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Spire.Cloud.Office
A powerful online Office viewer and editor developed by E-ICEBLUE. Integrate it into your web server or cloud application, and you'll be able to create, edit, convert, print, view and save MS Word and MS Excel compatible documents in a HTML5 browser on Windows, Linux and Mac.

Working together with Spire.Office for .NET, you can manipulate Word and Excel documents from the server-end using C# or VB.NET code, and then send the results to a browser for further editing in a visual manner...
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A professional Word .NET library designed to create, read, write, convert and print Word document files in any .NET ( C#, VB.NET, ASP.NET, .NET Core, Xamarin ) application with fast and high quality performance.
A professional Excel .NET library that can be used to create, read, write, convert and print Excel files in any type of .NET ( C#, VB.NET, ASP.NET, .NET Core, Xamarin ) application.
A professional PowerPoint® compatible library that enables developers to create, read, write, modify, convert and print PowerPoint documents in any .NET ( C#, VB.NET, ASP.NET, .NET Core, Xamarin ) application.
A professional PDF library applied to creating, writing, editing, handling and reading PDF files without any external dependencies within .NET ( C#, VB.NET, ASP.NET, .NET Core, Xamarin ) application.
A professional Email library specially designed for developers to create, read and manipulate emails in any .NET ( C#, VB.NET, ASP.NET, .Net Core, .Net Standard, MonoAndroid, Xamarin iOS ) application.
A professional barcode library specially designed for .NET developers ( C#, VB.NET, ASP.NET, .NET Core, .Net Standard, MonoAndroid, Xamarin.iOS ) to generate, read and scan 1D & 2D barcodes.
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Check the Latest Product Releases, Event News, And Other Notifications
TUTORIALS
A Collection of Tutorials to Help You Use Our Libraries Easily
  • 07/09
    2025
    Generate Excel File in C# – Create and Export in .NET & ASP.NET
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    2025/07/09
    Generating Excel files in C# is a common task for developers building reporting systems, exporting structured data, or automating Excel-based workflows. Whether you're building desktop tools, web...
  • 07/08
    2025
    Inserting Subscript in Excel with Java [Quick Guide]
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    2025/07/08
    Inserting subscript in Excel is a common requirement, especially when dealing with chemical formulas like CO₂, statistical footnotes, or scientific data. Using subscripts helps make data clearer...
  • 05/30
    2025
    Save Excel Charts as Images (JPG/PNG) – Manual, VBA & C#
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    2025/07/08
    Excel charts are excellent tools for presenting data clearly and effectively. However, when you need to use them outside of Excel — such as in presentations, reports, or websites — it becomes...
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Our Customers All Over the World, Our Products Have Been Widely-Used.
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It May Help You to Make the Right Decision.

Your Tech Support is always excellent. I know a bit about that as I used to run an international development team.
I am always pleased to see people that are careful and professional in the way they deal with customers and help customers to get the best result.
You and your colleagues are very good, so thanks again!
Stephen BriggsPragmasis
Our group was looking for a cost-effective way to add reliable barcode generation to our web application. We tried some free ones that we found to be inaccurate and put our customers at risk.
Spire.Barcode for .Net has proven to pass our test cases as well as come with a free license. Couldn't be happier!
Eric BrownChildrenSAL
Our team was in need of a .NET utility that would allow us to generate barcode images used for emailing receipts.
Spire.Barcode not only provided the ability to generate barcodes and save them as images, but offers a range of customization that suited our needs perfectly.
The fact that these services are completely free is almost too good to be true!
Kevin KelleyClarity Connect
 
Deloitte Consulting LLP purchased Spire.Office for Java to split Word documents by page breaks, merge PDF files, and implement the conversions from PDF to HTML, PDF to Word...
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Intel Corporation purchased Spire.PDF to extract images from PDF files and store them in SQL database, and find & replace hyperlinks in a PDF file. They also used Spire.PDFViewer component...
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The United Nations purchased Spire.Office for .NET to realize the functions of converting Word/Excel to PDF, converting HTML to Word, adding tables to PDF, and inserting HTML...
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Over 300, 000 developers are already using our libraries to create their amazing applications.
 

C#, VB.NET, Java, Android, Cloud Libraries for Word, Excel, PowerPoint, PDF, Barcode, Email, OCR, Etc.

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