Variable fonts are fonts that have multiple weights, widths, slants, or other variants in one font file. They’ll often enable you to nearly infinitely adjust the width or weight of the type you’re using.

I’ve gathered a set of type for you to test out and use in this project. These are all open source or otherwise free fonts. Install them using FontBook as you would install any font.

Download variable font test set

If you forget how to use these in Illustrator, see the screenshot here.

Links to more information about the included fonts:

Hepta Slab
https://github.com/mjlagattuta/Hepta-Slab

Work Sans (variable)
http://weiweihuanghuang.github.io/Work-Sans/

Recursive
https://www.recursive.design/

Tiny
http://velvetyne.fr/fonts/tiny/

Plex
https://github.com/IBM/plex/tree/master/IBM-Plex-Sans-Variable

Kayak
https://backpacker.gr/fonts/29

Bandeins Sans + Bandeins Strange
http://type.bandeins.de/

Graduate
https://etunni.github.io/Graduate-Variable-Font/

Barlow
https://tribby.com/fonts/barlow/

League Spartan
https://github.com/sursly/league-spartan/

Bandeins + Bandeins Strange
http://type.bandeins.de/

Blinker
https://github.com/supertype-de/Blinker

Montserrat
https://github.com/cosmicmocha/Montserrat

Emberly
https://www.behance.net/gallery/87667103/Emberly-Free-Typeface-54-Styles

If you somehow need MORE variable fonts, check out a whole ton of them (with demos) at: v-fonts.com