https://simplifier.neocities.org/4x4.html

4x4 ASCII Font
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Magnified 4x
Large Font
Actual Size
Font
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Sample Text (Lower Case)
The quick brown fox jumps over the lazy dog 1234567890 times.
Sample Text (Upper Case)
THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG 1234567890 TIMES!
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   Small fonts have always been fascinating to me, so I decided to
make the smallest font possible, which turned out to be 4x4 pixels
per character. The font covers the entire range of visible ASCII
characters, and most are immediately recognizable. A few characters
had to be modified to fit within a 4x4 box, most notably the number
sign (#) and the lower case x. I carefully designed the font so that
no two characters share the same bitmap.

   Although I didn't design this font with any particular function in
mind, it would be useful in any situation where compact text is
needed, such as on extremely low resolution displays. Feel free to
use it for whatever you like.

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EDIT: 3/12/2016

   Improved the lower case "a".

EDIT: 5/24/2018

   With the help of an online font editor, I was able to rapidly test
this font with sample text. This revealed a number of readability
issues, which I was able to improve with a few minor modifications.
After extensive testing of this revised font, I was unable to find
any words or sentences which were illegible or lacked fluidity, so I
now consider it complete.

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