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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

  How to add watermark to XLSX

  • Open this GroupDocs.Watermark free online tool in your favourite browser.
  • Click inside the file drop area to upload a XLSX file or drag & drop a XLSX file.
  • Your XLSX file will be rendered for you to add text and image watermarks instantly.
  • Add text and image watermarks and setup their properties.
  • Download the updated XLSX file with watermarks added.

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 GroupDocs.Watermark for .NET API

Powerful document watermarking .NET library & API.
Integrate this library to your document processing solution and manage watermarks for many document formats!

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 GroupDocs.Watermark for Java API

Java version of GroupDocs.Watermark library & API.
Manage watermarks in your documents in Java!

 GroupDocs.Watermark Cloud

Easy to use cross-platform Cloud solution.
Manage watermarks using Cloud API easily using cURL or existing programming SDKs!

Open-Source UI/UX Solutions

 GroupDocs.Total for .NET and Java

GroupDocs.Total is an open-source UI/UX solution where all GroupDocs products are working together as one.
GroupDocs.Total provides multiple high quality features against over 120 document formats, such as conversion, signature, parser and much more!

Other Watermark App supported file formats

You can also add watermark to many other file formats. Please see the complete list below.