Why ?

There are many many excellent paint programs out there.

Next to the unavoidable PhotoShop there are many excellent pixel art tools like Asesprite, ProMotion NG, GrafX2,...
And even brilliant browser based image editors like PhotoPea, Piskel or Pixelorama, ...

So why make another one?

The main reason is that I wanted a modern tool for creating Amiga Icons, a long gone ancient file format that no modern editor supports. (And that even the icon editors on the Amiga platform struggle with)
Next to that I was missing some pixel-specific features that I knew from the good old Deluxe Paint days.

DPaint.js was born: a tool that combines 3 things:

the pixel approach of Deluxe Paint
the modern features of today's image editors
the platform independent nature of browser based applications.