Editing: Click on a pixel to change it's color. The four colors are white, dark gray, light gray, and black. Saving: To save, press the "Save" button. Wait while it scans the image. Then, the Save File list will come up, and the just-performed scan data will be at the top of the list. Click "X" to close the list. Loading: Click the "Load" button and paste in your image code. Let the image render.
As this is a 2bpp image, I used some math to convert each two pixels into a hexadecimal nybble to use 1 character for each 2 pixels, making password codes half the size. Test Image: 555555400000400000400000400000400000400000400000400001 Another test pattern: 55aaff55aaff55aaff55aaff55aaff55aaff55aaff55aaff55aaff If you can load this next code, save it again, and have the same code, the save tool is working; if else, it is not, please tell me about it including the resulting code. 0123456789abcdef00000000000000000000000000000000000001
