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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

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A Collection of Tutorials to Help You Use Our Libraries Easily

04/01

2026

How to Add Macros to Excel in C# – Read & Edit VBA

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2026/04/01

VBA macros provide a convenient way to automate data processing, formatting, and business logic within Excel, especially for repetitive or rule-based tasks. However, managing macros manually inside...
03/31

2026

How to Add Custom Fonts in Spire.OfficeJS for Frontend Editors

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2026/03/31

Content Preview: Part 1. Adding Custom Fonts in Script-Based Deployment (Product Package) Part 2. Integrating Custom Fonts in Frontend Frameworks like React Common Troubleshooting for Font...

04/03

2026

Convert Markdown to Excel (3 Easy Ways)

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2026/04/03

Markdown (MD) is a favorite tool for writers, developers, and project managers due to its simplicity. But when you need to analyze data, generate reports, or collaborate with teams, Markdown can fall...