Is there a program or site for cutting jpg images?

Question

Images

Given: there is a jpg picture, very large height 20,000 px >
It needs to be cut into small pieces to fill the site.
It will take a long time to do it manually.
Is it possible to automate the process somehow?

Answer 1

image magic to the rescue.
Or you can stir up macros / scripts in Photoshop

Answer 2

For example, using ImageMagick tools:
www.imagemagick.org/Usage/crop/#crop_tile
(keep in mind that the syntax for Linux is there, the features of working under Windows are described here, for example www.imagemagick.org/Usage/windows/#calculations )

Answer 3

How about doing this with the Nesting tool in Photoshop? In it, you can specify the number of rows and columns or the width and height of the sliced ​​​​pieces into which you want to divide the picture. And then just save it.