How to remove extra characters from woff/woff2 font files?

Question

Fonts

Greetings. For example, fontawesome is connected to the site in woff and woff2 formats. There are 400+ icons in this icon font, in fact, you need to use at most 20. Yes, and this stuff weighs almost 100kb, but I need to make a site with an emphasis on speed. How can you compress the woff/woff2 format, leaving only the necessary characters there?

Answer 1

Use the fontello.com
constructor. Assemble the font yourself with the necessary set of icons.

Answer 2

I create a new font in FontForge with the icons I need, and then save it in the formats I need. Or you can select the glyphs you need in app.fontastic.me .