textpaint.com
TextPaint is an online tool for drawing with text. Users draw, shape and decorate a canvas using ASCII, Unicode, emojis or other characters. The sidebar offers a pencil, paint bucket, text input, select area, character picker, find and replace, line drawing and image-to-ASCII conversion. Artwork can be flipped, rotated, shifted and exported as a text file, HTML or a JavaScript string. It is free and requires no signup.