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CSV to XLTX converter

Convert CSV to XLTX online from any device with a free converter.

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About Spreadsheet converter

Convert CSV to XLTX files online with our free spreadsheet converter. Whether you're on Windows 10, Mac, Android or iPhone, converting CSV files is quick and easy.

Spreadsheet file formats like XLSX, XLS, ODS, and CSV are commonly used for organizing and analyzing data. XLSX and XLS are associated with Microsoft Excel and support advanced features, CSV is a simpler format, storing data as plain text. Popular applications for working with tables include Microsoft Excel, Google Sheets, and Apple Numbers.

To change CSV to XLTX just drop your file onto the upload form, pick the output format and hit the Convert button. After the conversion is finished, download your XLTX file instantly. No email needed.

Check our video
CSV

Comma Separated Values File

CSV is a simple, widely used file format for storing tabular data in plain text, making it easy to exchange information between different applications and systems. It is supported by numerous tools, including spreadsheet software like Microsoft Excel and Google Sheets, programming languages like Python and R, and database management systems. The format consists of rows of data separated by line breaks, with each row containing values separated by commas (or other delimiters like semicolons), and it can optionally include a header row, support text encoding, and handle complex data through quoting and escaping mechanisms.

XLTX

Microsoft Excel Open XML Template

XLTX is a file format used for Excel Open XML Spreadsheet Templates, designed to store pre-formatted spreadsheet layouts for creating consistent and reusable Excel documents. It is supported by Microsoft Excel, LibreOffice Calc, and other spreadsheet applications, enabling users to create, edit, and share templates across platforms. The format is based on XML and ZIP compression, allowing for structured data storage, advanced formatting, and customization options such as formulas, styles, and macros.

Add the conversion API to your app

  • Convert over 200 file formats — including PDF, Word, Excel, HTML, images, and many more
  • Load files from disk, URLs, FTP servers, or cloud storage (such as Amazon S3 or Azure)
  • Customize output settings — rotate and reorder pages, add comments, or apply watermarks
How it works

How to convert CSV to XLTX

Step 1
Click inside the file drop area to upload CSV file or drag & drop CSV file.
Step 2
Click on Convert button. Your CSV files will be uploaded and converted to XLTX result format.
Step 3
Download link of result files will be available instantly after conversion.
Step 4
You can also send a link to the XLTX file to your email address.
FAQ

Questions & Answers

Other Supported Conversions

You can also convert CSV into many other file formats. Please see the complete list below.

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