Modify document with C#, VB.NET, ASP.NET from Sautin Software company
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Latest news - January 27th, 2021

We are happy to offer you a new version of «RTF to HTML .Net 7.5»!

- HTML Writer: added image cache, which allows you not to duplicate the same images several times when saving in HTML.

- DOCX and Tables inside. The order of columns, headers is violated. The issue was fixed.

- HTML Writer: Improved the algorithm to render HTML-document in Fixed mode. Now the separate symbols with own (x,y) coordinates are combining into single words and next into single sentences.

Try for free - January 20th, 2021

We are happy to offer you a new version of «Excel to PDF .Net 5.4»!

- The PDF rendering in Excel has been improved to the PDF .Net component. The Data for duplicate images will not fit twice to the PDF. This reduced the size of the PDF and increased the rendering speed.

- The font matching algorithm for PDF has been improved. An assembly compiled for .NET 5.0 and higher has been added

Try for free - January 18th, 2021

We are glad to offer you new version PDF Focus .Net 7.8! Let's see what the updates:

- new ability to perform OCR during PDF to DOCX, HTML, RTF and Text conversions;

- .NET 5.0 support: Starting from the version 7.8 appeared the SautinSoft.PdfFocus.dll assemblies compiled for a unified platform .NET 5.0.

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October 23rd, 2020

We offer a new version of "Document .Net"!

- Creating a document using DocumentBuilder.
- Added support for Revisions and "Track Changes".
- Added the ability to save PDF/A according to the compliance level.

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May 28th, 2020

We offer a new version of "PDF Vision .Net 5.5"!

PDF Vision .Net can be used in any type of .NET application, either ASP.NET websites or Windows Forms applications, to produce a PDF hard copies from files, URLs and memory streams.
The output settings are customizable – it is possible to set a custom page size, choose page orientation and add text to header and footer of a PDF document or specify page numbers. The library is designed to perform conversion in memory without addressing the hard disk drive.
The component can be used in .NET Framework 2.0 - 4.8 in 32 and 64-bit platforms.

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April 8th, 2020

We offer a new version of "Document .Net 4.4"!

- Added new code example from our customer: How to insert a table in DOCX document after a specific bookmark.
- Added 6 new code examples regarding the Rasterizing feature. See How to save DOCX, PDF, RTF, HTML, Text documents as JPEG and PNG images.
- Added the new property FontSettings.MissingFonts which gets you the list with fonts which were not found during the loading/saving of the current document.
- After getting the list with missing fonts, you may download them from Internet and specify the folder with these fonts via FontSettings.UserFontsDirectory property.
- The algorithm to find a necessary font or analog installed in the current OS has been improved.
- Given this fact, we improved the quality of saving documents to PDF format.
- For your convenience, we've added more than 150 interesting code examples in the API-documentation.
Added the ability to save documents in PDF/A format in the demonstration application (Document Viewer). This demonstration application is free, you can find it inside the Document .Net package.

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March 5th, 2020

We offer a new version of "Document .Net 4.3"!

- Starting from the version 4.3 Document .Net can operate (Read, Write, Modify) with documents containing floating tables.
- A floating table is a table which is not part of the main text flow in the document but is instead absolutely positioned with a specific size and position relative to non-frame content in the document. - Thus, you can load DOCX and RTF documents with floating tables, modify everything you want, and save it to any of supported formats: PDF, DOCX, RTF, HTML, Text, rasterize pages to Images.
- Updated the Table-Autofit algorithm.
- Added SautinSoft.Document.dll assembly compiled for .NET Framework 4.8.
- PDF writer: fixed the issue with soft mask and transparent PNG images. There was the 1px unnecessary border in the earlier versions.
- Added several new Code Examples from our customers.

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October 28th, 2019

We offer a new version of "Document .Net 4.0"!

- Mac OS support.

- .NET Standard 2.0.

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October 10th, 2019

We offer a new version of "PDF Metamorphosis .Net 8.1"!

- Improved the page breaks processing.

- Improved the algorithm to draw cell borders.

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September 17th, 2019

We are glad to offer you new version PDF Focus .Net 7.1.9! Let's see what the updates:

- .NET Standard 2.0: Starting from the version PDF Focus .Net 7.1 appeared the SautinSoft.PdfFocus.dll assembly compiled for .NET Standard 2.0.

- Starting from the version PDF Focus .Net 7.1 is compatible with .NET Standard 2.0

Starting with .NET Standard 2.0, the .NET Framework compatibility mode was introduced. This compatibility mode allows .NET Standard projects to reference .NET Framework libraries as if they were compiled for .NET Standard.

- Added support for Mac OS. Starting from the version 7.1 PDF Focus .Net can be used in Mac OS X and higher.

Starting from the version PDF Focus .Net 7.1 is compatible with Mac OS X

Fixed the issue when loading a PDF document contained Jpeg images and after processing and saving the pictures were converted to PNG format. These actions increased the size of output document.

Fixed a bug with the loss of image quality during clipping when loading PDF documents.

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February 14th, 2019

We offer a new version of "PDF Metamorphosis .Net 7.1"!

- Support of PresetGeometry - a big collection Shape objects in MS Word.

- Fixed the bug with picture fill for Shapes.

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January 4th, 2019

We are happy to offer you a new version of «PDF Metamorphosis .Net!»!

- Improved the algorithm of table height calculation, it became more accurate.

- The number of pages of the original document coincides with the number of pages of the resulting file.

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November 20th, 2018

We are happy to offer you a new version of «Excel to PDF .Net 5.0»!

- We reworked the engine (PDF maker) and the algorithm from Excel to PDF.Net.

- Added assembly compiled for Net Core 2.0 and higher, .Net Framework 4.0 and higher.

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November 20th, 2018

- It is now possible to create various reports in PDF, DOCX, RTF and HTML formats based on the DOCX template and data source (XML document, DataSet, DataTable, List, Dictionary, any of IEnumerable or any object (used as a data source), that implements the IMailMergeDataSource interface.

- The RTF reader has been improved

- Improved the HTML Reader

- Added a new property to HtmlloadOptions.PreserveHyperlinks. This property allows you to set whether to save hyperlinks while loading HTML or to skip them.

- Updated the TableOfEntries.Update () method. This method allows you to update the table of contents in a DOCX or RTF document. Now the result is exactly the same as in MS Word.

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September 26th, 2018

We are happy to offer you a new version of «Document .Net 3.5»!

- It was updated the interface for importing styles and improved the tables processing and rendering of the algorithms.

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June 4th, 2018

The new version of HTML to RTF .Net 7.0!

- The complete support of HTML to DOCX conversion.

- Added new overloaded methods: OpenHtml(), ToRtf(), ToDocx() and ToText(). Which allows to convert between various objects: File, Stream, String, Array of Bytes, URL.

- Added new property 'TableFastProcessing' into the table proccessing algorithm. Now you may choose how to process tables: Fast with middle accuracy or with the maximal accuracy given the tenths of pixel.

- The new HTML to RTF .Net can be used under .Net Core 2.0 and up. We've added support of .Net Core 2.0 and .Net Framework 4.6.1

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January 3rd, 2018

The new version of Document .Net

- The Document .Net can be used under .Net Core 1.1 and up. Also we've prepared build for .Net Framework 4.6.1.

- Another exciting feature is ability to create and write documents in PDF format. As summary, starting from version 3.0 Document .Net gives you API to read and write PDFs.

- We've also implemented Image Rasterizer engine.

- We've added HTML Reader / HTML Writer. Fixed various issues with CSS in HTML Reader.

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September 7th, 2017

The new version of PDF Focus .Net

- The PDF Focus .Net can be used under .Net Core 1.1 and up. We've added support of .Net Core 1.1 and .Net Framework 4.6.1.

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July 24th, 2017

We created a new version Excel to PDF .Net 4.2

- Updated the algorithm which processes and converts the cell formatting.
- Added assembly compiled for .Net 4.6.2.

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May 17th, 2017

We created a new version 6.5 - of PDF Focus .Net

- Convert PDF docs in a Multi-thread mode.
- New algorithm to parse fonts embedded in PDF.
- It's very useful for PHP and VBA developers!

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April 10th, 2017

We are happy to offer new PDF Metamorphosis .Net 6.8!

- We've significantly updated the engine which parses DOCX documents for further converting them into PDF format.

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March 3rd, 2017

We are glad to offer you new Document .Net 2.5!

- Now Document .Net can work in multithreaded mode! In the previous version the component was able to load PDF documents only in a single thread. Starting from the version 2.5 this shortage has been eliminated.

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November 22th, 2016

We created a new version 5.0 - of PDF Vision .Net

Now the PDF Vision .Net convert ASPX page with filled form data to PDF. See our example: ASP.Net - Print ASPX to PDF.

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October 18th, 2016

We created a new version 6.0 - of PDF Focus .Net

  • The component can now find tables even with invisible borders and create from them an Excel spreadsheet.
  • The PDF Focus .Net produces well-formed XML 1.0. You may also specify custom names for XML nodes.
  • Try for free - April 1st, 2016. We are happy to offer new «PDF Vision .Net» 5.0!
  • The new PDF Vision .Net in conjuction with "Edge mode" now can convert any HTML page to PDF or Images even with the most modern CSS.
  • Officially added the HTML to Image conversion direction. Now PDF Vision .Net provides you API to get Bitmap, Jpeg or PNG from any HTML document.
  • Added new assemblies SautinSoft.PdfFocus.dll compiled for x64 platform.
  • Added a lot of new code C# and VB.Net examples for VS 2012 - 2015.
  • We offer your 100% .Net library, which will enhance your Web-Server ASP.Net or Windows Forms application to generate PDF documents on fly.Try for free - March 10th, 2016

We created a new version 6.0 - RTF to HTML .Net

  • Generate new DOCX, Text or RTF document on fly and fill it by necessary data.
  • Load existing DOCX, Text or RTF document and get all it's structure as tree of objects.
  • Modify text, tables and other data in existing document.
  • Parse the document and get the tree of its objects.
  • Replace, merge any data in documents and save as new DOCX, Text or RTF.
  • Convert between DOCX, RTF and Text Try for free - February 29th, 2016

We created a new version 4.0 - Excel to PDF .Net

  • Added a new conversion direction: Excel to DOCX. The component uses own C# engine to create DOCX documents, thus it doesn't require MS Word or other software installed. Try for free

December 07th, 2015

We created a new version 5.5 - of PDF Focus .Net

  • We've improved the algorithm to recognize tables in converting of PDF to Excel and XML. First and foremost, this helped to fix the issue with incorrect merging of columns during tables recognition. Try for free

May 20th, 2015

We created a new version 5.4 - of PDF Focus .Net

  • Added new feature: "Exract images from PDF". Starting from the version 5.4, the component can provide for your app various methods to extract raster images and transform vector graphics to raster images. Furthermore, you may specify to extract images only with a custom diapason of width and height. See new code samples: Try for free.

April 15th, 2015

We created a new version 6.2 - of PDF Metamorphosis .Net

  • First and foremost, added support of "Shapes" processing.
  • Another interesting feature, that PDF Metamorphosis .Net became convert columns.
  • Added support of "wrap text" for images.

April 8th, 2015

We are happy to announce the new version of «RTF to HTML .Net» 5.2!

  • We created algorithm which converts all types of lists to HTML. Furthermore, this algorithm can convert even lists which is not supported in HTML specification. Let us say, with MS Word you may create a list with any symbols in marker. The new version of «RTF to HTML .Net» can reproduce this list using CSS and HTML.
  • Added support of non-standard images which are linked with RTF using attribute INCLUDEPICTURE.
  • Added conversion of page header and footer.

March 26th, 2015

We offer a new version 3.5 - of First PDF Converter

  • Convert a scanned PDF files to RTF.
  • Recognize text and characters from scanned documents (including multipage files), photographs and digital camera captured images.
  • A new version of First PDF Converter for 14 days - 100% FREE - without limitation!

March 10th, 2015

We created a new version 6.1 - of PDF Metamorphosis .Net

  • Convert RTF to PDF.
  • Convet DOCX to PDF (in beta mode).
  • Convert HTML to PDF.
  • Convert Text to PDF.
  • Split and merge PDF documents
  • Split and merge PDF document.
  • Furthermore, during conversion to PDF you may adjust following:
  • Set page size, orientation and margins.
  • Set a single font face, size and color for your PDF document.
  • Add custom headers and footers.
  • Add page numbering.
  • Add custom watermarks to your PDF.
  • Specify the version of produced PDF.
  • Embed all fonts inside PDF.

January 30th, 2015

We created a new version 5.2 - of PDF Focus .Net

  • PDF to Word: Added support of hyperlinks conversion

We created a new version PDF Metamorphosis .Net 6.0!
    The list of new benefits:
  • Added the full support of nested tables.
  • Increased the speed of converting (HTML, RTF) tables to PDF in 5 times.
  • Ability to create a self-contained PDF file with embedded fonts.
  • Improved the algorithm of working with bullets.
  • Added new methods to insert watermarks in PDF during conversion.
  • Redesigned API for the programmer's convenience.
  • Added new code samples in C# and VB.Net for Visual Studio 2015 (Net 4.5, X64).
  • Added methods to convert DOCX to PDF, but in beta mode for now.

We created a new version 5.0 - of PDF Focus .Net

  • Full support for the conversion of PDF format to Word (DOC RTF TXT), HTML, XML, Excel (XLS, XLSX), Images (JPG, PNG, TIFF, BMP and multipage-TIFF.)
  • PDF Focus .NET can quickly convert custom pages and multiple PDF documents at once.


First PDF Converter ver.3 .0 gets a major update:

  • Full support for the conversion of PDF format to Word (DOC RTF TXT), HTML, Excel (XLS, XLSX), Images (JPG, PNG, TIFF, BMP and multipage-TIFF.)
  • First PDF Converter can quickly convert custom pages and multiple PDF documents at once.



We created a new version of RTF-to-HTML .Net!

    Here is the list of features which has been improved:
  • Tables and their properties
  • RTL and LTR text direction
  • Full Unicode support (include Japanese, Chinese, Arabic/Hebrew)
  • Working with various data containers: file, string, stream, array of bytes
  • Paragraph formatting (line spacing, background, margins, borders, etc.)
  • Hyperlinks, Headers and Footers, Annotations (Comments, Tracking changes)



We offer a new version 4.0.1 - of PDF Focus .Net

  • Rest assured, we've worked hard with rolled up sleeves and prepared two new ways of converting: to HTML and to Excel! Starting from the version 4.0 PDF Focus .Net can convert PDF to HTML web-pages and Excel workbooks. These features work absolutely standalone without any dependencies of a Browser or MS Excel, the same as all other features of the PDF Focus .Net
  • Added suport of JBIG2 codec
  • Added suport of JPEG2000 codec
  • Improved the algorithm of font size selection to make a resulted Word document close to original PDF
  • Improved converting of Unicode symbols
  • Fixed the issue with Century Gothic Font
  • Improved the converting of documents with text columns

December 5th, 2013


We offer a new version 4.5.12 - of PDF Vision .Net

  • In this version improved HTML to PDF conversion: now it processes web-pages the same as a browser with 1366x768 resolution.

November 26th, 2013


We offer a new version - of UseOffice .Net

  • Added new conversion direction: PDF to Word. Given this fact, now UseOffice .Net supplies you by an ability to get DOCX, DOC, RTF and Text documents from a PDF. Please keep in mind, this feature works only for Office 2013 or higher. Just in case, if you are looking for absolutely standalone PDF to Word solution.
  • UseOffice .Net now has code samples and binary dll for Visual Studio 2012 and .Net 4.5.
  • Another point of interest, now UseOffice .Net supports MS Office 2013. Furthermore, it have got a new Demo application for Windows 8.
  • To help lessen your burden of deploying the component at your server, we have added a new service: "Installation by our specialist".
  • To check this out first hand, download and try out UseOffice .Net right now!

September 26th, 2013.

convert rtf to html

We offer a new version - of RTF-to-HTML .Net

  • First and foremost, now the component converts RTF to HTML 50% faster than previous versions. This is due the fact that the converting engine was rebuilt and reduced a memory usage.
  • RTF-to-HTML DLL .Net now works 50% faster!
  • On a related note, new version of the component can generate HTML documents with images encoded by base-64 algorithm. Given this fact, it's possible to convert RTF to HTML completely in memory, because an images will be stored inside HTML
  • Furthermore, fixed issues with converting of tables and bulleted lists.

Jul 10th, 2013

convert images to pdf

We offer a new version 4.5.7 of PDF Vision .Net
Fast conversion speed of Images to PDF. The PDF Vision .Net processes now all types of TIFF images even with FAX compression.

Jul 8th, 2013

convert rtf to html

We offer a new version 3.3.7 of RTF-to-HTML .Net

Jul 5th, 2013

convert pdf to html

We offer a new version 5.5.7 of PDF Metamorphosis .Net

Jul 3th, 2013

Convert HTML to Word in C#, VB .NET

We offer a new version 5.1.7 of HTML-to-RTF Pro .Net


Converting of PDF to images: Jpeg, Png, Gif, Multipage TIFF, Bitmap.

OS Windows XP, 2000, 2003, Vista, 7, 8. Platfrom .Net 2.0 or above

December 26th, 2012

convert rtf to html

We are glad to announce a new RTF-to-HTML .Net What's new:

The new version is 100% compatible with Windows 8

Added new code samples for Visual Studio 2012.

December 12th, 2012

Convert HTML to Word in C#, VB .NET

We are glad to announce the establishment a new HTML-to-RTF Pro .Net 5.0!

The new 5.0 version is on 20% faster compare with 4.x

convert html to rtf faster

Added full support of RTL ( (Right -to - Left) text compatible with MS Word, WordPad, RichTextBox and other RTF readers

full support of RTF text

Added new abilities for working with page numbers here: PageNumbers. You may set font family, size and any position to place page numbers

You may set font family, size and any position to place page numbers

  • Added support of height for table rows
  • Improved algorithm for merging RTF documents
  • Significantly improved the conversion of complex HTML tables
  • Now it has 12 months free updates.
27 November 2012

convert pdf to word

We have published a new code samples, and our intention to continually adding new online samples. Now you can learn more about the server and client capabilities of our product - PDF Focus .NET.

Code samples - - October 3rd, 2012.
  • Improved the converting of PDF documents into plain Text documents (extract text from PDF)
  • Added the new property 'Password' to process PDF documents protected by password


  • Improved the qualitity of processing PDF documents with colored images
September 1st, 2012

We've published a new article about UseOffice .Net - ".Net component to convert between DOCX, PDF, Excel, PPTX, HTML, RTF in C#".

August 29th, 2012

We've published a new article about PDF Focus .Net - "How to convert PDF document to RTF or Text document in C # and VB.Net".

August 20th, 2012
  • We have created a new version of the library Excel to PDF. Net
  • Improved formatting of the table cells, and indentations.
  • Excellent display of all the colors.
  • No problems with the image size of the resulting a PDF document.
  • Improved with pagination.
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Since 2002, Sautin Software has been developing and marketing .Net libraries that make it simple to process PDF, HTML and RTF files
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