I’ve been advising people to post their spreadsheet data as columnar text,
as was done [here](http://superuser.com/q/892744/150988),
[here](http://superuser.com/q/889201/150988), and other places. 
This is not very hard to generate. 
For example, if you have these data:

       ![image of Excel sheet (same data as below)][1]

and you copy and paste as text, you get TSV data:

>Company<kbd>Tab</kbd>Person<kbd>Tab</kbd>Number  
>ACME<kbd>Tab</kbd>L. Fogg<kbd>Tab</kbd>17  
>Sirius Cybernetics Corporation<kbd>Tab</kbd>Zaphod Beeblebrox<kbd>Tab</kbd>42

If you have Unix/Linux (or even Cygwin),
you can get from that to the desired columnar form
with the command `column -t -s$'\t' -o'    '`; as in:

    $ cat data
    Company Person  Number
    ACME    L. Fogg 17
    Sirius Cybernetics Corporation  Zaphod Beeblebrox       42
    
    $ column -t -s$'\t' -o'    ' data
    Company                           Person               Number
    ACME                              L. Fogg              17
    Sirius Cybernetics Corporation    Zaphod Beeblebrox    42

And of course you can reverse the process by copying the above into Excel
and using “Text to Columns”.


  [1]: https://i.sstatic.net/qh8x6.png