I made a script in perl to convert my .xsl to json

Of course you only need your dependencies.

./Spreadsheet2JSON.pl file=./data-source-example/timeline-world.xlsx outfile=./data-source-example/timeline-world.json row-1-header=1

options:

row-1-header Tell the script that the first row in your spreadsheet
have the headers that will work as keys for the data, otherwise it
will use the column labels as keys. Those keys will be used to store
the data in hashes every row, with the purpose to obtain those values
in O(1). In any case will be an array with all keys generated ordered
from first to last column found.

file The spreadsheet file path to convert.

outfile The json out file path.

Follow the source on github.com.
https://github.com/cesareoaguirre/Spreadsheet2JSON