user63787: I noticed that the TomThumb.h font included in the Adafruit GFX library has characters that have different widths, which is a problem for me because I'm doing text processing that requires characters to have the same dimensions (width and height). I also noticed that the TomThumb.h font misses some characters (such as ') and so on. I need a way to create/edit fonts for the Adafruit GFX (where I'm using the Adafruit_ST7735 on a 1.8" TFT Display). I've looked around the internet but I couldn't find anything decent.

user72424: I found an online editor that can parse Adafruit GFX font headers, modify, and export the result to create a new font header.  It works very well.  May be a bit late to help OP, but for anyone else looking...
It uses regexes to extract info from the header files, so it's pretty strict on following the layout of GFX font headers provided by Adafruit.
webpage: https://tchapi.github.io/Adafruit-GFX-Font-Customiser/
github: https://github.com/tchapi/Adafruit-GFX-Font-Customiser

63787: <p>I noticed that the TomThumb.h font included in the Adafruit GFX library has characters that have different widths, which is a problem for me because I'm doing text processing that requires characters to have the same dimensions (width and height). I also noticed that the TomThumb.h font misses some characters (such as ') and so on. I need a way to create/edit fonts for the Adafruit GFX (where I'm using the Adafruit_ST7735 on a 1.8" TFT Display). I've looked around the internet but I couldn't find anything decent.</p>
 72424: <p>I found an online editor that can parse Adafruit GFX font headers, modify, and export the result to create a new font header.  It works very well.  May be a bit late to help OP, but for anyone else looking...</p>
<p>It uses regexes to extract info from the header files, so it's pretty strict on following the layout of GFX font headers provided by Adafruit.</p>
<p>webpage: <a href="https://tchapi.github.io/Adafruit-GFX-Font-Customiser/" rel="nofollow noreferrer">https://tchapi.github.io/Adafruit-GFX-Font-Customiser/</a><br />
github: <a href="https://github.com/tchapi/Adafruit-GFX-Font-Customiser" rel="nofollow noreferrer">https://github.com/tchapi/Adafruit-GFX-Font-Customiser</a></p>
