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Power Automate - Using Flows
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Converting a very large csv file to xlsx on cloud flow

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I'm currently calling an office script





to convert a csv file to xlsx it works perfectly on a csv with 15k rows however it times out after around 15 minutes on a larger (1 million rows) csv. Is there anyway I can get this to work?

  • takolota1 Profile Picture
    4,859 Super User 2025 Season 1 on at
    Re: Converting a very large csv file to xlsx on cloud flow

    I have this template that can convert a CSV to Excel without Office Scripts: https://powerusers.microsoft.com/t5/Power-Automate-Cookbook/CSV-To-New-Excel-Table/td-p/1826096

     

    But it would likely max out at the maximum action data size limits of like 200MB, somewhere between 100000 and 200000 rows.

     


    You’d probably need to split the CSV into batches of like 100,000 rows and adjust the flow to add new rows to an existing table instead of to an entirely new Excel workbook & table.

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