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Convert CSV to XLSX via PowerShell

A nifty PowerShell script that will take a delimited CSV file and convert it to a XLSX file.

Having extracted data from a substantial database, I was left with a massive delimited CSV file that required conversion to Microsoft Excel XLSX format.

Screenshot of a CSV file in Microsoft Excel with delimited data.

Screenshot of a CSV file in Microsoft Excel with delimited data.

I wanted to save the file as an XLSX and perform a text-to-columns function, thus combining two steps into one.

Thankfully this is possible using PowerShell.

Screenshot of a XLSX file in Microsoft Excel with data arranged in cells.

Screenshot of a XLSX file in Microsoft Excel with data arranged in cells.

There are several pieces of code online that purport to do this but don’t work well (Example 1, Example 2, Example 3). Online tools exist too (Example 1, Example 2).

The following code is substantially based on the work of Nixta but I have made several changes including the manual specification of the delimiting character. The original code was unable to determine the delimiting character within the CSV and so whilst I was successful in obtaining a XLSX file, it was still semi-colon separated.

The following script will open the specified CSV, save it as an XLSX file to a specified location and perform a text-to-columns based on the delimiter being a semicolon (;). Cells will be in the “General” format.

#Define locations and delimiter
$csv = "c:/path/to/file/whatever.csv" #Location of the source file
$xlsx = "c:/path/to/file/whatever.xlsx" #Desired location of output
$delimiter = ";" #Specify the delimiter used in the file

# Create a new Excel workbook with one empty sheet
$excel = New-Object -ComObject excel.application 
$workbook = $excel.Workbooks.Add(1)
$worksheet = $workbook.worksheets.Item(1)

# Build the QueryTables.Add command and reformat the data
$TxtConnector = ("TEXT;" + $csv)
$Connector = $worksheet.QueryTables.add($TxtConnector,$worksheet.Range("A1"))
$query = $worksheet.QueryTables.item($Connector.name)
$query.TextFileOtherDelimiter = $delimiter
$query.TextFileParseType  = 1
$query.TextFileColumnDataTypes = ,1 * $worksheet.Cells.Columns.Count
$query.AdjustColumnWidth = 1

# Execute & delete the import query
$query.Refresh()
$query.Delete()

# Save & close the Workbook as XLSX.
$Workbook.SaveAs($xlsx,51)
$excel.Quit()
   

Comments

38 responses to “Convert CSV to XLSX via PowerShell”

On 23 February 2017, Milan wrote: Hyperlink chain icon

Good work!

Very useful, it works exactly as described, thanks!

Reply

On 3 April 2017, Axel Öhman wrote: Hyperlink chain icon

How would i go about changing the encoding in the output of this script? I have csv’s containing ÅÄÖ, which turns to gibberish when i run this otherwise excellent script.

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    On 9 July 2018, c3p0 wrote: Hyperlink chain icon

    Just add
    $query.TextFilePlatform = 65001
    worked for me

    Reply

On 9 June 2017, Harun wrote: Hyperlink chain icon

You are gorgeous, million Thanks

Reply

On 21 June 2017, Boulavogue wrote: Hyperlink chain icon

Thanks for this, while my files are converting here’s an addition to the above script (for converting all CSV files in a folder)


gci "c:/path/to/find/files/*.csv" | %{

$Path = $_.DirectoryName
$filename = $_.BaseName

#Define locations and delimiter
$csv = $_.FullName #Location of the source file
#$xlsx = "$Path/$filename.xlsx" # Names & saves Excel file same name/location as CSV
$xlsx = "c:/path/to/save/files/$filename.xlsx" # Names Excel file same name as CSV

$delimiter = ";" #Specify the delimiter used in the file

# Create a new Excel workbook with one empty sheet
$excel = New-Object -ComObject excel.application
$workbook = $excel.Workbooks.Add(1)
$worksheet = $workbook.worksheets.Item(1)

# Build the QueryTables.Add command and reformat the data
$TxtConnector = ("TEXT;" + $csv)
$Connector = $worksheet.QueryTables.add($TxtConnector,$worksheet.Range("A1"))
$query = $worksheet.QueryTables.item($Connector.name)
$query.TextFileOtherDelimiter = $delimiter
$query.TextFileParseType = 1
$query.TextFileColumnDataTypes = ,1 * $worksheet.Cells.Columns.Count
$query.AdjustColumnWidth = 1

# Execute & delete the import query
$query.Refresh()
$query.Delete()

# Save & close the Workbook as XLSX.
$Workbook.SaveAs($xlsx,51)
$excel.Quit()

}

Reply

On 8 August 2017, Menno Bakker wrote: Hyperlink chain icon

Very nice and usefull but can you explain to me what the next three lines of code should be doing?

$query.TextFileParseType = 1
$query.TextFileColumnDataTypes = ,1 * $worksheet.Cells.Columns.Count
$query.AdjustColumnWidth = 1

When i rule them out the created xlsx is still the same.

Greatings..

Reply

On 22 February 2018, Jean wrote: Hyperlink chain icon

In this sample code, the Cells are in the “General” format. How do I change it to “Text” format?

Reply

    On 16 April 2018, Jan wrote: Hyperlink chain icon

    Change TextFileColumnDataTypes from 1 to 2

    Reply

On 16 March 2018, Jean-Francois wrote: Hyperlink chain icon

I would like to delete the file in the the folder where the csv is locate at the end of the convertion. Can you help me

Reply

    On 9 July 2018, c3p0 wrote: Hyperlink chain icon

    wow google for two minutes should have brought you an answer.
    Just add these lines at the end of the code:

    if($?)
    {
    Remove-Item $csv
    }

    Reply

On 16 April 2018, warren wrote: Hyperlink chain icon

the last 2 lines

# Save & close the Workbook as XLSX.
$Workbook.SaveAs($xlsx,51)
$excel.Quit()

save the file in excel format. if for example the file exists and you want to overwrite it how do you overwrite it?

Reply

    On 9 July 2018, c3p0 wrote: Hyperlink chain icon

    You can overwrite by adding this:

    $excel.DisplayAlerts = $False

    Reply

On 14 May 2018, Rahul Udayabhanu wrote: Hyperlink chain icon

Hi, I tried to using this csv to Excel convert in one of storage Capacity reporting script. In script the storage cmd will run and generate a CSV data and I tried to put it as source for this script. It is working successfully when I manually running it. But the xlsx file is not generating when I putting this in a Windows task scheduler and running it , but storage cmd and csv file generation is happening. Could you someone help me on where is wrong. I am confused.

Below is the script:-

$csv = "D:\Temp\UnityScript\Logs\FS_UTIL" +".csv" #Location of the source file
$xlsx = "D:\Temp\UnityScript\Logs\FS_UTIL1" +".xlsx" #Desired location of output

$delimiter = "," #Specify the delimiter used in the file

Remove-Item $csv
Remove-Item $xlsx 

#EMC Storage cmd which give CSV output
uemcli -d X.X.X.X -u XXX -p XXX  /stor/prov/fs show -output csv -filter "Name,Health details" >> $csv

# Create a new Excel workbook with one empty sheet									 
$excel = New-Object -ComObject excel.application                                     
$workbook = $excel.Workbooks.Add(1)                                                  
$worksheet = $workbook.worksheets.Item(1)                                            
                                                                                     
# Build the QueryTables.Add command and reformat the data                            
$TxtConnector = ("TEXT;" + $csv)                                                  
$Connector = $worksheet.QueryTables.add($TxtConnector,$worksheet.Range("A1"))        
                                                                                     
$query = $worksheet.QueryTables.item($Connector.name)                                
$query.TextFileOtherDelimiter = $delimiter                                           
$query.TextFileParseType  = 1                                                        
$query.TextFileColumnDataTypes = ,1 * $worksheet.Cells.Columns.Count                 
$query.AdjustColumnWidth = 1                                                         
                                                                                     
# Execute & delete the import query                                                  
$query.Refresh()                                                                     
$query.Delete()                                                                      
                                                                                                                        
# Save & close the Workbook as XLSX.                                                 
$Workbook.SaveAs($xlsx,51)                                                        
$excel.Quit()

Reply

On 30 May 2018, Olaf wrote: Hyperlink chain icon

Hi guys,

the script is working great but I don’t understand what means the $Workbook.SaveAs($xlsx,51) 51?

What is this for? and why is the script gcreating an xlsx in Documents?

Any help appriciated

Olaf

Reply

On 30 May 2018, igb528 wrote: Hyperlink chain icon

It worked! Ty.

Reply

On 24 October 2018, Julie wrote: Hyperlink chain icon

Any idea how i could treat consecutive delimiters (in my case, a space) as one in the header?

Reply

On 5 December 2018, Mel wrote: Hyperlink chain icon

thank you for the above script, it really helped alot as i was struggling, but now i need to add in a filter in the script for a specific field and delete all other irrelevant columns…. any ideas? i need to trip 200 columns down to 25..

Reply

On 17 December 2018, Oldiki wrote: Hyperlink chain icon

I’ve tried a lot of commands but without success. That’s was the only one that worked to me on Powershell.

Thanks a lot.

Reply

On 16 January 2019, Jason wrote: Hyperlink chain icon

Could this be edited to take in the data from a SQL Query directly? Where the data from the query was returned to a variable, $ReportTable?

$SQLUser = "username"
$SQLPassword = "password"

$SQLServer = "SQLServer\SQLDB"
$SQLDBName = "Database"

$SqlConnection = New-Object System.Data.SqlClient.SqlConnection
$SqlConnection.ConnectionString = "Server = $SQLServer; Database = $SQLDBName; User ID = $SQLUser; Password = $SQLPassword;"

$SqlQuery="select Field01, Field02, Field03
    from SQLTable
    where datevalue between '$beginreportdate' and '$endreportdate'"

$SqlCmd = New-Object System.Data.SqlClient.SqlCommand
$SqlCmd.CommandText = $SqlQuery
$SqlCmd.Connection = $SqlConnection

$SqlAdapter = New-Object System.Data.SqlClient.SqlDataAdapter
$SqlAdapter.SelectCommand = $SqlCmd

$DataSet = New-Object System.Data.DataSet
$rowCount = $SqlAdapter.Fill($DataSet)

$SqlConnection.Close()

$ReportTable = $DataSet.Tables[0]

Reply

On 30 January 2019, Tim wrote: Hyperlink chain icon

Hi,
I use the script and it works fine except it destroys the German letters: “ä”, “ö”, “ü”, “ß”.
In the csv-files, they are visible. When I manually open the csv-files to excel, it also works.

The word “Ausführungsdatum” from csv looks like “Ausführungsdatum” in Excel.

I could not find the place to put -Encode utf8.

Is there anyone who can assist?

Thanks in advance,

Tim

Reply

On 1 February 2019, Nuri wrote: Hyperlink chain icon

I just want to do text to columns function in my xlsx.I dont want to convert csv to xlsx.How can i do that ? Can you help me ?

Reply

On 22 March 2019, David wrote: Hyperlink chain icon

Fantastic thank you! It’s very fast. I had issues getting the comma delimiter to work, but found that by changing the following it worked nicely (Excel 2016 version (Office Pro Plus))

From:
$delimiter=”,”
$query.TextFileOtherDelimiter = $delimiter

To:
$query.TextFileCommaDelimiter = $true

Reply

On 24 April 2019, Swati wrote: Hyperlink chain icon

Hello, I am very new to powershell scripting..Above mentioned code works for copying csv to xls file. But entire data in csv which is in comma separated format gets saved in xls single column. How can I split the column into multiple columns pls?

Reply

On 6 June 2019, Sibonelo Duma wrote: Hyperlink chain icon

i want to extract specific rows ( say 5 row in the middle) from the csv to xlsx, how can i do it? everything works well but can’t get the required rows only

Reply

On 2 July 2019, Daniel wrote: Hyperlink chain icon

Hello,

work great for me. But… :)
I thought It will hepl me to workaround issue that excel can show only one bilion entries. Because of that I couldn’t convers my csv file (4 bilions). Script worked, but in xlsx file is only onie bilion entries. Is there any way to break down this limitation ?

Thank you in advance, and great job!
Daniel.

Reply

On 16 August 2019, robert wrote: Hyperlink chain icon

Can you please edit the script to concert ALL csvs in a folder to ONE single xlsx where each csv is one worksheet ?

Reply

On 9 September 2019, Sush wrote: Hyperlink chain icon

If the same thing I want for single or 2 columns then what should be the changes.

Reply

On 20 September 2019, Lacerda wrote: Hyperlink chain icon

Can you please edit the script to make a coffe after csv-> xlsx convert?
lmao Some people have no concept of ridicule.

great script!

Reply

On 5 October 2019, Vlad the Installer wrote: Hyperlink chain icon

Fantastic! Saved my bacon! thank you!

Reply

On 17 October 2019, Stewart Grainger wrote: Hyperlink chain icon

Does this require Excel to be installed, I wish to run on a server as a scheduled task?

Reply

On 11 November 2019, John wrote: Hyperlink chain icon

Great work everyone! The original script works like a charm and the batch script/overwrite function/delete function work great as well.

Appreciate everyones input here! you are all super stars :)

Reply

On 6 February 2020, Drew wrote: Hyperlink chain icon

Works great. Just what I needed. I appreciate you.

Reply

On 7 April 2020, Bruce wrote: Hyperlink chain icon

Excellent article. This helped me understaand how to convert csv to xlsx. I’ve parsed csv’s before but the converting was giving me fits. No more fits. Thank-You! :-)

Reply

On 10 December 2020, Robin wrote: Hyperlink chain icon

It is almost exactly what I need, the only hiccup is it does not take into account text qualifiers from the csv. I have files that have part numbers, some of which have leading 0s. e.g. “00073” is converted to 73. Changing the format to text (Change TextFileColumnDataTypes from 1 to 2) as posted by Jan does mean that the leading 0s are treated correctly, but does mean all other numeric fields values are treated as text. Is there a way to use text qualifiers, or to specify that only first column is treated as text?

Reply

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