What is the PRNX file format?
.prnx files are associated with the XtraReports component included in the DevExpress suite. XtraReports is used by .NET software developers to design, preview, and distribute reports within Windows desktop and web applications.
Files with a .prnx extension store rendered report documents - a snapshot of a fully processed report ready for viewing or printing. At the binary level, a .prnx file is a ZIP archive (identifiable by the PK magic bytes 50 4B 03 04 at offset 0) that packages XML-formatted page content together with any embedded images or resources.
The format is generated and consumed by DevExpress's Document Viewer component. It is typically produced from report layouts stored as .repx files. The DevExpress suite supports projects built in environments including:
- Visual Studio (C# and VB.NET)
- Delphi (VCL and FireMonkey)
- ASP.NET WebForms and HTML5/JavaScript-based web viewers
.prnx documents can be exported from the Document Viewer to formats such as PDF or RTF. The files are not meant to be opened by double-clicking; they require the DevExpress Document Viewer or a compatible application to render their contents correctly.
Security & safety
RISK: LOWA PRNX is inert report data (zipped XML + images), not executable, so the file itself is harmless. The practical pitfall is that no consumer app opens it: avoid downloading sketchy "PRNX viewer/opener" tools from ad portals - there isn't a legitimate standalone one. The supported route is the DevExpress application that made it, or asking the sender to re-export as PDF/Excel.
Format details
in a nutshellPrograms that open PRNX files
Windows2 apps
7-Zip
Open-source Right-click > 7-Zip > Open archive to inspect the inner XML/images - for investigation only; it does not render the report. 
DevExpress Document Viewer (XtraReports)
Paid Open the .prnx in a DevExpress-based application's Document Viewer (the program that created it, or a custom WinForms/WPF viewer). It is the only native opener. Technical details
deep spec| Container format | ZIP archive; first 4 bytes are `50 4B 03 04` (`PK` magic bytes) at offset 0 |
| Internal encoding | UTF-8 XML describing pre-rendered page layout and document metadata |
| MIME type | `application/octet-stream` |
| Developer | Developer Express Inc. (DevExpress) |
| Generating component | XtraReports / PrintingSystem Document Viewer (.NET Reporting suite) |
| Source layout format | `.repx` (editable report layout); `.prnx` holds the rendered, print-ready snapshot |
| Platform support | .NET (WinForms, WPF, ASP.NET WebForms, ASP.NET Core, Blazor, WinUI 3, MAUI) |
| Embedded resources | Images and other assets are bundled as additional ZIP entries inside the container |
| Content model | Fixed-layout, page-oriented; each page stored as fully processed XML |
| Export capabilities | Document Viewer can export to PDF, RTF, XLSX, DOCX, HTML, CSV, and image formats |
| Language environments | Created from projects written in C#, VB.NET, and Delphi |
| Not directly editable | Represents a rendered snapshot; design changes require editing the source `.repx` layout |
| Inspection | Archive tools such as 7-Zip can unpack the file to access raw XML and embedded resources |
| Released | 2000s (DevExpress XtraReports / .NET Reporting suite) |
| Specification | docs.devexpress.com |
PRNX conversions
Community Q&A
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