Free Online XLSX to CSV Converter

Use our free-to-use and fast XLSX to CSV file converter to expertly convert your XLSX files perfectly into the CSV file format, ready for further editing or use in your favourite CSV file editing application. Our tool can also batch convert your XLSX files, enabling you to convert up to 20 files in one go.

Or drag and drop your files here to upload.
A maximum of 20 files can be uploaded at once.

Please note: Your XLSX file, once uploaded to our server, will be deleted 15 minutes after upload, so please download your converted XLSX file before this time.

Use the button above to select the XLSX files you wish to upload; once selected, you can click the Upload button to start the conversion. Once all your files have been converted, you will be able to download your CSV files either individually or all together in a compressed ZIP file.

How to Convert your XLSX to CSV Online?

Here are two simple steps to convert your XLSX to CSV using our fast and free XLSX converter tool.

Upload your XLSX file

Click the "Upload a XLSX File" button, then select a XLSX to upload. The maximum file size is 100MB.

Download your CSV

Click the download link to receive your CSV file.

Frequently Asked Questions

How can I convert my XLSX file to CSV?

First, click the "Upload..." button and select your XLSX file to upload. Your XLSX file will be uploaded to our servers. When the XLSX to CSV conversion has completed, you can download your CSV file right away.

How long does it take to convert my XLSX to CSV?

We aim to process all XLSX to CSV conversions as quickly as possible; this usually takes around 5 seconds; however, this can be longer for certain files, so please be patient.

How accurate is the XLSX to CSV conversion?

We aim to provide the best conversion experience. Our tools are under constant review and development, with new features being added every week.

File format information for XLSX and CSV

ExtensionXLSX
Full NameMicrosoft Excel Spreadsheet
TypeDocument
Mime Typeapplication/vnd.openxmlformats-officedocument.spreadsheetml.sheet
FormatBinary

XLSX files have been around since the mid-2000's and are one of the most popular spreadsheet file formats available. It was created by Microsoft as a modern update to the existing Excel XLS file format, with the intention of making future improvements to the format easier to implement than the original XLS format.

Contained within an XLSX file is the spreadsheet data stored within XML files. The XLSX file itself is simply a compressed ZIP container, meaning the format allows for all the Excel assets, such as spreadsheet data, images, and charts, to be stored separately within a single file structure.

As well as being the native format used by Microsoft's Excel application, XLSX files can also be processed by other spreadsheet applications, and third-party conversion tools can easily interface with the XLSX file format.

ExtensionCSV
Full NameComma-separated Values
TypeDocument
Mime Typetext/csv
FormatText

The CSV format is a very simple general data format that has been around for many years and allows any text-based data to be stored and exchanged between systems that can interpret CSV files with minimal development needed.

Data is stored within the file as a series of columns separated by a ',' character. The simplistic nature of CSV files has made them a popular choice for exchanging data between spreadsheet applications such as Microsoft's Excel and databases such as the many SQL-based databases.

Support for CSV files is widespread amongst spreadsheet and database software, making it possible to import and export CSV from Excel and other spreadsheets. SQL databases also offer options to exchange data between CSV files.

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