Your files never leave your device. All processing happens in your browser.
To merge images, add two or more photos to the Img Stop Merge Images tool, choose Side by side or Top to bottom, and set a gap and background color. Click Merge images and download one JPG, PNG or WebP file. The joining happens inside your browser.
About the Merge Images
The Img Stop Merge Images tool joins several pictures into a single image, either in one row or in one column. It works with JPG, PNG and WebP files. By default it makes all photos the same height for a row, or the same width for a column, so the edges line up neatly without stretching any picture out of shape.
Merging is useful when an app or form allows only one image, or when you want to compare pictures next to each other. Long chats and web pages can also be stitched from several screenshots into one tall image. You choose the gap between images, the background color behind them and the output format, then download the finished picture straight away.
Key features
- Two directionsPlace images side by side in a row or stack them from top to bottom.
- Equal size optionMake all images the same height or width so the edges line up.
- Adjustable gapAdd up to 100 px of space between images, or none at all.
- Background colorChoose the color that fills the gap and any space around smaller images.
- Three formatsSave the merged picture as JPG, PNG or WebP.
- Live previewSee the merged result update before you download it.
How to use the Merge Images
- Add the images Drop two or more images on the box, choose them from your device, or paste with Ctrl+V.
- Pick a direction Choose Side by side or Top to bottom, and keep Make all the same height / width ticked for neat edges.
- Set gap and color Move the Gap slider, pick a Background color and select the Output format.
- Merge and save Click Merge images, then press Download to save the single combined file.
Merge Images at a glance
| Price | Free |
|---|---|
| Input formats | JPG, PNG, WebP |
| Output formats | JPG, PNG, WebP |
| Layouts | Side by side or top to bottom |
| Gap | 0 to 100 px |
| Processing | In your browser – files are not uploaded |
When to use it
- Put two product photos next to each other to compare them.
- Stitch several chat or web screenshots into one tall image.
- Join the front and back of an ID card or document into one file for an online form.
- Show a before and after edit side by side.
- Combine a logo and a photo into one banner picture.
Tips for the best result
- Images are joined in the order you add them, so add the left or top image first.
- Choose Top to bottom for screenshots of long chats, and Side by side for comparisons.
- Pick PNG for screenshots with text to keep the letters sharp, and JPG for photos to get a smaller file.
- Untick the same size option if you want each image to keep its original size.
Frequently asked questions
How do I put two pictures side by side?
Add both pictures to the Merge Images tool and choose Side by side. Keep Make all the same height / width ticked so both images get the same height. Click Merge images and download the result. The first image you added appears on the left.
Can I merge images vertically, one under the other?
Yes. Choose Top to bottom as the direction. The images are stacked in the order you added them and, with the same size option on, they all get the same width. This is the best way to join long screenshots into one picture.
Will merging reduce the quality of my photos?
With the same size option, bigger photos are scaled down to match the smallest one, so very different sizes can lose some detail. For best quality, merge photos of similar size, or untick the option. PNG output keeps every pixel without compression loss.
Is there a limit to how big the merged image can be?
The merged image keeps the original pixel sizes where possible. If the final picture would be longer than 16,000 pixels on one side, it is scaled down to fit, because browsers cannot safely create larger images.
What is the difference between Merge Images and Collage Maker?
Merge Images puts pictures in one single row or one column and keeps their own shapes. Collage Maker arranges 2 to 12 photos in a grid of equal cells and crops each photo to fit. Use Merge for comparisons and long screenshots, and Collage for photo grids.
Last updated October 29, 2026 by the Img Stop team.