How to stack images vertically

Updated 15 June 2026

Stacking images vertically — joining them top to bottom into one tall picture — is handy whenever a single wide shot won't do. Think long screenshots of a chat or web page, recipe steps, a vertical photo story, or a stacked before-and-after. This guide covers how to do it cleanly so the seams line up and nothing gets stretched.

Step by step

1. Open StitchPic and load your images. Add more with the + Add image tile, and order them with the up/down arrows.
2. Set the direction to Vertically.
3. Under Resize images, choose how to match widths (see the next section).
4. Optionally add spacing and a background colour for a gap between images.
5. Press Merge!, then Download PNG.

Matching widths is what matters when stacking

When images are stacked, their widths need to agree or you'll get ragged edges with background colour filling the gaps. Your options:

• Magnify smallest — widens the narrower images to match the widest. Fills the frame edge-to-edge.
• Reduce biggest — narrows the widest image to match the narrowest. Keeps smaller images at native quality.
• Crop biggest — trims the wider images from the sides instead of scaling them.
• Do not adjust — keeps original widths; narrower images are centred with background colour on either side.

For screenshots taken on the same device, the widths usually already match, so Do not adjust works perfectly and keeps everything pixel-exact.

Great uses for vertical stacks

• Long screenshots — capture a conversation or article in sections, then stack them into one continuous image.
• Step-by-step visuals — recipes, tutorials, or workflows where order reads naturally top to bottom.
• Tall social posts — Pinterest and Instagram both favour tall images that take up more screen space.
• Comparison stacks — before above, after below.

Keeping a tall image sharp

Vertical stacks can get large. StitchPic exports a lossless PNG, so quality is preserved, but very tall images (tens of thousands of pixels) can be heavy. If you're stacking many screenshots, consider whether the platform you're posting to has a maximum dimension, and crop out redundant headers/footers from each piece before merging to keep the result tidy.

Common questions

Why is there empty space on the sides?

That happens when images have different widths and Do not adjust is selected — the narrower ones get centred. Switch to Magnify smallest or Reduce biggest to remove it.

Can I mix portrait and landscape images?

Yes, but matching widths will make the landscape ones short and the portrait ones tall. It still works; just preview the result before downloading.