How this works
Images are placed edge to edge in the order you arrange them — side by side or stacked — into one combined image, each keeping its own resolution rather than being resized to match the others unless you choose to align them.
Common questions
Do the images need to be the same size?
No, but mismatched sizes mean the shorter or narrower ones may leave a gap or the combined image will have an irregular edge along that side — for a clean result, images closer in size along the joining edge look best.
Can I join more than two images at once?
Yes — add as many as you like and arrange the order; they all combine into one image in a single pass.