PRODUCTS

.NET
Java
C++
Python
JavaScript
OfficeJS
Agent

View All Products

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.

Download Free Trial

Spire.XLS for .NET

Download

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.

Download Free Trial

Spire.Presentation for .NET

Download

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.

Download Free Trial

Spire.PDF for .NET

Download

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.

Download Free Trial

Spire.Email for .NET

Download

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.

Download Free Trial

Spire.Barcode for .NET

Download

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.

Download Free Trial

TRUST PROGRESS FOR INNOVATION AND RESULTS

500K+

Registered
Users

10M+

Active
Users

1M+

Serviced
Developers

20K+

License
Sales Volume

BELIEVE THE USERS

It May Help You to Make the Right Decision

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

READ MORE TESTIMONIAL

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

READ MORE TESTIMONIAL

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

READ MORE TESTIMONIAL

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

READ MORE TESTIMONIAL

TYPICAL USE CASES

NEWS & EVENTS

TUTORIALS

Learn More Articles

A Collection of Tutorials to Help You Use Our Libraries Easily

10/12

2026

Adjust PDF Page Margins with JavaScript in React

Read More

2026/10/12

Page margins decide how much blank space sits between the body and the edge of the paper. Too little and the content crowds the edge and looks cramped; too much and a page holds very little. Existing...
10/12

2026

Add Annotations to a PDF Document in React with JavaScript

Read More

2026/10/12

Once a PDF reaches the review stage it becomes a file that gets passed back and forth: one page needs its key points marked, another needs a note on what to change, and the final copy needs an...

10/12

2026

How to Copy Cell Formatting in Excel

Read More

2026/10/12

When a new section of an Excel worksheet needs to match existing cells, copying the formatting is faster than rebuilding it manually. You can reuse fonts, borders, fill colors, alignment, and number...