http://www.atool.org/img2base64.php
透明图片

<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7">

黑色图片

<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAUEBAAAACwAAAAAAQABAAACAkQBADs=">

转载请注明：有爱前端 » Base64 Encode 1x1px透明GIF图片