Image Policies Question

Hey I want to upload a picture for the wiki, but I'm not sure how to make the image a .png instead of a .PNG whatever I try doesn't seem to be working.

Try opening the .PNG image into MSPaint, then re-save it as a png (there should be a button that says something like "as a png") image which SHOULD make it .png

I'm actually fairly sure that the name of the image being uploaded doesn't matter, only the destination filename's what counts.

Go to this page, and once you upload the image, go to the "Destination filename:" field and make sure the name is correct and change the filetype to lower case. Or if you were trying to upload from a link, such as example.PNG, just edit the link's page and lowercase the PNG to png, save the page, and click the link again.

I think they are trying to save their image(s) as .png beforehand so they don't have to go through all the destination stuff ^^;

Oh okay the destination filename is .png, but the source filename is .PNG does that matter? And also i did it with snipping tool originally.