HTML-to-RTF DLL is a Scripts software developed by SautinSoft. After our trial and test, the software is proved to be official, secure and free. Here is the official description for HTML-to-RTF DLL:

BSEditor: Our library is absolutely standalone, it does't require Microsoft Office or Internet Explorer. We don't use any third-party software. It's completelly written in C# in Visual Studio.

What the component can do:

Convert HTML to Word
Convert HTML to RTF
Convert HTML to Unicode Text
Merge RTF documents
What you may adjust in output Word (RTF) document:

Set page size, orientation, margins, numbers for printing purposes
Specify header and footer in HTML, RTF or Text format
Set Default font face, color, size
Preserve images or not
Specify output format: RTF, Word, Unicode text, ANSI text
Transform tables to text
Where component can be used:

.Net 1.1, 2.0, 3.0, 3.5, 4.0 etc
C#, VB.Net, ColdFusion 8, J#, Delphi.Net, ASP.Net
Works in Shared hosting and Medium Trust level
In ASP.Net, WinForms and Console apps
At server side for creating Web apps
Supported HTML Elements

The component converts XHTML, HTML documents to RTF, DOC and plain Text with support of:

All HTML tags necessary to make exact RTF analog
A, B, BASE, BLOCKQUOTE, BODY, BR, CENTER, DD, DIV, DL, DT, EM, FONT, FORM, Hx, HEAD, HR, HTML, I, IMG, INPUT, LI, LINK, OL, P, PRE, SCRIPT, SELECT, SMALL, SPAN, STRONG, SUB, SUP, TABLE, TD, TEXTAREA , TH, THEAD, TITLE, TR, U, UL
Font face, color and size attributes
These CSS are supported now
CSS styles can be located inside HTML between tags
CSS styles can be stored in local *.css file and linked to HTML/XHTML
CSS styles can be located in Internet/Intranet *.css file and linked to XHTML/HTML file
Full text formatting: bold, italic, underline, strike, superscript and subscript
Text indents
Backgrounds and colors
Tables and nested tables
Images in GIF, JPEG, BMP and PNG formats
Imaged can be local or located in Internet/Intranet
Images will be downloaded and stored inside DOC, RTF document
Unicode support
The component understand Japanese, Chinese, Korean , Cyrillic, etc
Hyperlinks
Special characters, such as   & <, � - ÿ /