If you don't want to create your own:
At first glance, a font that prints nothing seems useless. However, professionals have found ingenious applications for glyphless fonts. glyphless font
This technology is primarily utilized in searchable text documents to bridge the gap between visual layouts and machine-readable data. Core Applications and Use Cases 1. Optical Character Recognition (OCR) and PDFs If you don't want to create your own:
Defining the width and height of "invisible" characters so that text selection boxes appear in the right place on the screen. Why Not Just Use White Text? glyphless font