How this works in your browser
Every image is first scaled to a common measurement on the shared axis, a matching height when combining side by side or a matching width when stacking, with the other dimension following proportionally so nothing is stretched. The tool then measures the total span and the largest cross-axis size, creates a canvas of exactly those dimensions, fills it white, and draws each scaled image in sequence at a running offset. The white fill is what you see wherever an image with different proportions leaves a gap. Because normalising the sizes is what makes a mismatched set align at all, the trade is that a very high-resolution source is scaled down, which is why the result is best treated as a screen-ready composite rather than a replacement for your originals.
Combine Images vs. traditional online converters
| Feature | Combine Images (in-browser) | Traditional online converters |
|---|---|---|
| File upload required | No - never leaves your device | Yes - file is sent to a server |
| Processing queue | None - starts instantly | Often, especially at peak times |
| Watermark on output | Never | Common on free plans |
| Usage limits | None - free, unlimited use | Often capped per day or file size |
| Works offline once loaded | Yes, for most tools | No - requires a live connection |
| Account required | No | Often, for anything beyond a trial |
Who uses Combine Images
Before and after comparisons
Put two versions of the same subject side by side so the difference reads at a glance.
Screenshot sequences
Join consecutive captures into one image so a process can be shared in a single file.
Product angle strips
Combine several views of an item into one image for a listing or message.
Quick side-by-side references
Merge two options into one file when sending a choice to someone for feedback.
How to use Combine Images
- 1
Open the Combine Images tool
Go to tools.slaytic.com and open the Combine Images tool. No sign-up or account required.
- 2
Add your images in order
Drop two or more files. They are placed in the order you add them.
- 3
Choose side by side or stacked
Pick the direction that suits your images and the point you are making.
- 4
Download the combined PNG
Save the single joined image, ready to share or paste into a document.
Frequently asked questions
Can I choose horizontal or vertical layout?
Yes, pick whichever direction fits your images.
Do the images need to be the same size?
No. Combining side by side scales every image to a common height, and stacking scales them to a common width, so the join lines up regardless of what you started with.
How is this different from the Collage Maker?
Combine Images is a simple single-row or single-column join. Collage Maker supports full grid layouts for more photos.
Why is the output smaller than my original photos?
Because the images are normalised to a common size before joining, around 500 pixels on the shared axis. That is what makes a mismatched set line up, but it does mean the result is sized for screen use rather than for printing or further editing. Keep your originals.
Why is there white space around some images?
Because their proportions differ. Once everything is scaled to a shared height, an unusually tall or narrow image leaves gaps on the cross axis, and those show as white. Using images with similar proportions avoids it entirely.
Can I control the order they appear in?
They are placed in the order you add them, left to right when combining side by side and top to bottom when stacking. For a before and after comparison, add the before image first.
What format is the output?
PNG, which keeps the joined result crisp and avoids adding compression artifacts to screenshots and graphics.