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Convert RTF to HTM in C# .NET

Integrate robust document conversion features into your .NET applications with Conholdate.Total API. Convert RTF to HTM and 100+ other file formats without Microsoft Office dependencies. Major features include fully functional C# code examples with options for customizable RTF document, batch conversion, password protection & auto-detection of DOC, DOCX, DOTX & TXT file formats. It supports .NET Framework & .NET Core. Try our free online RTF to HTM converter tool & streamline document processing in your .NET projects.

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Convert RTF to HTM in C# .NET

Follow these simple steps for RTF to HTM conversion in .NET. View the converted HTM document as it is or render and display it as HTML without using any external software or .NET Word library.

Get the respective assembly files from the downloads or fetch the whole package from NuGet to add Conholdate.Total for .NET directly in your workspace.

  • Create Converter object to convert RTF document
  • Set the convert options for HTM format
  • Call Convert method of Converter class instance for conversion to HTM
  • Set options for HTML viewer
  • Create Viewer object to view converted HTM as HTML

Free App for RTF to HTM Conversion



Convert RTF to HTM & Add Watermark

Accurately convert documents (RTF to HTM) exactly as the original file and apply text or image watermarks to HTM pages using .NET document processing API for Word documents.

  • Create Converter object to convert RTF document
  • Create new instance of WatermarkOptions class
  • Specify watermark properties (color, width, text, image etc)
  • Instantiate the proper ConvertOptions class
  • Set Watermark property of the ConvertOptions instance
  • Call Convert method of Converter class instance for conversion to HTM

Load RTF with Advanced Options

During the file conversion process, a wide range of modifications can be made to suit your specific needs. These include specifying passwords for password-protected documents, showing or hiding document comments and annotations, displaying markup and track changes for Word documents, and more.

Additionally, Excel files can have hidden spreadsheets made visible and text file encoding can be set. The Conholdate.Total for .NET API makes it easy to customize your document conversion process with these advanced options.


Convert Password Protected RTF to PDF

Easily convert password-protected RTF to PDF in .NET with Conholdate.Total APIs. No external software needed. Just a few lines of C# code for precise conversion.

  • Define LoadOptions and set password from document specific load options
  • Create Converter object to convert RTF document
  • Instantiate PdfConvertOptions class
  • Call Convert method of Converter class instance for conversion to PDF

Load & Convert Cloud RTF Docs

Using Conholdate.Total for .NET – developers can load and convert RTF documents from various remote locations and cloud document storage resources such as Amazon S3, Microsoft Azure Blob, FTP, local disk, stream or a simple URL. You just have to specify the method to obtain remotely located document stream and then pass it on to the Converter class as a constructor.

Conholdate.Total for .NET APIs are native to Windows Forms, ASP.NET, WPF, WCF or any type of application based on .NET Framework 2.0, .NET Core 2.1 or .NET 5 and higher.


Frequently Asked Questions (FAQs)

Can I convert RTF files to HTM online without paying anything?

Yes. You can easily convert RTF files to HTM online using our completely free converter. It requires no software installation or user registration. Just upload your file, convert and download your HTM.

How do I convert RTF files to HTM using C# code?

Converting RTF files to HTM using C# is straightforward with the Conholdate.Total for .NET APIs. We provide practical, ready-to-use code samples and clear documentation to simplify the integration into your applications.

Do I need to have Microsoft RTF installed to perform RTF-to-HTM conversions with C#?

No. you don’t need Microsoft RTF installed. Conholdate.Total APIs operate independently, allowing you to convert RTF documents directly to HTM format within your .NET applications without RTF itself.

How quickly does your online RTF-to-HTM converter work?

Our online converter is built for speed and efficiency. Most conversions take just a few seconds—even when dealing with larger or more complex RTF files.

Will the online converter preserve formulas and hyperlinks from my RTF files?

Our online RTF-to-HTM converter keeps all your hyperlinks, images, charts and formatting intact. However, RTF formulas are converted into their resulting values in the final HTM, ensuring an accurate and readable document.

Can I automate the RTF-to-HTM conversion on my own servers?

Definitely. You can automate the RTF-to-HTM conversion process using Conholdate.Total for .NET. It’s perfect for handling batch jobs, scheduled conversions, or integrating seamlessly into your backend workflows.

Is it safe to upload my RTF files for online HTM conversion?

Your security and privacy are extremely important to us. Uploaded files are securely processed and automatically deleted from our servers shortly afterward, ensuring your data remains confidential.

Can I convert several RTF sheets into a single HTM using C#?

Yes, you can. Conholdate.Total allows you to select and combine multiple sheets from your RTF workbook into a single HTM document effortlessly.

Does Conholdate.Total for .NET support batch RTF files conversion to other formats?

Yes. Conholdate.Total for .NET supports batch conversion of RTF documents, allowing developers to convert multiple files at once.

Does the RTF to HTM API work with .NET Core, .NET 5 and newer versions?

Absolutely. Our RTF-to-HTM conversion API supports all modern .NET frameworks, including .NET Core, .NET 5, .NET 6, and even .NET 7. This gives you flexibility regardless of your project environment.

Can I add watermarks or passwords to HTMs created from RTF files?

Yes. Conholdate.Total provides convenient features to enhance your HTM documents. You can add watermarks for branding or confidentiality, apply password protection, and even customize other HTM security settings easily during the conversion process.

What file formats for documents and images are supported by Conholdate.Total for .NET?

Conholdate.Total for .NET integrates APIs from Aspose and GroupDocs to enable .NET programmers to perform various document manipulation actions on a wide range of file formats including Word, Excel, PDF, PowerPoint, Visio, HTML and images in .NET, C#, ASP.NET and VB.NET applications.

Can I convert password-protected RTF files to HTM in .NET?

Yes. Conholdate.Total for .NET supports the conversion of password-protected RTF files. With built-in methods to handle encrypted documents, you can securely convert sensitive files to HTM while preserving their confidentiality and integrity.

What are the licensing costs for Conholdate.Total’s RTF to HTM conversion API?

Conholdate.Total for .NET offers a fully functional free trial version for 30 days. Paid plans are available for higher usage levels. Developers should carefully review the pricing and licensing terms before using the document conversion API.

What is RTF file format?

RTF (Rich Text Format) is a document file format developed by Microsoft for cross-platform document interchange that can be used with a variety of word processing applications. It supports features such as text formatting (including font types, sizes, and colors), images, and page layout capabilities. RTF files are stored as plain text, which makes them compatible with virtually any application that supports text files. RTF files are popular for their flexibility and easy readability, as well as their cross-platform compatibility. They are commonly used for sharing documents between different word processing applications, as well as for sending documents as email attachments. The RTF format also offers an advantage in preserving the original formatting of a document. For example, if a word processor changes the default font, the RTF file will continue to display the original font. RTF files are relatively small and fast to load, and can be compressed when sending over the internet. RTF files are commonly used in business and academic settings, and are also a popular choice for online publishing. RTF is also used by many online writing and blogging tools, such as WordPress.

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What is HTM file format?

The HTM file format is a file format used for hypertext documents. It is similar to HTML but has additional features that make it more suitable for web-based applications, particularly for documents that include graphics, audio, and video. HTM files are written in HyperText Markup Language (HTML), a coding language for webpages.

The HTM file format allows for the use of advanced formatting and styling elements, such as tables and images, that are not supported by HTML. HTM files may also include scripting language, such as JavaScript and VBScript, and other languages such as C++, PHP, and Java.

HTM files have several advantages over HTML, including the ability to carefully control the look and design of a web page, and the possibility of incorporating interactive features. They are also more reliable than HTML as they are less likely to become corrupted or to display incorrectly in a web browser.

HTM files can be opened using any web browser, as long as it supports HTML. They can also be opened with HTML editors and other text editors, such as Notepad or TextEdit.

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Popular RTF Conversion Options with .NET

Convert RTF to PDF

(Portable Document Format)

Convert RTF to EXCEL

(Spreadsheet Files)

Convert RTF to IMAGE

(Digital Image Files)

Convert RTF to DOC

(Microsoft Word Binary Format)

Convert RTF to DOCX

(Office 2007+ Word Document)

Convert RTF to DOCM

(Microsoft Word 2007 Marco File)

Convert RTF to DOT

(Microsoft Word Template Files)

Convert RTF to DOTX

(Microsoft Word Template File )

Convert RTF to DOTM

(Microsoft Word 2007+ Template File)

Convert RTF to TXT

(Text Document)

Convert RTF to RTF

(Rich Text Format)

Convert RTF to HTML

(Hyper Text Markup Language)

Convert RTF to HTM

(Hypertext Markup Language File)

Convert RTF to MHTML

(Web Page Archive Format)

Convert RTF to MHT

(MHTML Web Archive)

Convert RTF to XLS

(Microsoft Excel Spreadsheet (Legacy))

Convert RTF to XLSX

(Open XML Workbook)

Convert RTF to XLSM

(Macro-enabled Spreadsheet)

Convert RTF to XLSB

(Excel Binary Workbook)

Convert RTF to XLT

(Excel 97 - 2003 Template)

Convert RTF to XLTX

(Excel Template)

Convert RTF to XLTM

(Excel Macro-Enabled Template)

Convert RTF to XLAM

(Excel Macro-Enabled Add-In)

Convert RTF to CSV

(Comma Seperated Values)

Convert RTF to TSV

(Tab Seperated Values)

Convert RTF to DIF

(Data Interchange Format)

Convert RTF to SXC

(StarOffice Calc Spreadsheet)

Convert RTF to FODS

(OpenDocument Flat XML Spreadsheet)

Convert RTF to PPT

(Microsoft PowerPoint 97-2003)

Convert RTF to PPTX

(Open XML presentation Format)

Convert RTF to PPS

(PowerPoint Slide Show)

Convert RTF to PPSX

(PowerPoint Slide Show)

Convert RTF to PPSM

(Macro-enabled Slide Show)

Convert RTF to POT

(Microsoft PowerPoint Template Files)

Convert RTF to POTX

(Microsoft PowerPoint Template Presentation)

Convert RTF to PPTM

(Macro-enabled Presentation File)

Convert RTF to POTM

(Microsoft PowerPoint Template File)

Convert RTF to ODT

(OpenDocument Text File Format)

Convert RTF to OTT

(OpenDocument Standard Format)

Convert RTF to OTP

(OpenDocument Standard Format)

Convert RTF to ODP

(OpenDocument Presentation Format)

Convert RTF to ODS

(OpenDocument Spreadsheet)

Convert RTF to EMZ

(Windows Compressed Enhanced Metafile)

Convert RTF to WMZ

(Compressed Windows Metafile)

Convert RTF to SVG

(Scalar Vector Graphics)

Convert RTF to SVGZ

(Compressed Scalable Vector Graphics)

Convert RTF to XPS

(XML Paper Specifications)

Convert RTF to TEX

(LaTeX Source Document)

Convert RTF to DCM

(DICOM Image)

Convert RTF to WMF

(Windows Metafile)

Convert RTF to EMF

(Enhanced Metafile Format)

Convert RTF to BMP

(Bitmap Image File)

Convert RTF to PNG

(Portable Network Graphic)

Convert RTF to GIF

(Graphical Interchange Format)

Convert RTF to JPEG

(Joint Photographic Expert Group Image)

Convert RTF to TIFF

(Tagged Image File Format)

Convert RTF to WEBP

(Raster Web Image Format)

Convert RTF to JP2

(JPEG 2000 Core Image)

Convert RTF to TGA

(Truevision Graphics Adapter)

Convert RTF to PSB

(Photoshop Large Document Format)

Convert RTF to PSD

(Photoshop Document)

Convert RTF to EPUB

(Open eBook File)

Convert RTF to MD

(Markdown Language)

Convert RTF to FODP

(Formula One for Data Presentation)

Convert RTF to JPG

(Joint Photographic Expert Group Image)

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