All about GRR Files

The GRR file type is primarily associated with Gradekeeper.

GRR	File extension: GRR
	File type:	Class Roster

What is a GRR file

GRR files mostly belong to Gradekeeper by Daniel Ethier. Gradekeeper is a computerized gradebook. You enter grades and attendance and Gradekeeper does the rest: computes grades, prints reports, does seating charts, and even posts grades on-line. With the companion applications for your Palm OS or Pocket PC handheld, you can record grades and attendance during class and synchronize with your desktop computer later.

How can I open a GRR file?

You need a suitable software like Gradekeeper to open a GRR file. You need a suitable software like Gradekeeper from Daniel Ethier to open a GRR 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 GRR file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a GRR file directly in the browser:. Just drag the file onto this browser window and drop it.

Online GRR Text Viewer

Choose your .grr file to analyze

or drag and drop it here

Online File Viewer

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

GRR files can originate from different programs and aren't universally openable.

Identify the Source: If received from a teacher, it is likely a Class Roster. If from an IT team, it may be incident response data.
Check the Header: Open the file in a text editor or hex viewer to inspect the first bytes:
- Readable XML/JSON suggests exported data.
- "PK" indicates a ZIP-based archive.
- Unreadable binary means a proprietary format.
Use the Original Software: The original program is usually required; try Gradekeeper (by Daniel Ethier) or ask the sender if uncertain.
Use this Webpage: Drag and drop your file into our viewer to detect the format, extract readable text or metadata, and preview when possible.

Technical Data for GRR File Extension

Related files:

grk, ros, rbo

a grr Class Roster is a special file format by Daniel Ethier and should only be edited and saved with the appropriate software.

How to solve problems with GRR files

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