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.Net Components Converts PDF, Word HTML5 with C#, VB .Net

.Net library to convert Text, RTF documents to HTML 3.2, 4.01, HTML5 with CSS and XHTML using C# and VB.Net

.Net library which add ability to your ASP.Net and WinForms application export RTF to HTML, RTF to Text and Text to HTML on fly!

(Zip ).


The RTF-to-HTML DLL .Net is a robust and independent .Net assembly to convert Text, RTF documents into HTML/XHTML documents with CSS. The component is 100% created in managed C# and absolutely standalone. It doesn't require MS Office or any other word-processor.

General Functions

Our component is just a class library (.Net assembly) but with powerfull abilities of exporting:

  • RTF to plain HTML 3.2
  • RTF to HTML 4.01 with CSS
  • RTF to HTML 5 new!
  • RTF to XHTML 1.01
  • Text to HTML
  • RTF to Text
HTML documents converted by RTF-to-HTML DLL .Net are completely valid with W3C rules XHTML documents converted by RTF-to-HTML DLL .Net are completely valid with W3C rules CSS inside HTML documents converted by RTF-to-HTML DLL .Net are completely valid with W3C rules HTML 5 support

The component supports converting with these features:

  • Full text formatting (bold, italic, underline, double underline, strike, superscript, subscript)
  • Images in WMF, EMF, JPG, PNG, BMP, GIF formats
  • Tables and nested tables, border colors and border types, background
  • Font colors, face, size
  • Hyperlinks and ancors
  • Full Unicode (include Japanese, Chinese, Arabic/Hebrew, Russian etc)
  • Special characters, such as €, ™, — etc.
  • RTL and LTR text direction
  • Bullets and ordered lists

The component has methods to convert between files, strings, array of bytes, memory stream objects.

Images can be extracted from RTF and saved to HDD as physical files or stored in memory or stored inside HTML using base64 algorithm.

What is possible to adjust during RTF to HTML conversion?

  • Specify the output format: HTML 3.2, HTML 4.01, XHTML 1.01, HTML5 or plain Text
  • Generating output document in plain HTML 3.2 without CSS
  • Whether to store images on filesystem or embed them into HTML document using base64 encoding
  • Save CSS data between tags <style>...</style> or as inline styles <tag style="...">
  • Specify encoding of output HTML
  • Title and set up converting only part of HTML between <body>...</body> tags
  • Set united font, size and color for document
  • Override the table borders visibility
  • Set single measurement units: pixels, points, mm, ems, inches.
  • Set prefix to style class names in HTML
  • Select default tags for paragraphs <p> or <div>
  • Detect hyperlinks from text and make them real hyperlinks

And a lot of other fun properties which allows you to make HTML document as you wish! See all properties in online documentation.

Why to choose us?

Why to choose SautinSoft?
  • Our component is absolutely standalone and entirely written in 100% managed C# (pe-verifiable)
  • All HTML documents generated with the component are completely compatible with W3C standards and checked by W3C Validator without errors!
  • We have 10-year experience with HTML and RTF formats
  • Low prices and royalty free basis
  • We support our clients before and after purchasing by phone, email, online-chat, skype, forum and remote connecting
  • We are ready to give a discount for everyone
  • No annual fees or subscriptions! Your license will never expire! After purchase you may use the product as long as you wish!

See prices details ...

Platform Independence and Technical Features

The RTF-to-HTML DLL .Net requires only .Net 1.1 or higher platform. Using the RTF-to-HTML DLL .Net you can easily create any type of a 32-bit or 64-bit .NET application including ASP.NET, Azure, Silverlight, WPF, SharePoint, Web Services and WinForms. Our .Net assembly is a Multi-Platform component, you may use it to build your application with Mono platform for Linux, Mac and Android (

  • 100% Created with only managed C#
  • Absolutely standalone, you will need to only copy "SautinSoft.RtfToHtml.dll" into 'Bin' directory
  • No other dependencies
  • Has own RTF parser and HTML writer
  • Doesn't require Microsoft Office ® or any other dependencies
  • Works on any .Net platform (.Net 1.1, 2.0, 3.0, 3.5, 4.0 etc)
  • Works with Windows and even with Linux and Mac (thanks to Mono project
  • Has great abilities to adjust an output HTML, XHTML or Text as you wish
  • Small size of assembly, less than 500 Kb

Compatibility with W3C standards

HTML and XHTML documents produced by our library are completely compatible with W3C standards. We give a lot consideration of testing our HTML documents at W3C Markup validation service after each release of the component.

HTML documents converted by RTF-to-HTML DLL .Net are completely valid with W3C rules XHTML documents converted by RTF-to-HTML DLL .Net are completely valid with W3C rules CSS inside HTML documents converted by RTF-to-HTML DLL .Net are completely valid with W3C rules HTML 5 support

Typical applications where our component can be used

  • News, emails, support information and hyperlink documents
  • Conversion of RTF (rich text format) from database to HTML purposely display it in ASP.Net page
  • Documents with tables structure and embedded graphics
  • Formatted reviews for internet blogs
  • Creating HTML emails with embeded images from RTF
  • Create viewers for RTF based documents

Requirements and compatibility

  • .Net platform (1.1 or higher), because it's 100% managed C# library
  • Works even in Medium Trust level
  • 32-bit and 64-bit compatible

Our products are compatible with all .NET languages and supports all Operating Systems where .NET Framework or Mono can be installed.

Supported Languages : Supported Platforms : Supported Platforms (Mono) :
  • C#   • Windows 98   • Linux:
  • VB.NET   • Windows ME      SUSE, Novell, Red Hat...
  • C++.NET   • Windows NT   • Mac - OS X:
  • Delphi.NET   • Windows 2000      ver.: 10.3, 10.4, 10.5, 10.6...
  • J#   • Windows XP   • BSD:
  • ColdFusion 8   • Windows Server 2003, 2008      OpenBSD, FreeBSD, NetBSD...
  • ASP.NET   • Windows Vista   • Solaris 8.
and many more..   • Windows 7

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