB.
  • Supported aspect ratios: 1:1, 16:9, or 9:16

Under the hood, it is powered by an advanced Gemini 2.5 Flash Image model, also known as Nano Banana, leading to very accurate generations. Consider this before and after:

Overchat AI image extender before and after

Pay attention to his hand, feet, cloth texture, and ground details — the are very natural and match the scene perfectly. This is the result of using an advanced AI model.

Besides the extender, Overchat AI has other editing tools: you can change skies, repose characters, or edit images by removing and adding objects, as well as turn images into videos.

Want to learn more about image-to-video workflows? Read about the best AI video generators.

Pros:

✅ Seamless automatic expansion without manual prompting

✅ Maintains quality at high resolutions (4K+ support)

✅ Preset ratios for all major social platforms

✅ Batch processing for multiple images

✅ No watermarks on free tier

Available platforms: Web browser, iOS app, Android app

2. Canva

Canva's Magic Expand feature integrates directly into their design ecosystem, making it perfect for creators already using the platform.

The tool generates multiple expansion options per image, letting you choose the result that best fits your vision.

You can also add text, graphics, or other design elements to your image without switching apps.

Canva Magic Extend

However, Magic Expand is locked behind Canva Pro ($15/month or $120/year), though you get a 30-day free trial to test it out.

Pros:

✅ Multiple variations per expansion request

✅ Seamless integration with design tools

✅ Preset templates for social media dimensions

✅ Works well with product photography

✅ No need to download separate software

Cons:

❌ Only available with paid subscription

❌ Output limited to 2K resolution

❌ Can struggle with complex patterns

❌ Occasional artifacts at expansion boundaries

Available platforms: Web browser, iOS app, Android app

3. Fotor

Fotor is another AI image expansion tool.

We liked that it features a dual-result feature — it generates two variations per expansion request, giving you options.

Fotor AI image extender shows ads on a free version

On the downside, there were a lot of things we didn’t enjoy about using Fotor: we found ads on the free version distracting, the only way to download an image is by activating a free trial, and it messed up the feet in our generation.

Fotor image extender bad generation example

The ground texture is not bad in the image above, but the generations of his  hand and his feet are unusable

On the bright side, it seems to work well with skin tones, and there are a lot of controls.

Pros:

✅ Lots of controls

✅ Two variations per generation

✅ Additional photo editing tools included

Cons:

❌ Can’t download results without activating trial

❌ Overcomplicated UI

❌ Ads

❌ Generation quality is lower than some competitors

❌ Maximum file size limited to 4MB

Available platforms: Web browser, iOS app, Android app

4. Freepik

Freepik is an AI image extender that lets you control the canvas size and add details by using the chatbot interface.

Freepik AI image extender interface

Unfortunately, you can't drag the corners of the canvas. Instead, you control it by manually typing in dimensions in pixels, which is not as easy to do.

Also, we didn't like how the tool changed the ground texture and added a dark effect without us asking it to. In another generation, it added a window frame — the results can be unpredictable.

Freepik AI image extender before and after

Consider the ground texture — it doesn't match the rest of the landscape. That being said, the AI smartly hid potential problem areas like his hand and feet by using shadow and posing.

The good news is that after you expand the image, you can easily remove the background, replace objects, or make other AI edits without having to re-export and re-import files.

Pros:

✅ Precise control through text prompts

✅ Full suite of AI tools in one platform

✅ No switching between apps for edits

✅ Can download results with a free account

Cons:

❌ Not intuitive

❌ Expensive: premium starts at $12/month

❌ Generation quality is not as high as some competitors

Available platforms: Web browser, iOS app, Android app

5. AI Image Extenders in Stable Diffusion

Stable Diffusion is an open-source AI image generator that runs locally on your computer, giving you unlimited free access to AI image generation and AI image editing.

The software includes built-in outpainting features, but you'll need to set up specific extensions to use them.

Popular Stable Diffusion extension options for image expansion:

  • Mosaic Outpaint
  • InvokeAI
  • IOPaint
  • Automatic1111 WebUI
  • ComfyUI

Note: setting this up isn't simple. You need a decent graphics card (8GB VRAM minimum), familiarity with command-line tools, and patience to download models and configure settings.



Learn about how different AI models work.

Pros:

✅ Completely free and open source

✅ No usage limits

✅ Runs offline

✅ Active community creating new models daily

Cons:

❌ Requires powerful hardware

❌ Complex installation process

❌ No technical support

❌ Steep learning curve

❌ Some models trained on unlicensed content

Available platforms: Windows, Mac, Linux (local installation via GitHub)

FAQ

How to expand images with AI

Upload your image to any AI extender tool, then either drag the canvas borders to your desired size, select a preset aspect ratio, or tell the AI chatbot how to expand the image. Most tools process the expansion in 10-30 seconds

What is the best AI image extender?

Overchat AI Image Extender is the best overall, thanks to very high generation quality, and is the easiest to use. Canva Magic Expand works best if you're already using their design platform, while Freepik offers lots of control through text prompts. Stable Diffusion is a tool that can create custom images, but it requires technical expertise and a powerful computer to use.

What is the best free AI Image extender?

Overchat AI has the best free tier, with no watermarks, advanced AI model, and good resolution limits. Stable Diffusion, with extensions like IOPaint or Mosaic Outpaint, provides unlimited free expansions if you can handle the technical setup.

How does an AI Image extender work?

The AI looks at your original image to understand what it is showing—things like lighting, direction, textures, and how objects are arranged. It then uses diffusion models or GANs (Generative Adversarial Networks) to predict and generate what would logically exist beyond the frame.

Where to access a Free AI Image Extender?

Overchat AI offers a free web platform at overchat.ai with basic features and no watermarks. Hugging Face offers several free options, such as Diffusers Image Outpaint, that you can use directly in your browser. You can use Stable Diffusion for free as much as you like. Just download it from GitHub and install the outpainting extensions on your computer. But keep in mind that you'll need a strong GPU and some technical skills to do this.

Bottom Line

Overchat AI is the easiest to use. It has an advanced AI model that handles complex images well and doesn't limit the resolution like most competitors do.

If you're using Canva for design work, their Magic Expand feature saves time by keeping everything in one platform. Freepik's text prompts give you control when you need specific elements added.

If you need to do a lot of work without paying monthly fees, set up Stable Diffusion on your own computer. It takes time to set up, but you can process an unlimited number of images for free.

Try it for free to see how well it works with your specific image types. Product photos are different from landscapes, and portraits are different from architectural shots. Choose the tool that works best for your content.