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Combine Images Vertically
Stack screenshots and photos into one tall image. Most people arriving here have a set of phone screenshots and want them to look like a single continuous capture.
- Local processing
- JPG, PNG & WebP
- Works on phone
The giveaway is the repeated bar
Stacking screenshots is easy. Making the stack look like one continuous screen is the part that takes thirty seconds of preparation, and skipping it is what makes a long screenshot look obviously assembled.
Every phone screenshot carries the same furniture: a status bar with the clock and battery at the top, often a navigation or tab bar at the bottom. Stack three captures and the clock appears three times down the image, which immediately tells the viewer these are separate shots — and worse, it breaks the illusion exactly where you wanted continuity.
Crop that furniture out of every capture except the first before adding them. Keep the top bar on image one for context, then trim it from the rest. The same goes for any sticky header that stayed fixed while you scrolled.
Overlap is the other half of the problem. Scroll-and-capture usually repeats a few lines of content between shots. This tool stacks what you give it — it does not detect or remove duplicated rows, and there is no reliable way to do that automatically for arbitrary interfaces. Trim the repeated lines from the top of each following capture and the joins become invisible.
With the furniture and overlap removed, set spacing to zero. That is what makes the result read as one document rather than a strip of panels.
Matching widths
Equal width is the default and is almost always what you want for screenshots. Every image is scaled proportionally to a common width, so the column has straight edges and no image is cropped. Captures from the same device already share a width, so nothing is rescaled at all.
Original width keeps each image at its own size and lets you align them left, centre or right. This is only useful when mixing sources of genuinely different widths — a desktop screenshot alongside phone captures, say — and you would rather see the size difference than normalise it away.
Mixing a very wide desktop capture with narrow phone screenshots under Equal width makes the phone screenshots enormous and the desktop one unreadable. Crop the wide one down to the region that matters instead.
How tall is too tall
Vertical output grows fast, and people underestimate it. Six phone screenshots at a 1200-pixel output width land around 15 000 pixels tall — far beyond anything that displays at a readable size in one piece.
Two things follow. First, the maximum-width setting controls height too: narrower output means proportionally shorter, so it is the lever to reach for when a file gets unwieldy. Second, messaging apps and social platforms re-compress very tall images aggressively, and some refuse them outright — which is when carefully preserved screenshot text turns to mush.
Past roughly eight to ten screenshots, splitting into two images usually serves the reader better than one enormous file.