Before we start .. You should open a tab for pixlr first ...

How to make PNGs
Easy ways :)

1st step ..
click create new Image and make sure that the transparent ischecked

2nd step ..
click file and open the picture you want to make as a PNG

3rd step ..
click the wand tool at the tool rectangle .

4th step ..
then click the backgroud you want to delete .

5th step ..
it will be highlighted then press backspce then poof !! The background is deleted , keep clicking until the back gound was fully empty .

6th step ..
Save it as a PNG
By clicking at the arrow pointing down in the box that will appear then select PNG

IMNO : ( IMportant NOte )

If you pick a picture with a background af many lines and colors , it will be hard to make as png because you have to click on it using the wand tool several times . It will be more easy if you'll pick a picture with plain background.
But if you really need it. You can just erase it with the erase tool .

Tutorials
Bebe RiriSs