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Node.js SheetJS Tutorial to Export CSV File to Excel File Using xlsx Module in Terminal
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Jun 7, 2025
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0:00
welcome to this uh live stream so in
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this live stream I will show you how to
0:04
convert your CSV file into Excel file in
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NodeJS using a very famous library
0:11
called as sheetjs uh sheetjs is also
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called as xls module if you go to
0:18
npmjs.com just search for this module
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xls and the command is simple you simply
0:25
execute this command to install this
0:27
module so I've already installed it it's
0:30
also known as sheetjs an open-source uh
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library for working with Excel files so
0:37
it's a very simple application which
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converts your commaepparated value file
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which is also called as CSV file so you
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have this input dot CSV file and
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basically it has this content right here
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it has three columns
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name age and country and then we have
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two rows of data and now if I execute
0:58
the script here you will see it will
1:01
convert this CSV file to an Excel XLS
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file right here which is an Excel file
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so if I try to open this file it looks
1:09
something like this it converted this
1:12
CSV file into Excel file we have these
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three columns name age and country and
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then we have the two rows of data as
1:20
well so I will show you how to convert
1:23
this uh CSV file into Excel file in
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NodeJS so now the code is pretty simple
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so I will go step by step on how to
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convert this so first of all just create
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a simple index.js file and right here
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you need to import the necessary modules
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so we simply import the XLS module and
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we simply require it like this and then
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we also need the built-in path module as
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well so we actually imported both these
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modules right here you can see XLS
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module and path module after that we
2:02
need to actually get the input CSV file
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which is also present in the same
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directory so path dot
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join then similarly you'll be doing it
2:15
for the same thing for the output excel
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file as well so here we provided all the
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two files after that now we need to read
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this CSV file for reading the CSV file
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we use this sheet JS module so it
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contains this
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method which is read file and it
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actually reads this input CSV file so we
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simply pass the path here and the second
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argument will be the type what type of
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file is this so it said
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file and the second property that we
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need to pass here which is code page
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which is equal to
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65001 so in this first step here we
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reading the CSV
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file and then after that we just need to
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get the sheet name so for getting the
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sheet name we simply use workbook and it
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contains this function which is sheet
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names so here we put the
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sheet we getting the first sheet and
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then we actually the next step is to get
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the actual sheet so to access that sheet
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we simply use sheets and then we pass
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the sheet name right
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here so after doing this now we need to
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read we need to write this to Excel file
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for writing it for saving it to Excel
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file we construct this new
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workbook and then we again use this
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utils dot and it contains this function
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right here book new to actually create a
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new book and then the next step is to
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append this data so we have this
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function right here which is book append
4:00
sheet and here we pass
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this new workbook that we
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created plus the sheet name and then you
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can give any sheet name so I'm just
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giving sheet one and then lastly we
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simply save this by using the write file
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method so this will save it as a new
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excel file so here we provide new
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workbook alongside with the
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output so whatever that you have given
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the name here output xls
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path and then you can just give it a
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notification message that your excel
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file has
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been created so that's all that we need
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to do right here in this NodeJS script
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so again if I delete this Excel file and
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again run the script so you will see it
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will convert this CSV file into Excel
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file and you will get this file
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created so if I try to open this file
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you will see all the content of this CSV
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file has been exported to Excel file so
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if I add some more records right
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here so as I added more records here
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once again I execute this you will
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see if I open the output excel file you
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will see those records will be reflected
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back so in this easy way NodeJS you can
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export your CSV file into Excel file
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very
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easily and thank you very much for
5:46
watching this video
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