Usage: pdf2json [options] <PDF-file> [<output-file>]
  -f <int>          : first page to convert
  -l <int>          : last page to convert
  -compress         : Use compressed mode
  -q                : dont print any messages or errors
  -h                : print usage information
  -help             : print usage information
  -i                : ignore images
  -noframes         : use standard output
  -xml              : output for XML post-processing
  -split <int>      : split the output into separate files on every X page. 
                      use '%' as part of output file name to specify where page number should appear (e.g. Paper_%.js)
  -hidden           : output hidden text
  -enc <string>     : output text encoding name
  -v                : print copyright and version info
  -opw <string>     : owner password (for encrypted files)
  -upw <string>     : user password (for encrypted files)