Opening an RDEF File

The RDEF file type is primarily associated with Geoworks.

RDEF	File extension: RDEF
	File type:	UI Resource File

What is an RDEF file?

RDEF files mostly belong to Geoworks. Old format.

How to open an RDEF file

You need a suitable software like Geoworks to open an RDEF file. You need a suitable software like Geoworks to open an RDEF file. Without proper software you will receive a Windows message "How do you want to open this file?" or "Windows cannot open this file" or a similar Mac/iPhone/Android alert. If you cannot open your RDEF file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a RDEF file directly in the browser:. Just drag the file onto this browser window and drop it.

Online RDEF Text Viewer

Choose your .rdef file to view

or drag and drop it here

Online File Viewer

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How to extract texts from RDEF files or capture a screenshot to PDF, JPG, DOCX, TXT, ...

You can extract texts from RDEF file or capture a preview screenshot using our online RDEF file viewer:

To do so, click the "Choose your .rdef file to view" button above.
After your file is opened in browser,
click "Save as..." in the menu.
Then choose the file format (e.g. JPG, PDF, DOCX, TXT, ...) you want.
Download the converted file.

.RDEF File Won't Open? Here is What You Can Do

Because .RDEF files can originate from different programs, they aren't universally openable.

Identify the Source: If received from a retro computing enthusiast, it may be a Geoworks UI Resource File. If from a Haiku OS developer, it is likely a Resource Definition script.
Check the Header: Open the file in a text or hex editor to inspect the first few bytes.
- Readable C-like syntax implies a Haiku/BeOS text-based resource script.
- Unreadable binary data suggests a compiled Geoworks UI file.
Use the Original Software: Opening the file usually requires the original program, such as Geoworks Ensemble, Haiku OS SDK, or a compatible text editor; if uncertain, ask the sender.
Use this Webpage: Drag and drop the file into our viewer above to detect its format, extract metadata, and preview contents.

Technical Data for RDEF File Extension

Related files:

jpg, out, txt, grdef, gp, dh

an rdef UI Resource File is a special file format and should only be edited and saved with the appropriate software.

How to solve problems with RDEF files

Associate the RDEF file extension with the correct application.
Update your software that should actually open ui resource files. Because only the current version supports the latest RDEF file format. Search, therefore, e.g. on the manufacturer website after an available Geoworks update.
To make sure that your RDEF file is not corrupted or virus-infected, get the file again and scan it with Google's virustotal.com.
Click here to open your .RDEF file online - secure, fast, and no downloads needed.