Free Spire. Doc for. NET

Free .NET Word API - Processing Word in C#, VB.NET, ASP.NET

Completely Free. NET Word API

Here is a brief summary of Free Spire.Doc for .NET features.

Technical Features

Free Spire.Doc for .NET enables developers/programmers to build WinForms, Web Services, ASP.NET and other type for .NET applications from version 2.0 to 4.5 on 32-bit or 64-bit system.

Generating, Writing, Editing and Saving

Free Spire.Doc for .NET enables quick generating, saving, writing and editing Word documents.
  • Generate and save Word documents (Word 97-2003, Word 2007, Word 2010, Word 2013, Word 2016 and Word 2019).
  • Load and save document with macros, including .doc (Word 97-2003) document with macros and .docm(Word 2007, Word 2010, Word 2013, Word 2016 and Word 2019) document.
  • Write and edit text and paragraphs.


Free Spire.Doc for .NET enables converting Word documents to most common and popular formats.

Inserting, Editing and Removing Objects

Free Spire.Doc for .NET enables to inserting, editing and removing external objects in Word.


Free Spire.Doc for .NET enables formatting contents in documents, including character, paragraphs, pages and whole document.

Mail Merge

Free Spire.Doc for .NET disables executing mail merge function to create records, orders and reports. The commercial Edition of Spire.Doc supports the mail merge function.
  • Perform simple mail merge fields (name and value) to create single item.
  • Execute mail merge to create a group of data records with connecting customized data source.
  • Populate document with data from .NET data source including DataSet, DataTable, DataView or any other files (for example, xml) to create large amounts of records or report by using mail merge.

Feature Details

Support Word97~2003 Word2007 Word2010 Word2013 Word2016
Operation Create New Document Edit Existing Document
Save to file Save to stream Save as web response
Document Properties Setup Document Print Setup
Multiple Section Page Break
Document Copy Multiple Document Concatenate
Encrypt Document Decrypt Document
Globally Search Globally Replace
Mail Merge Nested Mail Merge Customize Mail Merge Fill Field
Format and Style Font Color Highlight
Indent List Text Alignment
Building Style Named Style
Content Image Hyperlink Comments Bookmark
Table Table of Content Foot Note Ole Object
Header (Text/Image/Table) Footer (Text/Image/Table)
CheckBoxFormField DropDownFormField TextFormField Textbox
TextWaterMark ImageWaterMark Field (91 types) HTML
Convert Src Type Open Save Dest Type
Doc Dot Docx Xml Txt Html PDF Rtf EPUB
PDF × × × × × × × × × ×
EPUB × × × × × × × × × ×
Not supported in Standard Edition