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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

10/20

2026

Convert PowerPoint to Markdown in Python

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2026/10/20

PowerPoint locks content inside slides. Each page is a canvas, and titles and body text sit in separate shape frames. To move that content into documents, a knowledge base, or a large language...
10/20

2026

Add or Delete PowerPoint Slides Using JavaScript in React

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2026/10/20

The same deck often needs more or fewer slides for different occasions: add two case-study pages for a client meeting, then drop the outdated ones after the previous version has been used. Doing this...

10/20

2026

How to Adjust Margins in a PDF: 3 Practical Ways

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2026/10/20

A PDF with narrow margins leaves little room for handwritten notes, review comments, or binding. Too much white space creates the opposite problem: the content occupies less of the page than it needs...