Does anybody know of software that can batch convert .ai into another format? Preferably png or pdf?
You can use GhostScript for batch output .ai to various formats, i.e. transparent PNG:
gs -dNOPAUSE -dBATCH -sDEVICE=pngalpha -r300 -sOutputFile=out.png in.ai
-r300 is dpi resolution.
For available devices with which you can convert .ai format, reference documentation.
.ai file (from version 9 up), saved the normal way (with PDF compatibility) does not need any special conversion (in most cases). For example, if you take a typical
.ai file ...as I said, saved with PDF compatibility which is the default ... you can simply add