rpi 20.0.0.8

RTF to PDF Converter for .NET

Package: rpi (rpi.20.0.0.8.nupkg) · Namespace: SubSystems.RP · Publisher: Sub Systems, Inc.

Convert RTF documents to PDF with a single API call — no Microsoft Word, no printer drivers, no third-party components. The converter is a standalone .NET library built on the proven RTF parser from TE Edit Control and the PDF generation engine from WinPDF, and it runs on .NET 6 and later on Windows and Linux (Docker, Azure, and other cloud hosts included).

👉 Product page, evaluation download, and help file: https://www.subsystems.com/rpw.htm

Highlights

• One-call conversion — convert an RTF file or RTF string to PDF with a simple 3-function API.
• Zero dependencies — no Microsoft Word or external programs required on the server.
• Cross-platform — .NET Core / .NET 6+ on Windows and Linux. A separate .NET Framework edition (RPN.DLL) is also available.
• Memory or file output — produce a PDF file on disk, or a PDF string/byte array for streaming from ASP.NET.
• Enterprise-grade fidelity — see the feature list below.
• Simple deployment — delivered as a NuGet package; no installer, nothing written to the system.

Supported RTF Features

• Full character and paragraph formatting
• Advanced tables and nested tables, including vertical text and right-to-left columns
• Text boxes, shapes, positioned images, and frames
• Headers/footers for first, left, right, or both pages
• Footnotes and section endnotes
• Multiple sections with custom columns, page sizes, orientations, and margins
• Embedded and linked graphics
• Complex lists and list overrides
• Unicode text: Arabic, Hebrew, Asian, Indic, and mixed LTR/RTL
• Embedded fonts, bookmarks, cross-references, and table of contents
• Redlined (tracked-change) text and margin comments
• Internal and external hyperlinks, hidden text
• Rich-text fields (page numbers, page counts, dates)
• Form controls: checkboxes, radio buttons, list boxes, dropdowns
• Document embedding and PDF/A, PDF/A-1b, and PDF/UA compliance
• Security permissions and password protection (RC4-128 / AES-128)
• Image-file-to-PDF conversion

If a feature you need isn't listed, contact us — it is likely supported.

Installation

Add the package to your project. The package is included in the distribution ZIP file:

<PackageReference Include="rpi" Version="20.0.0.8" />

Then import the namespace:

using SubSystems.RP;   // C#

Imports SubSystems.RP  ' VB.NET

Quick Start

using SubSystems.RP;

// 1. Apply your license once at application startup.
//    (The license key and number are e-mailed to you after purchase.
//     Omit this step when evaluating the trial version.)
Rpn.RpsSetLicenseInfo("xxxxx-yyyyy-zzzzz", "srabnnnnn-n", "Your Company Name");

// 2. Create the converter.
Rpn rp = new Rpn();
rp.InWebServer = true;   // set to true when hosting in a web app — suppresses all dialogs

// 3a. Convert an RTF file to a PDF file.
bool ok = rp.RpsConvertFile("input.rtf", "output.pdf");

// 3b. Or convert an RTF string to a PDF string in memory...
string pdfString = rp.RpsConvertBuffer(rtfString);

//     ...then write it to disk, or get the raw bytes for streaming.
rp.RpsWriteToFile("output.pdf", pdfString);
byte[] pdfBytes = rp.RpsStrToBytes(pdfString);

Streaming a PDF from ASP.NET

Rpn rp = new Rpn { InWebServer = true };
string pdfString = rp.RpsConvertBuffer(rtfText);
byte[] pdfBytes  = rp.RpsStrToBytes(pdfString);

return File(pdfBytes, "application/pdf", "document.pdf");   // ASP.NET Core

Note: Call RpsSetLicenseInfo only once at startup. Calling it before every conversion degrades performance.

API Overview

Commonly Used Properties

Set these on the Rpn object before converting.

The complete reference is in the help file (see below).

Evaluation Copy, Help File, and Online Demo

Visit https://www.subsystems.com/rpw.htm to:

• Download a free evaluation copy of RTF to PDF Converter for .NET Core (Windows/Linux) or for .NET Framework (C#/WinForms/ASP.NET, 32/64-bit). Each ZIP includes sample code and the product package — just unzip and go. No installer is run on your machine.
• Download the help file (PDF) with the full API reference and usage notes.
• Try it online — upload your own RTF file and see the PDF result in your browser.

Win32 and Win64 native DLL editions (C/C++, Delphi, VB6, ASP, and more) are available from the same page.

Licensing

• Desktop Developer License — for interactive desktop (non-Internet) applications. Each license covers one developer on up to two development computers.
• Server License — required for web, hosted, and server applications.
• Enterprise License — for corporations with revenue over $50 million, large government entities, or when a target customer's revenue exceeds $500 million. Contact us for a quote.
• Perpetual licenses are also available on request.

Licenses include standard technical support, patches, and new releases, with a 20% discount on subsequent-year renewals and a 30-day money-back guarantee. The full license agreement is at https://www.subsystems.com/rpc.pdf.

Support

• Technical support options: https://www.subsystems.com/support.htm
• E-mail: info@subsystems.com
• Phone: 1-512-733-2525

Sub Systems, Inc. · 3200 Maysilee Street, Austin, TX 78728 · https://www.subsystems.com

Copyright © 2006–2025 Sub Systems, Inc. All rights reserved.