CSV to XLSX Converter

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

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Convert your CSV files online. You can convert your CSV documents from any platform (Windows, Linux, macOS). No registration needed. Just drag and drop your CSV file on upload form, choose the desired output format and click convert button. Once conversion completed you can download your XLSX file.

You even can perform more advanced conversions. For example you can convert password protected documents. Just expand LoadOptions and enter the password of your file. Or you can add a watermark to the converted XLSX file. Expand the ConvertOptions and fill the fields for watermarking.

Converted XLSX files are stored in the cloud. Privacy is 100% guaranteed. All documents are removed from the cloud after 24 hours.

You can convert your CSV documents from anywhere, from any machine or even from a mobile device. The CSV converter is always available online and is completely free.

Free Document Conversion, Viewer, Merger app for Windows

  • 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
  • Regular FREE updates with new features coming every month
Free Download

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 our free CSV to XLSX converter website.
  • 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 our free 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 our free CSV to XLSX 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.

Other Supported Conversions

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

CSV TO PDF Converter (Portable Document)
CSV TO EPUB Converter (Digital E-Book File Format)
CSV TO XPS Converter (Open XML Paper Specification)
CSV TO TEX Converter (LaTeX Source Document)
CSV TO PPT Converter (PowerPoint Presentation)
CSV TO PPS Converter (Microsoft PowerPoint Slide Show)
CSV TO PPTX Converter (PowerPoint Open XML Presentation)
CSV TO PPSX Converter (PowerPoint Open XML Slide Show)
CSV TO ODP Converter (OpenDocument Presentation File Format)
CSV TO OTP Converter (Origin Graph Template)
CSV TO POTX Converter (Microsoft PowerPoint Open XML Template)
CSV TO POT Converter (PowerPoint Template)
CSV TO POTM Converter (Microsoft PowerPoint Template)
CSV TO PPTM Converter (Microsoft PowerPoint Presentation)
CSV TO PPSM Converter (Microsoft PowerPoint Slide Show)
CSV TO FODP Converter (OpenDocument Flat XML Presentation)
CSV TO AZW3 Converter (Kindle eBook format)
CSV TO SVG Converter (Scalable Vector Graphics File)
CSV TO XLS Converter (Microsoft Excel Binary File Format)
CSV TO XLSM Converter (Microsoft Excel Macro-Enabled Spreadsheet)
CSV TO XLSB Converter (Microsoft Excel Binary Spreadsheet File)
CSV TO ODS Converter (Open Document Spreadsheet)
Convert CSV TO XLTX (Microsoft Excel Open XML Template)
Convert CSV TO XLT (Microsoft Excel Template)
Convert CSV TO XLTM (Microsoft Excel Macro-Enabled Template)
Convert CSV TO TSV (Tab Separated Values File)
Convert CSV TO XLAM (Microsoft Excel Macro-Enabled Add-In)
Convert CSV TO CSV (Comma Separated Values File)
Convert CSV TO FODS (OpenDocument Flat XML Spreadsheet)
Convert CSV TO SXC (StarOffice Calc Spreadsheet)
Convert CSV TO JSON (JavaScript Object Notation File)
Convert CSV TO XML (Extended Markup Language)
Convert CSV TO HTM (Hypertext Markup Language File)
Convert CSV TO HTML (Hyper Text Markup Language)
Convert CSV TO MHTML (MIME Encapsulation of Aggregate HTML)
Convert CSV TO MHT (MIME Encapsulation of Aggregate HTML)
Convert CSV TO TIFF (Tagged Image File Format)
Convert CSV TO TIF (Tagged Image File Format)
Convert CSV TO JPG (Joint Photographic Expert Group Image File)
Convert CSV TO PNG (Portable Network Graphic)
Convert CSV TO GIF (Graphical Interchange Format File)
Convert CSV TO BMP (Bitmap File Format)
Convert CSV TO ICO (Microsoft Icon File)
CSV TO PSD Conversion (Adobe Photoshop Document)
CSV TO WMF Conversion (Windows Metafile)
CSV TO EMF Conversion (Enhanced Metafile Format)
CSV TO DICOM Conversion (Digital Imaging and Communications in Medicine)
CSV TO WEBP Conversion (Raster Web Image File Format)
CSV TO JP2 Conversion (JPEG 2000 Core Image File)
CSV TO EMZ Conversion (Enhanced Windows Metafile Compressed)
CSV TO WMZ Conversion (Windows Metafile Compressed)
CSV TO SVGZ Conversion (Compressed Scalable Vector Graphics File)
CSV TO TGA Conversion (Targa Graphic)
CSV TO PSB Conversion (Adobe Photoshop Image File)
CSV TO DOC Conversion (Microsoft Word Document)
CSV TO DOCM Conversion (Microsoft Word Macro-Enabled Document)
CSV TO DOCX Conversion (Microsoft Word Open XML Document)
CSV TO DOT Conversion (Microsoft Word Document Template)
CSV TO DOTM Conversion (Microsoft Word Macro-Enabled Template)
CSV TO DOTX Conversion (Word Open XML Document Template)
CSV TO RTF Conversion (Rich Text File Format)
CSV TO ODT Conversion (Open Document Text)
CSV TO OTT Conversion (Open Document Template)
CSV TO TXT Conversion (Plain Text File Format)
Viewer Annotation Conversion Comparison Signature Assembly Metadata Search Parser Watermark Editor Merger Redaction Classification Splitter Translation Unlock Protect Scanner