Merge JPGs vertically or horizontally
Stitch multiple JPGs together in your preferred order—either vertically (top-to-bottom) or horizontally (left-to-right). Perfect for combining photos, screenshots, or receipts into a single JPG. We run the entire process in your browser without uploading your files.
Choose JPG files
Drag and drop multiple files at once
How to use
- 1
Drag and drop the JPG files you want to combine, or click to select. Upload them in the sequence you want them joined.
- 2
Choose the merge direction (vertical or horizontal) to set how they align.
- 3
If files have different dimensions, adjust alignment settings. Align vertical images by width (scale to narrowest or widest) and horizontal ones by height (scale to shortest or tallest). You can also set a custom background color for borders.
- 4
Click "Merge images" to generate your combined JPG, and download it immediately.
FAQ
- How do you determine the order of the merged images?
- We join JPGs in the exact sequence you upload them. To change the order, remove the files and add them back in your desired sequence.
- What happens if my images have different sizes?
- We align vertical images by width and horizontal ones by height. If you select "Scale to narrowest/shortest," we scale larger images down. If you select "Scale to widest/tallest," we pad smaller images with your chosen background color.
- Where does the background color appear?
- The background color fills the border padding when fitting smaller images to match the largest file. If all your JPGs are the same size, we don't add any borders.
- Do you upload my JPGs to a server?
- No. We merge your images locally on your device. We never upload files to a server, and they clear from memory as soon as you close the page.
Merging Produces One Long Image, Not a Document
This stacks several JPGs vertically into a single image. The result is nothing like bundling them into a PDF. A PDF stays a paged document you flip through; a merge removes the boundaries entirely and gives you one continuous image that simply keeps going as you scroll.
That difference decides which tool you want. Merge when the vertical flow matters — chat captures, long-form product pages — or when you're posting somewhere that accepts a single image. Choose PDF when you'll print it or need to page through it.
Material That Suits Vertical Stacking
- Joining a conversation captured across several screenshots so the flow reads continuously
- Building a single tall image for a product detail page
- Posting several images somewhere that only accepts one attachment
- Filing multiple pieces of photo evidence as a single archived file
Most Failures Come Down to Height
Merging hits limits more often than other conversions, for a structural reason: stacking vertically keeps adding height, and there is a ceiling on how long one side of an image the browser can draw. This tool checks the following limits up front and tells you before starting rather than failing midway.
| Limit | Value | What it means |
|---|---|---|
| Files per merge | 30 | Beyond that, split into two passes |
| Longest side of the result | 16,384px | The first ceiling you hit when stacking vertically |
| Total pixels in the result | 100MP | Wide images can hit this even at modest heights |
Working through it makes the scale concrete. A phone screenshot is typically around 2,000px tall, so eight of them stack to 16,000px — essentially the 16,384px ceiling. Larger originals hit it with fewer images.
There are two ways around it: resize each image before merging to bring the height down, or split the set into two or three batches and merge each. If the result is for viewing on screen, you rarely need full original resolution anyway, which usually makes resizing the better option.
When the Images Aren't the Same Width
If the images differ in width, the narrower ones leave empty space beside them. That forces two decisions: where to place the narrow image (left, centre, or right alignment) and what colour fills the gap.
Centre alignment on a white background is a reasonable default, but if your source images have a different background colour, matching it looks far better. Merging dark-mode chat captures onto white leaves obvious white bands down the sides.
The cleanest fix is to remove the problem up front: resize everything to a common width before merging and no gaps appear at all.
One Thing About Saving as JPG
A JPG result stays light and opens anywhere. But if the sources are text-heavy screenshots, JPG compression leaves artefacts along letter edges. When the text or tables need to stay legible, switch the output format to PNG. Long vertical images tend to get zoomed into, which makes the difference more visible than usual.
Related guides
When to Stitch Images vs. Bundle Them into a PDF
Merging several pictures into one long image is handy in specific ways. Here are the best vertical and horizontal stitching use cases, plus how to choose between one image and a multi-page PDF.
How to Combine Images into One PDF (and What to Watch For)
Bundling scans, receipts, or pages into a single PDF locks the order and makes sharing easy. Here is how to handle page order, page size, and quality.