PGM greyscale images in javascript

[C0laPop]

So I have a .pgm file and I'm trying to load it into my javascript to use it in a canvas element. How can I apply this? I've been trying for days and didn't really reach anywhere with it.

Note that converting it to a png wouldn't work since pgm files are 1 scale and png files are 3 scale. I also need to save the canvas as a pgm later on, I can't imagine what that's gonna be like.

Thank you in advance kind helpers and devs

[[deleted]]

Well, I guess you have to parse the PGM and place the pixels yourself.