Opening a GR File

The GR file type is primarily associated with Various specialized apps.

GRFile Extension GR
 File extension: GR
File type:  data file

What is a GR file?

GR files mostly belong to Various specialized apps. GR files are not a single, standard format but a label used by several specialized applications to store very different kinds of data.
Consider these examples:
  • BoardView files – they hold board layout or circuit design data.
  • Road network graphs – these contain network or route data used in graph‐based analysis. For more details, see the DIMACS Challenge web page.
  • Graph description language files – they store text‐based instructions to render graphs. More on this can be found at the Graphviz documentation.
  • Graphmatica graph files – these work with graphing calculator tools. Visit the Graphmatica website for details.
  • Graph instance files – used in specific graph problem instances.
  • MHTML Greek web page files – these are saved web pages (in MHTML format) used by browsers like Chrome (Blink engine) for Greek bookmarks.
  • Brazilian FGTS files – they store tax payment records, a format associated with Brazilian FGTS procedures. More details are available on the official government page.
  • TV recording / GridRecognizer data files – used by GRViewer to record grid data.
  • HVAC graphic files – these contain graphics for HVAC systems, as used in Niagara AX environments (Niagara AX).
  • Vectric Cut2D project or Eagle CAD layout files – project files for design and cutting applications found in software like VCarve Pro (Vectric).
  • Occasionally, PDF or subtitle/gridded data files have also been noted with the GR extension.
    • FilExt.com tip: To view a GR file, it is important to know which application created it. Sometimes a simple text editor can reveal hints in the file’s header, but often a dedicated viewer or editor is needed.

    How to open GR files

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

    Online GR Text Viewer

    Choose your .gr file to analyze
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    Programs that open and convert GR files:

    1. Various specialized apps
      See the previous paragraphs to learn more about the main application. GR files are often referred to as Various specialized apps data files because this type of file is primarily created or used by this software.
    2. XGMML (eXtensible Graph Markup and Modeling Language) File

    GR file format:

    To view or edit GR files you need to know the file format, because it determines how the data in this file is stored. The first characters in a file identify the file format, for example, HTML files start with the bytes <html>. Frequently, however, one file extension is used by different programs for different file formats, and one file format for different file extensions. So a detailed analysis of a file is vital in order to determine the format and the associated program. Our examination of the GR files comes to the following conclusion:

    The GR file extension is quite common and includes different formats for different programs. The file formats most commonly found in GR files are:

    All the rest of the GR files (65%) have different formats, the following 22 formats exist: Graphmatica Graph, MHTML, XML, PDF, JFIF, GIF, GZIP, SECTION, FGTS, vepi, DEFAULT, SUB, graph and COMPONENT. Sometimes used for exact, selek, graph, husk, grrfocr or rmat. You can get all the details of your GR file by dragging it onto this page or by clicking the button "Choose your .gr file to analyze" above.

    Technical Data for GR File Extension

    File classification:
    Data
    Related files:
    brd, dot, gexf, mhtml, sub, gz, co, gr_, gr5, zip, jgf, cdp, jpg, gr2, rar, txt, pdf, exe, out, xml, dat, qvm, npy, dxf

    The following listing is compiled from the database produced by the 'Associate This!' program, selected data from the main FILExt database and file extension information submitted by users.

    ProgramID: Viewer
    EXEFile: %ProgramFiles%\Classic PhoneTools\viewer.exe %1
    ProgramID: Viewer
    EXEFile: %ProgramFiles%\mobile PhoneTools\viewer.exe %1
    ProgramID: Graphmatica
    EXEFile: %ProgramFiles%\Graphmatica\Graphmatica.exe %1
    ProgramID: grfile
    EXEFile: %ProgramFiles%\plop\gui_plop.exe
    Show all 4 listingsTo Top

    a gr data file is a special file format and should only be edited and saved with the appropriate software.

    How to solve problems with GR files

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