How to convert the background to transparent? [closed]

Answer 1

Quick solution without downloading anything is to use online editors that has "Magic Wand Tool".

Answer 2

For Photoshop you need to download Photoshop portable.... Load image e press "w" click in image e suave as png or gif....

Answer 3

I would recommend this (just found via search):

1. http://lunapic.com/editor/?action=load
2. Browse for image to upload OR enter URL of the file (below the image)
   http://i.stack.imgur.com/2gQWg.png
3. Edit menu/Transparent (last one)
4. Click on the red area
5. Behold :) below is your image, it's just white triangle with transparency...
   [dragging the image around in your browser for visibility,
   the gray background and the border is not part of the image]
   
6. File menu/Save Image
   GIF/PNG/ICO image file formats support transparency, JPG doesn't!

Answer 4

Paint.net is a free photo-editing tool that allows for transparent backgrounds. There is a simple example on YouTube http://www.youtube.com/watch?v=cdFpS-AvNCE. If you are still on Windows XP SP2 and that's an issue, I would first recommend doing the free service pack upgrade. But if that is not an option there are older versions of Paint.net that you could download and try.

Answer 5

If you want a command-line solution, you can use the ImageMagick convert utility:

convert input.png -transparent red output.png