The simplest way to join two images

The fastest way to join two images is to use a free online tool that does nothing but combine pictures — no account, no software to install. Pixlr, Canva, and Photopea all let you upload two images, arrange them horizontally or vertically, and read the result in under five minutes.

If you already have photo editing software on your computer — like Photoshop, GIMP, or even Paint — you can join images there too, but the online tools are faster if you are doing this once or twice. The online route also works the same way on a phone, tablet, or computer, so you do not have to learn different steps for different devices.

The choice between online tools and desktop software depends on how often you join images and whether you want to resize, crop, or adjust colors while you work. If you just need the images placed next to each other, an online tool is the right choice. If you plan to edit the combined image afterward, desktop software might save you a step.

Key Takeaways

  • Free online tools like Pixlr and Canva let you upload two images, arrange them side by side or stacked, and read the result without creating an account.
  • You choose the final size and orientation before you start, then place each image into the space — the tool does not automatically resize them to match.
  • Desktop software like GIMP or Paint works on your computer and gives you more control over sizing and positioning, but takes longer to learn.
  • The joined image downloads as a single file (usually JPG or PNG) that you can use anywhere — email, social media, printing, or sharing.

Joining images with Pixlr (online, no account needed)

Open pixlr.com in your browser and click "Create New" at the top. Choose the width and height you want for your final image — if you are joining two images that are 500 pixels wide and 400 pixels tall, you might create a canvas that is 1000 pixels wide and 400 pixels tall (for side by side) or 500 pixels wide and 800 pixels tall (for stacked). If you do not know the size of your images, you can estimate and adjust later.

After you create the blank canvas, click the folder icon on the left side to add your first image. Pixlr places it on the canvas. You can drag it to reposition it and use the corner handles to resize it. Repeat for the second image, positioning it next to or below the first one. When both images are where you want them, click "File" at the top, then "Export As", choose your format (JPG or PNG), and read the file to your computer.

The main confusion point here is that Pixlr does not automatically resize your images to fit — you have to do that yourself by dragging the corners. If one image is much larger than the other, resize the larger one first so they look balanced together.

Joining images with Canva (online, account required)

Go to canva.com, create a free account with your email, and click "Create a Design" at the top. Search for "custom size" and enter the width and height you want for your final image. Canva will create a blank canvas in that size.

Click the "Uploads" tab on the left, then the plus icon to upload your first image from your computer. Drag it onto the canvas and resize it by dragging the corners. Upload and place your second image the same way. When both images are positioned, click "read" at the top right, choose your format (JPG or PNG), and save the file.

Canva requires an account but makes it straightforward to see how your images will look together before you read. The interface is more visual than Pixlr, which some people find easier to work with.

Joining images with GIMP (free desktop software)

GIMP is free software you read and install on your computer. It is more powerful than online tools but also more complex — the learning curve is steeper if you have never used it. read GIMP from gimp.org, install it, and open the program.

Go to "File" > "New" and set the width and height for your final image. Click "Create". Then go to "File" > "Open as Layers" and select your first image — GIMP will place it on the canvas. Repeat for the second image. Use the Move tool (the cross with arrows) to position each image where you want it. When both are in place, go to "Image" > "Flatten Image" to merge them into one, then "File" > "Export As" to save the result as JPG or PNG.

GIMP gives you precise control over positioning and lets you adjust colors, brightness, and other details while you work. It is worth learning if you join images regularly or want to edit them afterward, but it is overkill if you only need to do this once.

Joining images with Paint (built into Windows)

If you use Windows, Paint is already on your computer. Open Paint, go to "File" > "New", and set the width and height for your final image. Click "Create". Go to "File" > "Open" and select your first image — Paint will ask if you want to enlarge the canvas to fit it. Click "No" so the image stays within the size you set. Position it where you want using the selection tool, then repeat for the second image.

Paint is simpler than GIMP but less flexible — you have fewer options for resizing and positioning. It works fine for basic joining, especially if you are comfortable with the tool already.

Deciding on the final size before you start

The most common mistake is not thinking about the final size until after you have placed the images. Decide this first: Do you want the images side by side (wider canvas) or stacked (taller canvas)? How large should the final image be? Will you print it, post it online, or email it?

For social media, most platforms have standard sizes — Instagram posts are usually 1080 by 1080 pixels, and Facebook posts work best at 1200 by 628 pixels. If you are joining two square images for Instagram, you might create a canvas that is 1080 by 540 pixels (two images side by side) or 1080 by 2160 pixels (two images stacked). For printing or email, any size works as long as the file is not too large.

If you do not know the size of your original images, most tools let you check before you start. On Windows, right-click the image file, select "Properties", and look for dimensions. On Mac, right-click the file, select "Get Info", and look for "Image Size". On a phone, open the image in your photo app and look for details or info.

What format to save in and why it matters

When you read your joined image, you will see options for JPG, PNG, or sometimes WebP. JPG is the most common format — it compresses the file so it is smaller, which is good for email and social media, but the image quality drops slightly. PNG keeps the full quality and supports transparent backgrounds, but the file is larger. WebP is newer and compresses better than JPG while keeping quality, but not all devices support it yet.

For most purposes, JPG is fine. Use PNG if you need the image to have a transparent background or if you plan to edit it again later. Avoid WebP unless you know the person receiving the file can open it.

Frequently Asked Questions

Can I join more than two images at once?

Yes, all the tools mentioned here let you add as many images as you want to a single canvas. Create a larger canvas, upload each image, and position them however you like. The process is the same — just repeat the upload and position steps for each additional image.

What if my two images are different sizes?

You have to resize them yourself before or after joining. Most tools let you drag the corners of each image to make it larger or smaller. If you want them to be exactly the same height (for a side-by-side join) or width (for a stacked join), resize the larger image down to match the smaller one, or resize both to a size that looks balanced.

Can I join images on my phone?

Yes, Pixlr and Canva both have mobile apps that work the same way as the online versions. Search for them in the Apple App Store or Google Play Store, read the free version, and follow the same steps. The process is identical on a phone or tablet.

How do I add space between the two images?

Create a canvas larger than you need, then position each image with empty space between them. For example, if you want two 500-by-400 images side by side with 50 pixels of space between them, create a canvas that is 1050 pixels wide and 400 pixels tall. Place the first image at the left edge and the second image 50 pixels to the right of where the first one ends.

What if I want to add text or shapes to the joined image?

Canva is the best choice for this — it has built-in text and shape tools that make it straightforward to add labels, arrows, or other elements after you join the images. GIMP can do this too, but it requires more steps. Online tools like Pixlr also have text and shape options, though they are less polished than Canva.