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OfficeJS

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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.

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Spire.XLS for .NET

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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.

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Spire.Presentation for .NET

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A professional PowerPointÂ® 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.

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Spire.PDF for .NET

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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.

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Spire.Email for .NET

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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.

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Spire.Barcode for .NET

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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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Thank you so much for your excellent support and also a thanks to the development team which does great work too. I have now received support for Spire.PDF a couple of times.

Rico Scheller

SIEMENS

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Your support was perhaps the best software support I have ever experienced. I have been writing software for several decades and have worked with many 'support' teams...

Donald Young

L3Harris Technologies

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We are currently using XXX, and we want to switch entirely to your product Spire.PDF, because you offer some nice features (like merging a pdf on top of another pdf).

Paul Ootjers

Nieuws van de Bouw

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We are looking for a .NET assembly to create barcodes. It is important that different code types can be created reliably. Scalability is very important to enable machine scanning...

Andreas Maronde

Wein und Vinos GmbH

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TYPICAL USE CASES

NEWS & EVENTS

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A Collection of Tutorials to Help You Use Our Libraries Easily

05/15

2026

Convert JavaScript to Word with Python Automation

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2026/05/15

Modern development teams often need to share JavaScript or JSX source code with project managers, clients, auditors, or educators who don't use code editors. However, raw .js and .jsx files are...
05/08

2026

How to Embed an Office Document Editor in an HTML Page

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2026/05/08

Modern web applications increasingly require built-in document capabilities for viewing and editing Word, Excel, and PowerPoint files directly in the browser. Instead of redirecting users to...

05/15

2026

Convert PDF to PostScript: 4 Methods for High-Quality Printing

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2026/05/15

Looking for a reliable way to convert PDF to PostScript (PS) for high-quality printing? While PDF is the standard for sharing, PostScript offers a printer-ready, vector-based format essential for...