This program facilitates comparison of various fonts and font rendering parameters.

It displays sample lines of text in sizes from 5 to 36px simultaneously and allows changing of font size range and increment, hinting, autohinting, anti-aliasing, subpixel smoothing, and aspect, immediately showing the changes on the screen. All Unicode characters are divided into blocks of 128 characters, and user can choose block of 128 characters to use as sample line of text.