Merge XLSX Documents Online via Merger App or using .NET

Develop powerful .NET based XLSX document merging application. Combine multiple XLSX documents into single one online for free via app. Save merged XLSX file as PDF, Images, Word, Excel, PowerPoint & many other formats online.

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Merge XLSX Files Online using App

Upload XLSX files to merge them into single one
Enter the parameters like selection from dropdown
Save to required format: XLSX, PPTX, PDF, DOCX, DOC, Image, HTML, and others
Click the “Merge” button to Merge XLSX into desired format
Download the merged XLSX file
View and get the single merged XLSX file

Merge XLSX File via .NET

Load both XLSX using Workbook class objects.
Select the one Workbook as the base file.
Use Combine method using base obect and second XLSX file object as parameter.
Call Save method and get the merged XLSX files into one.

.NET Code: Merge XLSX Files

XLSX is the default format for modern Excel workbooks. Merging .xlsx files is the most common practice for unified reporting, data analysis, and collaboration.

Use Cases: Merge XLSX Files for Modern Excel Workflows

Monthly Department Reports
Merge departmental .xlsx reports into a single dashboard-ready workbook.
Data Submission Consolidation
Combine submitted .xlsx forms or templates from multiple users or offices.
Project Documentation Compilation
Merge .xlsx project tracking or budgeting sheets into one complete workbook.

Develop XLSX File Merger using .NET

Need to develop .NET utility app to easily merge multiple XLSX files? With Aspose.Cells for .NET , child API of Aspose.Total for .NET , any .NET developer can integrate the above API code to concatenate documents easily. Powerful .NET library for merging documents supports many popular formats including XLSX format.

.NET Merging Library for XLSX Files

There are three alternative options to install “Aspose.Cells for .NET” or “Aspose.Total for .NET” onto your system. Please choose one that resembles your needs and follow the step-by-step instructions:

Install a NuGet Package . See Documentation
Install the library using Package Manager Console within Visual Studio IDE
Install the library by hand using Windows Installer

System Requirements

Our product is fully cross-platform and supports all major .NET implementations following ‘.NET Standard 2.0’ specification:

Microsoft .NET Framework, starting from the earliest 2.0 version, and ending with the latest ‘.NET Framework 4.8’
.NET Core, starting from the earliest 2.0, and ending with the latest ‘.NET 6’
Mono >= 2.6.7

As .NET code doesn’t rely on the underlying hardware or operating system, but only on a Virtual Machine, so you are free to develop any kind of software for Windows, macOS, Android, iOS and Linux. Just make sure you have installed the corresponding version of .NET Framework, .NET Core, Windows Azure, Mono or Xamarin.

We recommend using Microsoft Visual Studio, Xamarin, and MonoDevelop IDE to create C#, F#, VB.NET applications.

For more details please refer to Product Documentation .

FAQs

Can I use above .NET code in my application?
Yes, you are welcome to download this code. One can develop professional solution to combine XLSX using .NET. Use XLSX merging API to develop high-level, platform independent software in .NET.
Is this document merging App work only on Windows?
You have the flexibility to initiate document merging from any device, irrespective of the operating system it runs on, whether it be Windows, Linux, Mac OS, or Android. All that's required is a contemporary web browser and an active internet connection.
Is it safe to use the online app to combine multiple XLSX documents?
Of course! The output files generated through our service will be securely and automatically removed from our servers within a 24-hour timeframe. As a result, the download links associated with these files will cease to be functional after this period.
What browser should to use App?
You can use any modern web browser like Google Chrome, Firefox, Opera, or Safari for online XLSX document merging.
How can I merge multiple XLSX files?
Start by uploading one or more files you want to merge. You can either drag and drop your XLSX files or simply click inside the white area. Afterward, click the 'Merge' button, and our merger will quickly process the uploaded files.
How long does it take to merge the XLSX files?
This merging application operates quickly, It may take a few seconds to upload the files and merge them.

Explore File Merger Options with .NET

Merge BMP Files (Bitmap Image File)

Merge CSV Files (Comma Seperated Values)

Merge DOC Files (Microsoft Word Binary Format)

Merge DOCM Files (Microsoft Word 2007 Marco File)

Merge DOCX Files (Office 2007+ Word Document)

Merge DOT Files (Microsoft Word Template Files)

Merge DOTM Files (Microsoft Word 2007+ Template File)

Merge DOTX Files (Microsoft Word Template File)

Merge Excel Files

Merge GIF Files (Graphical Interchange Format)

Merge Image Files

Merge JPEG Files (Joint Photographic Expert Group)

Merge JPG Files

Merge ODP Files (OpenDocument Presentation Format)

Merge ODT Files (OpenDocument Text File Format)

Merge PDF Files (Portable Document Format)

Merge PNG Files (Portable Network Graphic)

Merge POTM Files (Microsoft PowerPoint Template File)

Merge POTX Files (Microsoft PowerPoint Template Presentation)

Merge Powerpoint Files

Merge PPSM Files (Macro-enabled Slide Show)

Merge PPSX Files (PowerPoint Slide Show)

Merge PPTM Files (Macro-enabled Presentation File)

Merge PPTX Files (Open XML presentation Format)

Merge RTF Files (Rich Text Format)

Merge TIFF Files (Tagged Image File Format)

Merge TSV Files (Tab-separated Values)

Merge Word Files

Merge XLS Files (Microsoft Excel Binary Format)

Merge XLSB Files (Excel Binary Workbook)

Merge XLSM Files (Macro-enabled Spreadsheet)

Merge XLSX Files (Open XML Workbook)

Merge XLT Files (Excel 97 - 2003 Template)

Merge XLTM Files (Excel Macro-Enabled Template)

Merge XLTX Files (Excel Template)