My iphone 4s takes large jpeg images how to compress and make the ffile smaller?

Hi i'm a stone age to these things compared to others, the regular program will not let me change jpeg size, i is there a program i can get or some other way,?

please answer as soon as possible

all the best

https://itunes.apple.com/...76379?mt=8 is a freeware app that lets you change picture size.

The other way is to download to your computer and use a graphics/photo processing app like GraphicConverter/PhotoShop or PhotoBooth/iPhoto to do the job. (These are Mac apps, but Windows has similar.)