Convert CSV to XLSX in bulk.
Large CSV files are supported.

Max size: 200 MB per file

You can convert CSV Learn more about CSV files to


How to convert CSV to XLSX?

You can convert CSV to XLSX with MConverter in three easy steps:
  1. Choose CSV files from your device
    At the top of this page, drag and drop your CSVs.
    You can also click to select CSV files using your operating system's file picker.
    Another method is to press the keyboard shortcut Ctrl+V (⌘+V on Mac) to paste a CSV file you have copied to clipboard.
    Converting a folder with CSV files to XLSX is also supported: simply paste or drag and drop it.
  2. Click or tap on XLSX from the list of target formats
    Alternatively, you can use the search field to quickly find the format you need, whether it's XLSX or something else.
  3. Download your XLSX files, after MConverter has finished processing them
    There's an option to automatically download the converted XLSX files, so you don't have to press the download icon for each XLSX.
    You may see a share icon as well. Use it to directly share the XLSX's with other apps.

About the formats

Extension csv
Category Document/Office file formats
Developed by -
Mime type text/csv


Comma Separated Values (CSV) files are typically used by spreadsheet software and are a form of a simple database. CSV files are text-based, with each line representing a row of data. Every row's text is separated by commas, denoting columns.
Extension xlsx
Category Document/Office file formats
Developed by Microsoft
Mime type application/vnd.openxmlformats-officedocument.spreadsheetml.sheet


An XLSX file is an Excel Spreadsheet, designed for Microsoft Office 2007 and newer. To open XLSX files with Office 2003 or earlier, you need to convert them to XLS.

Common questions about converting CSV to XLSX

Can I convert CSV to XLSX in bulk?

Yes, MConverter supports batch converting of multiple CSVs to XLSX's simultaneously. You can even drag and drop folders containing CSVs to convert to XLSX.
Pasting CSV files and folders copied in the clipboard also works: use Ctrl+V.

Can I convert a CSV file to XLSX, if its size is 1 GB?

Yes, with MConverter Premium you can convert big CSVs, up to 1 gigabyte each.
The free version lets you convert files up to 200 MB. If you need to convert CSV files over 200 megabytes, try MConverter Premium.

Is converting CSVs to XLSX safe with MConverter?

Yes, we encrypt your connection using industry standards. Plus, your CSV files are only accessible by you. 24 hours after the conversion completes, they are automatically deleted from MConverter’s servers. You can also delete your CSVs and other converted files immediately after finishing the conversion by clicking the bin icon.
Join others who have trusted us to convert over 2,843,201 files so far.

How long does it take to convert CSV to XLSX?

For most documents, the wait may be a minute or so. However, MConverter also supports converting larger documents, meaning that it could take a while (up to over an hour, for example).

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