How to resize/compress pictures on your phone, tablet or computer

[meggie]

I have just carried out this process yesterday for an application for an Indian visa. The passport photograph size, unlike ours has to be equal dimensions [square] 50.8mm x 50.8mm. Also defined parameters for kb and pixels for both personal photo and passport information page. I took the necessary pictures sent them from my phone to my laptop, opened them from dropbox, right  clicked on them and opened them in "Paint" from here i was able to do all that was required.

[TamaraEnLaPlaya]

Thanks Sam, really helpful. I had a look at the tutorial for resizing a single image and then as I already use Imgur to host my pics I had a look in there and found I could use similar in that to resize my pics for the gallery. 

I'll be downloading one of the apps to my Android tomorrow and see how that goes as well.