Merge JPG Files Into One
Combine your JPG photos into one seamless graphic. Great for creating vertical strips of screenshots or panoramic collages.
Last updated: August 2026
Drop your images here or click to select
Supports JPG, PNG, WebP and AVIF
Merging draws your images onto a single canvas at their own native pixel dimensions and exports the result once. Nothing is scaled on the way in, so a 4000-pixel photo contributes 4000 pixels to the merged file. That is what makes a merge different from a collage tool that fits everything into a fixed template — the output is as large as its inputs demand, and detail survives because no individual image is resampled.
The one setting that changes more than it appears to is the background colour, because it decides the output format. Choose transparent and the result is exported as PNG; choose white or black and it is exported as JPEG. That is worth knowing before you pick, because the choice is really about what kind of content you are merging. Photographs suit JPEG. Anything with text, screenshots or flat graphics is much better served by PNG — which means selecting the transparent background even when your images are fully opaque and no transparency will actually show.
Images of different sizes are handled by centring rather than stretching. Merge a wide photo with a narrow one vertically and the narrow one sits centred, with background colour filling the space either side. Nothing is distorted to force a match, which is the right default — but it does mean a set of wildly different sizes produces visible bands. Resizing to a common width first is what makes a mixed batch look deliberate.
How to merge JPG files into one image
- 1
Add your JPGs
Drop them all in at once. They appear as thumbnails in the order the merge will follow, and everything is processed in your browser rather than uploaded.
- 2
Drag them into order
Rearrange the thumbnails until the sequence is right. The merged image follows exactly the order you see, so this is worth doing before anything else.
- 3
Pick direction and spacing
Vertical stacks them into a strip; horizontal places them in a row. Add a gap if you want visible separation between images, or leave it at zero for a seamless join.
- 4
Choose the background, then merge
White or black produces a JPEG; transparent produces a PNG. Pick based on the content, not on whether you need transparency — text and screenshots want PNG either way.
Pro tip: Resize before you merge, not after. A merged image made from files of different widths carries bands of background colour down its edges, and cropping those away afterwards means cutting into the images themselves. Bringing everything to a common width first — Batch Image Resizer does a whole set in one pass — produces a clean rectangle with no filler at all. It also keeps the merged file smaller, since you are not storing empty background.
Troubleshooting: If text in the merged file looks fuzzy, the export was JPEG because a white or black background was selected — switch to transparent to get PNG output. If there are unexpected coloured bands, the source images have different dimensions and the background is filling the difference. If the merged file is very large, that is the native-resolution behaviour working as intended, and Compress Image reduces the bytes without re-merging. If the order is wrong, it follows the thumbnails rather than the filenames.
For a run of screenshots specifically, Stitch Screenshots Together Online covers the overlap problem that catches people out. For two-image comparisons, Combine Two Images Side by Side. If the destination is a document rather than an image, Convert JPG to PDF Online gives each image its own page instead of joining them. Once merged, Compress JPG to 500KB brings a large result down, or use the full Merge Images tool.
Frequently asked questions
How do I merge multiple JPG files into one image?
Drop them all into the tool above, drag the thumbnails into the order you want, choose vertical or horizontal, and merge. The images are drawn onto one canvas at their original pixel dimensions, so nothing is scaled down in the process.
What format is the merged image?
It depends on the background you choose. A transparent background produces a PNG so that transparency is preserved; white or black produces a JPEG. If your content is text or screenshots, choose transparent to get PNG output even though the images themselves are opaque — PNG keeps text edges crisp.
Does merging reduce image quality?
The images are drawn at their native resolution, so no detail is lost in the merge itself. The only quality question is the export format: JPEG is lossy and PNG is lossless, which is why the background choice matters more than it looks. Nothing is resampled or scaled during the merge.
Why do my merged images have coloured bars around them?
Because the source files are different sizes. Images are centred along the merge axis rather than stretched to match, so background colour fills the difference — which is preferable to distortion, but looks untidy. Resize everything to a common width or height first and the bars disappear.
Are my images uploaded when I merge them?
No. The merge is drawn on a canvas inside your browser and the finished file is saved directly from there. Nothing is transmitted to any server, and the tool works with your connection switched off.
Looking for the full-featured version? Open the main Merge Images tool.
Related Tools & Resources
Combine Two Images Side by Side – Fast & Free
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Stitch Screenshots Into One Image
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Merge Images – Full Tool
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Convert JPG to PDF Online – Fast & Free
Turn your JPG images into a single PDF document instantly. Your files are processed entirely in your browser for maximum privacy.
Compress JPG to 500KB – High Quality, Free
Compress large photos to 500KB while keeping near-original quality. Great for listings, portfolios, and email — private in-browser processing.