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RNC File - What is an .rnc file and how do I open it?
Learn about .RNC files and view a list of programs that open them.
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Overview
What is an RNC file? An RNC file is a compressed archive created by RNC ProPack, a file packing utility. It contains one or more files in the RNC ProPack archive format, which compresses the files into a single archive, reducing their size and making storage and distribution more efficient. RNC files can contain any type of file, including documents, images, or software, and they use ProPack’s proprietary compression algorithm to achieve smaller file sizes.
More Information ProPack and RNC archives were commonly used in the 1980s and 1990s on DOS and early Windows systems to distribute software, backups, and collections of files over limited storage media or slow networks. Users included software developers, hobbyists, and early PC enthusiasts who needed to save disk space or bundle multiple files together for easier sharing. Because ProPack supports multiple packing formats, RNC files were just one of several options available to users for compressing their files. NOTE: RNC is short for Rob Northern Computing.
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Popularity3.0 | 7 Votes
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.RNC File Extension
2 file types use the .rnc file extension.
RNC ProPack Archive
| Developer | RNC |
| Popularity |
3.4 | 7 Votes |
What is an RNC file?
An RNC file is a compressed archive created by RNC ProPack, a file packing utility. It contains one or more files in the RNC ProPack archive format, which compresses the files into a single archive, reducing their size and making storage and distribution more efficient. RNC files can contain any type of file, including documents, images, or software, and they use ProPack’s proprietary compression algorithm to achieve smaller file sizes.
More Information
ProPack and RNC archives were commonly used in the 1980s and 1990s on DOS and early Windows systems to distribute software, backups, and collections of files over limited storage media or slow networks. Users included software developers, hobbyists, and early PC enthusiasts who needed to save disk space or bundle multiple files together for easier sharing. Because ProPack supports multiple packing formats, RNC files were just one of several options available to users for compressing their files.
NOTE: RNC is short for Rob Northern Computing.
How to open an RNC file
You can open RNC files with RNC ProPack in Windows.
Open over 400 file formats with File Viewer Plus . Free Download
Programs that open RNC files
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RNC ProPack
Free
Category: Compressed Files
Updated: December 4, 2025
RELAX NG Compact Syntax File
| Developer | N/A |
| Popularity |
3.0 | 7 Votes |
An RNC file contains code written in RELAX NG Compact Syntax, a schema language used for defining the structure and content rules of .XML documents. Unlike XML Schema ( .XSD ), RELAX NG uses a simpler and more readable syntax, making it easier to write and maintain schemas. RNC files allow developers to specify constraints for elements, attributes, and data types in XML documents, ensuring that XML data conforms to a defined structure.
More Information
RELAX NG Compact Syntax is used in web development, data interchange, and software projects that rely on XML for configuration or data representation. Users of RNC files typically include software developers, XML authors, and data architects who need to validate XML files against a schema. By defining rules in an RNC file, developers can detect errors in XML documents, enforce consistency, and facilitate automated processing.
How to open an RNC file
You can open RNC files with XML IDEs , such as SyncRO Soft oXygen XML Editor and Altova XMLSpy , which can validate XML files against an RNC schema. Plain text editors, such as Microsoft Notepad and Apple TextEdit , or any code editor that supports XML or schema syntax can also open and edit RNC files.
Programs that open or reference RNC files
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SyncRO Soft oXygen XML Editor
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Any text editor
Windows
Altova XMLSpy
Free Trial
Category: Developer Files
Updated: December 4, 2025