Convert PCT to JPG

pct to jpg conversion is most likely related to a graphics conversion between old .pct files and standard .jpg pictures. Many different types of .pct graphics files exists, so it is difficult to give advice about some particular conversion. Your best bet is to use some dedicated graphics converter or graphics editor with broad format support, which will give you highest chance that your pct file is supported. Seems most .pct files are from old QuickDraw app for ancient Macintosh computers.