PNG Mimic

Mimic any binary to PNG.

Details

Embed any binary into IDAT chunk and generate image. Extract binary from IDAT chunk in image.

Due to image size, IDAT chunk size may be larger than binary size, in which case difference will be padded with zero. When extracting binary from image, need to know length of zero padding, so use gAMA (gamma value) chunk to store length.

Output image is square, with width and height approximately equal to square root of binary size divided 3.

Requirements

Property	Value
Color	24 bit RGB
Alpha	No
Filter per Row	No
Chunks	IHDR gAMA IDAT IEND

API

See Deno Document for details.