Comment by tangmi
3 years ago
If subpixels don't count as cheating, you could maybe get away with 1 1/3 x 1 1/3 pixels https://github.com/tangmi/really-small-font
Although I'll admit (ab)using subpixels like this doesn't do good things for readability.
The smallest "readable" I've seen is 1x5: https://advent.blinry.org/2018/17