Enlarge / An example of computer-synthesized handwriting generated by Calligrapher.ai. (credit: Ars Technica) Thanks to a free web app called calligrapher.ai, anyone can simulate handwriting with a neural network that runs in a browser via JavaScript. After typing a sentence, the site renders it as handwriting in nine different styles, each of which is adjustable with properties such as speed, legibility, and stroke width.