Spire.Doc for .NET

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

  • Overview
  • Features
  • Examples
  • Guideline
  • Support
  • What's New
  • Live Demo

Professional .NET Word Library
without Installing Microsoft Word

Over 1,000,000 Developers Are Already Using Our Libraries
To Create Their Amazing Applications.

Spire.Doc for .NET is a professional Word .NET library specifically designed for developers to create, read, write, convert, compare and print Word documents on any .NET platform (Target .NET Framework, .NET Core, .NET Standard, .NET 5.0, .NET 6.0, Xamarin & Mono Android) with fast and high quality performance.


As an independent Word .NET API, Spire.Doc for .NET doesn't need Microsoft Word to be installed on neither the development nor target systems. However, it can incorporate Microsoft Word document creation capabilities into any developers' .NET applications.


Spire.Doc for .NET is a proven reliable MS Word API for .NET which enables to perform many Word document processing tasks. It supports C#, VB.NET, ASP.NET and ASP.NET MVC. Spire.Doc supports Word 97-2003 /2007/2010/2013/2016/2019 and it has the ability to convert them to commonly used file formats like XML, RTF, TXT, EMF, HTML, TIFF, Markdown and vice versa. Furthermore, it supports to convert Word to PDF, Excel, images (JPG, PNG, SVG), EPUB, PostScript, XPS and PCL (Printer Command Language), and convert XML/RTF/Markdown to PDF, convert HTML to images/PDF/XPS/XML in high quality.

  • Convert

  • Compare

  • Extract

  • eSign

  • Watermark

  • Replace

  • Mail Merge

  • Highlight

  • Header

  • Form

Convert Word to PDF

PDF files are preferred over Word documents because they are safe, simple to open, and easy to manage on any device. PDF is the most popular file format that users would convert Word to.

Compare Documents

If you receive two nearly-identical Word documents, the ideal way to determine whether there are any differences between them is to compare the two documents.

Extract Text and Images

When you just need to get the information in a Word document regardless of its format and structure, you can simply extract the text and images from the document.

Digitally Sign Documents

A digital signature provides assurances about the validity and authenticity of your Word documents. Once a Word document is digitally signed, any changes to the document will invalidate the signature.

Add a Watermark

A watermark is used to declare confidentiality, copyright, or other attributes of the document, or as a decoration to make the document more attractive. You can add either text or image watermarks to Word documents.

Replace Text

The ability to replace existing text (or placeholders) in a Word document makes it possible for programmers to quickly generate Word reports or documents based on a template.

Mail Merge

Mail Merge is a handy feature that allows you to quickly produce multiple documents, such as letters or emails, using information stored in a list, spreadsheet or database.

Find and Highlight

If you want to emphasize some words, you can find and highlight them in a bright color so that the readers could catch them easily.

Headers and Footers

Headers and footers are useful for including information that you want to appear on every page of a document, such as company logo or page number.

Create a Form

Form fields make it easier to collect information. Users can enter information by choosing an item from a drop-down list, inserting text in a combo box, or checking a check box.

.NET

Standalone .NET API

100% independent .NET Word class library
Doesn't require Microsoft Office installed on system.

VERSION

  • Word 97-03
  • Word 2007
  • Word 2010
  • Word 2013
  • Word 2016
  • Word 2019

OPERATION

Read More Operation

Powerful Toolset, Multichannel Support

  • Mail Merge, Create Field, Fill Field, Update Field

  • Protect, Encrypt, Decrypt

  • Create, Modify, Remove hyperlink

  • Insert, Edit, remove bookmark

  • Find Replace Highlight

  • Merge and Split Word document

  • Header and Footer

  • Insert, Reply, remove comment

  • Create & Update Table

  • Print Word Document

  • Image and Shape

  • Digital Signature

CONVERSION

Read More Conversion

Convert File Documents with High Quality

  • PDF

  • XPS

  • EPUB

  • SVG

  • PCL

  • Image

Doc/Docx

  • ODT

  • XML

  • HTML

  • RTF

  • TXT

  • PNG

  • BMP

  • JPEG

  • EMF

  • TIFF

MAIN FUNCTION

Only Spire.Doc for .NET,
No Microsoft Office Automation

Spire.Doc for .NET is a totally independent .NET Word class library which doesn't require Microsoft Office installed on system. Microsoft Office Automation is proved to be unstable, slow and not scalable to produce MS Word documents. Spire.Doc for .NET is many times faster than Microsoft Word Automation and with much better stability and scalability.

Convert File Documents
with High Quality

By using Spire.Doc for .NET, users can save Word Doc/Docx to stream, save as web response and convert Word Doc/Docx to XML, RTF, TXT, EMF, HTML, TIFF, Markdown and vice versa. Spire.Doc for .NET also supports to convert Word to PDF, Excel, images (JPG, PNG, SVG), EPUB, PostScript, XPS and PCL (Printer Command Language), and convert XML/RTF/Markdown to PDF, convert HTML to images/PDF/XPS/XML in high quality.

Richest Word Document
Features Support

A common use of Spire.Doc for .NET is to create Word document dynamically from scratch. Almost all Word document elements are supported, including page, sections, headers, footers, digital signature, footnotes, paragraphs, lists, tables, text, fields, hyperlinks, bookmarks, comments, images, barcodes, styles, background settings, printing features, document settings and protection. Furthermore, drawing objects including shapes, textboxes, images, OLE objects, Latex Math Symbols, MathML Code and controls are supported as well.

Simple & Easy to Process
Pre-Existing Word Documents

Spire.Doc for .NET enables developers to process pre-existing Word documents. It supports search and replace function, alignment, page break, fill field, document concatenate, document copy, print, complex and deeply nested mail merge, etc.

High Performance

Other Technical Features

By using Spire.Doc, developers can build any type of a 32-bit or 64-bit .NET application including ASP.NET, Web Services, WinForms, Xamarin and Mono Android, to create and handle Word documents.

Pro Edition $999

Pro Edition supports converting files from Word to PDF, HTML to Word, Word to HTML, Word to XPS, Word to Text, Word to Image, Word to SVG and Word to XML(the Word can be either .Doc or .Docx).

Standard Edition $799

Unlike Pro Edition, the Standard Edition doesn't support appending HTML to Word, print or conversion of any kind mentioned above.

Standard Edition doesn't work on .NET Core, Microsoft Azure.

Free Edition $0

Free version is limited to 500 paragraphs and 25 tables. This limitation is enforced during reading or writing files.

When converting word documents to PDF and XPS files, you can only get the first 3 page of PDF file.

* The Differences between Standard and Pro Edition lie in the feature of Print function and File Conversion.

GET STARTED

Free Trials for All Progress Solutions

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

Technical Features

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, .NET 5.0 and .NET 6.0 on 32-bit or 64-bit system.From Spire.Doc v 6.7.4, Spire.Doc starts to support .NET Core, .NET standard, MonoAndroid and Xamarin.iOS.

Generating, Writing, Editing and Saving

Spire.Doc for .NET enables quick generating, saving, writing and editing Word documents.

Converting

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

Inserting, Editing and Removing Objects

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

Formatting

Spire.Doc for .NET enables formatting contents in documents, including character, paragraphs, pages and whole document.
  • Format all characters in document, including fonts, sizes, colors, effects etc.
  • Format paragraphs, including built-in styles, indents, spacing, bullets, alignment, headings and number list style etc.
  • Format Word tables, including cell fonts and colors, cell background color, cell alignment, cell borders and column width/row height setting.
  • Format Word page, including page breaks, border, margins, paper size and orientation.
  • View document with different document view types, zoom percent and zoom types.

Mail Merge

Spire.Doc for .NET enables executing mail merge function to create records, orders and reports.
  • 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
Doc √ √ √ √ √ √ √ √ √ √ √
Dot √ √ √ √ √ √ √ √ √ √ √
Docx √ √ √ √ √ √ √ √ √ √ √
Xml √ √ √ √ √ √ √ √ √ √ √
Txt √ √ √ √ √ √ √ √ √ √ √
Html √ √ √ √ √ √ √ √ √ √ √
PDF × √ × × × × × × × × ×
Rtf √ √ √ √ √ √ √ √ √ √ √
EPUB × √ × × × × × × × × ×
Not supported in Standard Edition

Beginners Guide

Beginners Guide is the first step towards learning the basic information of Spire.Doc for .NET

Program Guide List

Program Guide lists the detailed features of our Spire.Doc for .NET and you can search for the information you want.

Video Introduction

The Videos give an operation guide by video. You can check the produce step by step.

Main Functions

Main Functions contain the main features of our Spire.Doc for .NET and you can have brief information of it.

Support FAQs

Frequently asked question for Spire.Doc of technical and function issues.

Forums

We guarantee one business day Forum questions Reply.

We guarantee one business day E-mail response.

Customized Service

Free Customized service for OEM Users.

Live Support via Skype

Skype name: iceblue.support

Temporary License

Apply for a Free Trial License File.

Free Customized Demo

To help you get started quickly, we offer free customized demos to our customers. Please contact support@e-iceblue.com for the free demo. Make sure the demo you want meets the below requirements.
  • It relates to our components stored on E-iceblue online store.
  • It costs less than 2 hours for us to complete it. If it costs more than 2 hours, please contact our sales@e-iceblue.com

Believe The Users

If you have tried out Spire.Doc and found it useful, please consider sharing your experience with others. By sharing your testimonial with us, you will not only help others to make the right decision but will also to earn rewards from us. Please send your testimonials to sales@e-iceblue.com.

This is the list of changelogs of Spire.Doc New release and hotfix. You can get the detail information of each version's new features and bug solutions.

Download Spire.Doc to start a free trial:

Hot Fix Version: 12.10.13

Category ID Description
Bug SPIREDOC-10753 Fixes the issue that paragraph indentation was lost after replacing paragraph text in bookmarks.
Bug SPIREDOC-10764 Fixes the issue that the program was hanging when converting Word to PDF.
Bug SPIREDOC-10816 Fixes the issue that some parts of the page content were lost after converting Word to PDF.

Hot Fix Version: 12.10.5

Category ID Description
New feature - Adds new methods to track the addition, deletion, and modification of document elements. 
public void StartTrackRevisions(string author);
public void StartTrackRevisions(string author, DateTime dateTime);
public void StopTrackRevisions();
New feature SPIREDOC-10831 Supports modification of the revision author. 
range.InsertRevision.Author = "e-iceblue";
Bug SPIREDOC-9646 Fixes the issue that the table content was missing when converting Word to PDF.
Bug SPIREDOC-10588 Fixes the issue that the program threw an "ArgumentException" when converting Word to HTML.
Bug SPIREDOC-10727 Fixes the issue of blank content when converting Word to PDF.
Bug SPIREDOC-10766 Fixes the issue that the program threw a "Cannot insert an object of type Paragraph into the Document" exception when loading Word document.

Hot Fix Version: 12.8.12

Category ID Description
Bug SPIREDOC-10738 Fixes the issue that the customXml appeared after replacing text.
Bug SPIREDOC-10743 Optimizes the file size for converting Word to OFD.

Hot Fix Version: 12.8.2

Category ID Description
Bug SPIREDOC-10219 Fixes the issue that extra blank pages are generated when converting Word to OFD.
Bug SPIREDOC-10365 Fixes the issue that the VBA was lost after saving Docm.
Bug SPIREDOC-10389 Fixes the issue that the application threw the exception "Wrong Word version" when loading Word documents encrypted using the WPS tool.
Bug SPIREDOC-10425 Fixes the issue that the application threw the exception 'System. ArgumentNullException' when converting Word to PDF.
Bug SPIREDOC-10456 Fixes the issue that the borderless text boxes added using the WPS tool were not successfully parsed.
Bug SPIREDOC-10554 Fixes the issue that the images didn't display when adding HTML that contains the image paths starting with https.
Bug SPIREDOC-10587 Fixes the issue that the application threw the exception "Unknown boolean value" when converting Word to PDF.

Hot Fix Version: 12.7.3

Category ID Description
Bug SPIREDOC-10644 Fixes the issue that the image data was failed to be filled during mail merge.

Hot Fix Version: 12.6.10

Category ID Description
New feature - Adds the Document.SaveFontFallbackRuleSettings() method to save the XML of the document's default font replacement rules. 
Document document = new Document();
document.LoadFromFile(inputFile);
document.SaveFontFallbackRuleSettings("FontReplacementRuleSettings.xml");
New feature - Adds the Document.LoadFontFallbackRuleSettings() method to load custom font replacement rules in XML format for conversion. 
Document document = new Document();
document.LoadFromFile(inputFile);
document.LoadFontFallbackRuleSettings(“CustomFontReplacementRuleSettings.xml”);
document.SaveToFile(outputFile, FileFormat.PDF);
Bug SPIREDOC-10425 Fixes the issue that the program threw "System.ArgumentNullException" error when converting Word documents to PDF.
Bug SPIREDOC-10544 Fixes the issue that the images were not displayed after converting HTML to Word.
Bug SPIREDOC-10554 Fixes the issue that images and hyperlinks were incorrect after converting Markdown to Docx.
Bug SPIREDOC-10587 Fixes the issue that the program threw "Unknown boolex value" error when converting Word to PDF.

Hot Fix Version: 12.6.1

Category ID Description
New feature - Supports AI features: document generation, document polishing, document translation, abstract generation, summary creation, spelling check, object recognition, article continuation, as well as questions and answers.
Bug SPIREDOC-10196 Fixes the issue that the layout was incorrect when printing Word documents.
Bug SPIREDOC-10211 Fixes the issue that the fonts were incorrect after converting Word to HTML.
Bug SPIREDOC-10221 Fixes the issue that the contents were incorrect after converting Word to OFD.
Bug SPIREDOC-10353 Fixes the issue that the program threw a "System.NullReferenceException" when loading a Word document.
Bug SPIREDOC-10515 Fixes the issue that the program threw a "System.NullReferenceException" when converting a Word document to PDF.

Hot Fix Version: 12.5.5

Category ID Description
New feature - Supports preserving FormField (CheckBox, DropDown, TextFormField) and SDT (CheckBox, Text, RichText, DropDownList, ComboBox) data when converting Word to PDF. 
ToPdfParameterList.PreserveFormFields = true;
New feature - Supports setting three display modes for comments (Hide, ShowInBalloons, ShowInAnnotations) when converting Word to PDF. 
Document.LayoutOptions.CommentDisplayMode = CommentDisplayMode.ShowInAnnotations;
Bug SPIREDOC-10152 Fixes the issue that the table widths and fonts are not correct when converting HTML to Word.
Bug SPIREDOC-10363 Fixes the issue that the program threw "ArgumentOutOfRangeException" when loading Word documents.
Bug SPIREDOC-10371 Fixes the issue that headings were missing after converting Word to HTML.
Bug SPIREDOC-10376 Fixes the issue that table borders were missing after converting Word to HTML.
Bug SPIREDOC-10402 Fixes the issue that tables were missing when converting Word to HTML.
Bug SPIREDOC-10421 Fixes the issue that the program threw "InvalidCastException" exception when comparing Word documents.
Bug SPIREDOC-10427 Fixes the issue that the header was lost after adding a watermark to Word and saving it to PDF.

Hot Fix Version: 12.3.12

Category ID Description
New feature SPIREDOC-10091
SPIREDOC-10217		 Supports loading and manipulating Markdown documents or converting Word documents to Markdown. 
Document doc = new Document();
//load .md file
doc.LoadFromFile("input.md");
//save to .md file
//doc.SaveToFile("output.md", Spire.Doc.FileFormat.Markdown);
//save to .docx file
//doc.SaveToFile("output.docx", Spire.Doc.FileFormat.Docx);
//save to .doc file
//doc.SaveToFile("output.doc", Spire.Doc.FileFormat.Doc);
//save to .pdf file
doc.SaveToFile("output.pdf", Spire.Doc.FileFormat.PDF);
doc.Close();

Document doc = new Document();
//load .docx file
doc.LoadFromFile("input.docx");
//load .doc file
//doc.LoadFromFile("input.doc");
//save to .md file
doc.SaveToFile("output.md", Spire.Doc.FileFormat.Markdown);
doc.Close();
Bug SPIREDOC-10307 Fixes the issue that setting Header.LinkToPrevious and Footer.LinkToPrevious did not take effect.
Bug SPIREDOC-10316 Fixes the issue that some contents were lost after converting Word to PDF.
Bug SPIREDOC-10328 Fixes the issue that the bookmarks were incorrect after converting Word to PDF.
Bug SPIREDOC-10370 Fixes the issue that ReplaceInLine method throws "System.NullReferenceException".

Hot Fix Version: 12.2.10

Category ID Description
New feature SPIREDOC-10052 Supports parsing GIF format content in Word documents.
Bug SPIREDOC-10154 Fixes the issue that incorrect bullets were retrieved.
Bug SPIREDOC-10160 Fixes the issue that GIF format was converted to PNG format after mail merge.
Bug SPIREDOC-10233 Fixes the issue that private font embedding failed when converting Word to PDF.
Bug SPIREDOC-10234 Fixes the issue that characters were incorrect when converting Word to PDF.
Bug SPIREDOC-10235 Fixes the issue that reading fonts failed when converting Word to PDF on MAC systems.
Bug SPIREDOC-10261 Fixes the issue that the program threw "System.NullReferenceException" exception when loading a Docx document.
Bug SPIREDOC-10295 Fixes the issue that the table would have extra borders after loading a Docx document and saving it as a new document.
Bug SPIREDOC-10305 Fixes the issue that the program threw "System.ArgumentException" exception when comparing two Word documents.
Bug SPIREDOC-10308 Fixes the issue that the program hung when getting page count.
Bug SPIREDOC-10318 Fixes the issue that the program threw "System.InvalidCastException" when comparing two Word documents.
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Tab 1

Upload

Maximum file size: 1 MB. Files accepted: doc, docx, txt, rtf.
Click here to browse files.
fileerrors

Convert to

Source file:
filename
Target file type:

Tab 2

Upload

Maximum file size: 1 MB. Files accepted: doc, docx, txt, rtf.
Click here to browse files.
fileerrors

Convert to

Source file:
filename
Search Text:

Tab 3

Word Document

Maximum file size: 1 MB. Files accepted: doc, docx, txt, rtf.
Click here to browse files.
fileerrors

Page Size

Source file:
filename
Target file type:

Page Header

Header Text: Header Image:
Click here to browse files
Header Font: Font Size:
Color: Alignment :

Page Footer

Footer Text: Footer Image:
Click here to browse files
Footer Font: Font Size:
Color: Alignment:

Tab 4

Data

e-iceblue

Option

Header Back Color:
Row Back Color:
Alternation Back Color:
Border Color:
downloads

Tab 5

Agreement Start Date:
Agreement End Date:
Agreement Extension Date:
Documentation Start Date:
Documentation End Date:
downloads

Tab 6

Upload

Maximum file size: 1 MB. Files accepted: doc, docx, txt, rtf.
Click here to browse files.
Source file:
filename
fileerrors

Set text watermark

Text:
Font:
Font Size:
Color:
downloads

Set image watermark

Image:
Click here to browse files
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If you don't find the function you want, please fill in a form to request a free demo from us. Make sure the demo you want meets the following requirements:

  • It is a small project that implements a particular scenario.
  • It relates to our libraries stored on E-iceblue online store.
  • It costs less than 2 hours for us to complete it.
  • It is not a bug report.
  • It is not a feature request.
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