AGR File

What are AGR files and how to open them

Are you having problems opening an AGR file or are you simply curious about its contents? We're here to explain the properties of these files and provide you with software that can open or handle your AGR files.

What is an AGR file?

An .AGR file is a Grace Project file.

Grace project files are used by the Grace software, a WYSIWYG 2D plotting tool also known as xmgrace. They contain all the data, graph layouts, styling choices, annotations, and settings that define a complete plotting project. These files allow you to save your work in Grace and later reopen it to continue modifying the plot without needing to re-enter everything from scratch.

The program that creates these project files is Grace itself. When you begin a new plot, Grace starts with a default template project (often "Default.agr"), lets you import or enter datasets, change axes, formatting, colors, labels, scaling etc., and then Save to a project file. Later you can Open the saved project to restore graphs exactly as they were. These project files are editable via Grace's interface or through its scripting features.

Internally, files of this type start with the ASCII signature # Grace project file at byte offset 0. This header indicates that the file is a Grace project file.

How to open AGR files

Important: Different programs may use files with the AGR file extension for different purposes, so unless you are sure which format your AGR file is, you may need to try a few different programs.

While we have not verified the apps ourselves yet, our users have suggested three different AGR openers which you will find listed below.

Last updated: August 17, 2026

Various apps that use files with this extension

These apps are known to open certain types of AGR files. Remember, different programs may use AGR files for different purposes, so you may need to try out a few of them to be able to open your specific file.

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File.org helps thousands of users every day, and we would love to hear from you if you have additional information about AGR file formats, example files, or compatible programs. Please use the links below or email us at submit@file.org to discuss further.