Create a transparent PNG file changing from white-background to black-background


Twitter official client (PC, mobile browser) show image file on white background on timeline.
But if you click or tap the picture, bigger image is shown on black background.
So it can be seen differently if the image has transparent part.

I released a web service to create transparent PNG file which can be seen as the first file you uploaded and can be seen as the second file on black background.

Please try it!

Category: 数学 | Tags: ,