Mobile Apps and Web Solutions

Using JIMP to build an iOS icon resizer

Everytime I manually had to create some thumbnails for, or a whole set of icons for an iOS app, I thought “next time I’ll write a script to automate this”.

Finally I got around to writing the script, which only took a few minutes which should save me, er, a few minutes each year.

Once I found the excellent JIMP package - a pure JavaScript image manipulation library - it was easy to write a couple of scripts to do exactly what I wanted.

The script to generate all the image sizes required for an iOS app is available on GitHub if you want to try it out yourself.

N.B. This blog post has now moved to