Using programs like the TEXT to IMAGE converter it should be possible to convert ASCII art files as JPEG images. Could also be done through print to PDF function and exporting PDF to JPEG, but a utility that can do ASC to JPEG conversion directly is easier aproach.
Found 2 different conversion types using the same filename extensions.
Conversion asc to jpeg type 1:
Convert from ASCII text to JPEG bitmap image format.
On-line services software - convert asc to jpeg on web
An online text to image conversion service
File type (from-> to)
Convert from asc file format
JPEG bitmap image format
The tables with software actions are a good pointer for what a certain program does with various file types and often may give users a good hint how to perform certain file conversion, for example the above-mentioned asc to jpeg. However, it is not perfect and sometimes can show results which are not really usable because of how certain programs work with files and the possible conversion is thus actually not possible at all.
Conversion asc to jpeg type 2:
Convert from 3D Studio Max 3D ASCII scene to JPEG bitmap image format.
Microsoft Windows software - convert asc to jpeg on Windows
A 3D CAD translation softwate