Spire.Doc is a standalone .NET library that enables developers to create, read, write, convert, compare, and print Word documents in C#, VB.NET, ASP.NET, and related .NET platforms. It does not require Microsoft Word to be installed on the development or target system. The library supports a wide range of Word document formats, offers high-quality conversions to and from various file types, and provides comprehensive document processing features suitable for building document-centric .NET applications.

Key Features

Document Creation and Editing Create, edit, and save Word documents programmatically.

• Supports Word 97-2003, 2007, 2010, 2013, 2016, 2019 formats.
• Edit text, paragraphs, tables, headers, footers, and document properties.

Conversion Convert Word documents to multiple formats and vice versa.

• PDF, HTML, XPS, RTF, TXT, XML, EPUB, images (PNG, JPEG, TIFF, SVG, BMP), PostScript, PCL.
• High-quality conversion with preservation of layout and formatting.

Mail Merge Automate document generation with data sources.

• Populate templates with data from DataSet, DataTable, XML, or other sources.
• Supports simple and complex (nested) mail merge scenarios.

Document Comparison Compare two Word documents to highlight differences.

• Useful for version control and document review processes.

Text and Image Extraction Extract content from Word documents.

• Retrieve text, images, comments, and other embedded objects.

Digital Signature and Security Digitally sign, encrypt, and protect documents.

• Prevent unauthorized access, editing, or printing.

Watermarking Add text or image watermarks for branding or confidentiality.

• Supports both static and dynamic watermarking.

Find, Replace, and Highlight Programmatically search, replace, and highlight text.

• Useful for template processing and content review.

Form Fields and Automation Create and manipulate form fields within documents.

• Supports checkboxes, dropdowns, text fields, and automated field population.

High Performance and Compatibility Optimized for speed and reliability in .NET environments.

• Supports .NET Framework, .NET Core, .NET Standard, .NET 5/6/7/8/9, Xamarin, Mono Android.

Benefits

No Office Automation Dependency Eliminates the need for Microsoft Office installation.

• Reduces deployment complexity and licensing costs.
• Improves application stability and performance.

Comprehensive Format Support Handles a wide array of document and conversion needs.

• Ensures compatibility with legacy and modern Word formats.
• Enables integration with diverse business workflows.

Flexible Licensing and Editions Multiple editions to fit different needs and budgets.

• Free, Standard, and Pro editions with varying feature sets.
• Free version allows evaluation and limited usage.

Developer-Oriented API Designed for .NET developers with extensive documentation and support.

• Includes code samples, live demos, and responsive technical support.