BMP2Sixel
Convert BMP images into Sixel images
... of the Sixel images floating around the internet today.
The original BMP2SIX program written April 2001, now is updated to compile under PellesC, and provides a GUI interface. BMP2SIX output examples can be found on SourceForge under the SixelViewer program at this location, https://sourceforge.net/projects/sixelviewer/files/Sixel_Pics/
Release date 10/31/2022 version 1.2 adding Sixel HLS as an output option