Convert xslx to csv, it is fast, and works for huge xlsx files
Python

README

xlsx to csv converter (http://github.com/dilshod/xlsx2csv)

Converts xslx files to csv format.
Handles large XLSX files. Fast and easy to use.

Supported version:
 - 2.4
 - 2.7
 - 3.4

Installation:
  sudo easy_install xlsx2csv
  or
  pip install xlsx2csv

Usage:
 xlsx2csv.py [-h] [-v] [-a] [-c OUTPUTENCODING] [-s SHEETID]
                   [-n SHEETNAME] [-d DELIMITER] [-l LINETERMINATOR]
                   [-f DATEFORMAT] [-i] [-e] [-p SHEETDELIMITER]
                   [--hyperlinks]
                   [-I INCLUDE_SHEET_PATTERN [INCLUDE_SHEET_PATTERN ...]]
                   [-E EXCLUDE_SHEET_PATTERN [EXCLUDE_SHEET_PATTERN ...]] [-m]
                   xlsxfile [outfile]

positional arguments:
  xlsxfile              xlsx file path
  outfile               output csv file path

optional arguments:
  -h, --help            show this help message and exit
  -v, --version         show program's version number and exit
  -a, --all             export all sheets
  -c OUTPUTENCODING, --outputencoding OUTPUTENCODING
                        encoding of output csv ** Python 3 only ** (default: utf-8)
  -s SHEETID, --sheet SHEETID
                        sheet number to convert
  -n SHEETNAME, --sheetname SHEETNAME
                        sheet name to convert
  -d DELIMITER, --delimiter DELIMITER
                        delimiter - columns delimiter in csv, 'tab' or 'x09'
                        for a tab (default: comma ',')
  -l LINETERMINATOR, --lineterminator LINETERMINATOR
                        line terminator - lines terminator in csv, '\n' '\r\n'
                        or '\r' (default: os.linesep)
  -f DATEFORMAT, --dateformat DATEFORMAT
                        override date/time format (ex. %Y/%m/%d)
  -i, --ignoreempty     skip empty lines
  -e, --escape          Escape \r\n\t characters
  -p SHEETDELIMITER, --sheetdelimiter SHEETDELIMITER
                        sheet delimiter used to separate sheets, pass '' if
                        you do not need delimiter, or 'x07' or '\\f' for form
                        feed (default: '--------')
  --hyperlinks, --hyperlinks
                        include hyperlinks
  -I INCLUDE_SHEET_PATTERN [INCLUDE_SHEET_PATTERN ...], --include_sheet_pattern INCLUDE_SHEET_PATTERN [INCLUDE_SHEET_PATTERN ...]
                        only include sheets named matching given pattern, only
                        effects when -a option is enabled.
  -E EXCLUDE_SHEET_PATTERN [EXCLUDE_SHEET_PATTERN ...], --exclude_sheet_pattern EXCLUDE_SHEET_PATTERN [EXCLUDE_SHEET_PATTERN ...]
                        exclude sheets named matching given pattern, only
                        effects when -a option is enabled.
  -m, --merge-cells     merge cells

Expat SAX parser used for xml parsing.

See alternatives:

Bash:
http://kirk.webfinish.com/?p=91

Python:
http://github.com/staale/python-xlsx
http://github.com/leegao/pyXLSX

Ruby:
http://roo.rubyforge.org/

Java:
http://poi.apache.org/


All programs in this directory and subdirectories are published under
license GNU GPL version 2 or (at your option) any later version. For
more information, see COPYING or visit <http://www.gnu.org/copyleft/gpl.html>.