Sites and apps similar to ASCII Art Paint include Monodraw. It's paid, but MonoSketch and Ascii Generator 2 are free. Other options are Playscii, ASCII Art Maker, Letterpress ASCII and Calligraphy. You can choose from more than 10 Diagram Editors like ASCII Art Paint for Linux, Windows, Mac and self-hosting.
Charaster is a browser-based editor for ASCII grahics and art. It provides a robust set of raster-style editing tools such as Line, Rectangle and free-hand drawing tool; all configurable by specifying the character, color and styling to use while drawing.
Versatile Unicode, ANSI & ASCII Art editor for the Linux/Unix/macOS terminal, with animation, 256 color support and custom themes.
