How to join images using ImageMagick

If you want to tile images on a 2D grid, then check out how to use the tile command.

If you just want to join images side-by-side or one below another into a single row or column, then there is an easier command called append.

To join images horizontally side-by-side into a row:

$ convert *.png +append out.png

To join images vertically one below another into a column:

$ convert *.png -append out.png

Tried with: ImageMagick 6.7.7.10 and Ubuntu 14.04