CSV to XLSX Converter

Convert CSV to XLSX online, from any device with a modern browser like Chrome and Firefox.

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  • Easily convert, view or merge unlimited files on your own Windows PC.
  • Process Word, Excel, PowerPoint, PDF and more than 100 file formats.
  • No limit of file size.
  • Batch conversion of multiple files.
  • One app with rich features like Conversion, Viewer, Merger, Parser, Comparison, Signature
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CSVComma Separated Values File

Files with CSV (Comma Separated Values) extension represent plain text files that contain records of data with comma separated values. Each line in a CSV file is a new record from the set of records contained in the file. Such files are generated when data transfer is intended from one storage system to another. Since all applications can recognize records separated by comma, import of such data files to database is done very conveniently.

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XLSXMicrosoft Excel Open XML Spreadsheet

XLSX is well-known format for Microsoft Excel documents that was introduced by Microsoft with the release of Microsoft Office 2007. Based on structure organized according to the Open Packaging Conventions as outlined in Part 2 of the OOXML standard ECMA-376, the new format is a zip package that contains a number of XML files. The underlying structure and files can be examined by simply unzipping the .xlsx file.

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How to convert CSV to XLSX

  • Open free GroupDocs App website and choose GroupDocs.Conversion application.
  • Click inside the file drop area to upload CSV file or drag & drop CSV file.
  • Click on Convert button. Your CSV files will be uploaded and converted to XLSX result format.
  • Download link of result files will be available instantly after conversion.
  • You can also send a link to the XLSX file to your email address.
  • Note that file will be deleted from our servers after 24 hours and download links will stop working after this time period.


  • ❓ How can I convert CSV?
    First, you need to add a file for conversion: drag & drop your CSV file or click inside the white area to choose a file. Then click the "Convert" button. When CSV to XLSX conversion is completed, you can download your XLSX file.
  • ⏱️ How long does it take to convert CSV?
    This converter works fast. You can change CSV to XLSX in a few seconds.
  • 🛡️ Is it safe to convert CSV to XLSX using free GroupDocs converter?)
    Of course! The download link of XLSX files will be available instantly after conversion. We delete uploaded files after 24 hours and the download links will stop working after this time period. No one has access to your files. File conversion (including CSV is absolutely safe.
  • 💻 Can I convert CSV to XLSX on Linux, Mac OS or Android?
    Yes, you can use free GroupDocs converter on any operating system that has a web browser. Our CSV to XLSX converter works online and does not require any software installation.
  • 🌐 What browser should I use to convert CSV?
    You can use any modern browser to convert CSV, for example, Google Chrome, Firefox, Opera, Safari.
  • </> How can I get the source code for CSV to XLSX conversion?
    Detailed examples are available at GitHub in the form of executable projects. If you are only interested in CSV to XLSX conversion then check .NET & Java examples.

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Other Supported Conversions

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

CSV TO TIFF (Tagged Image File Format)
CSV TO TIF (Tagged Image File Format)
CSV TO JPG (Joint Photographic Expert Group Image File)
CSV TO PNG (Portable Network Graphic)
CSV TO GIF (Graphical Interchange Format File)
CSV TO BMP (Bitmap File Format)
CSV TO ICO (Microsoft Icon File)
CSV TO PSD (Adobe Photoshop Document)
CSV TO WMF (Windows Metafile)
CSV TO EMF (Enhanced Metafile Format)
CSV TO WEBP (Raster Web Image File Format)
CSV TO SVG (Scalable Vector Graphics File)
CSV TO JP2 (JPEG 2000 Core Image File)
CSV TO EMZ (Enhanced Windows Metafile Compressed)
CSV TO WMZ (Windows Metafile Compressed)
CSV TO SVGZ (Compressed Scalable Vector Graphics File)
CSV TO HTML (Hyper Text Markup Language)
CSV TO HTM (Hypertext Markup Language File)
CSV TO MHT (MIME Encapsulation of Aggregate HTML)
CSV TO MHTML (MIME Encapsulation of Aggregate HTML)
CSV TO PDF (Portable Document)
CSV TO EPUB (Digital E-Book File Format)
CSV TO XPS (Open XML Paper Specification)
CSV TO TEX (LaTeX Source Document)
CSV TO PPT (PowerPoint Presentation)
CSV TO PPS (Microsoft PowerPoint Slide Show)
CSV TO PPTX (PowerPoint Open XML Presentation)
CSV TO PPSX (PowerPoint Open XML Slide Show)
CSV TO ODP (OpenDocument Presentation File Format)
CSV TO OTP (Origin Graph Template)
CSV TO POTX (Microsoft PowerPoint Open XML Template)
CSV TO POT (PowerPoint Template)
CSV TO POTM (Microsoft PowerPoint Template)
CSV TO PPTM (Microsoft PowerPoint Presentation)
CSV TO PPSM (Microsoft PowerPoint Slide Show)
CSV TO FODP (OpenDocument Flat XML Presentation)
CSV TO XLS (Microsoft Excel Binary File Format)
CSV TO XLSM (Microsoft Excel Macro-Enabled Spreadsheet)
CSV TO XLSB (Microsoft Excel Binary Spreadsheet File)
CSV TO ODS (Open Document Spreadsheet)
CSV TO XLTX (Microsoft Excel Open XML Template)
CSV TO XLT (Microsoft Excel Template)
CSV TO XLTM (Microsoft Excel Macro-Enabled Template)
CSV TO TSV (Tab Separated Values File)
CSV TO XLAM (Microsoft Excel Macro-Enabled Add-In)
CSV TO CSV (Comma Separated Values File)
CSV TO FODS (OpenDocument Flat XML Spreadsheet)
CSV TO SXC (StarOffice Calc Spreadsheet)
CSV TO DOC (Microsoft Word Document)
CSV TO DOCM (Microsoft Word Macro-Enabled Document)
CSV TO DOCX (Microsoft Word Open XML Document)
CSV TO DOT (Microsoft Word Document Template)
CSV TO DOTM (Microsoft Word Macro-Enabled Template)
CSV TO DOTX (Word Open XML Document Template)
CSV TO RTF (Rich Text File Format)
CSV TO ODT (Open Document Text)
CSV TO OTT (Open Document Template)
CSV TO TXT (Plain Text File Format)
CSV TO MD (Markdown)
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