What is a GDF file?
A .GDF file can serve several different purposes depending on the software that created it. The two most common uses are the General Data Format for biomedical signals and the Graph Data Format used by network analysis software. For example, graph visualization tools like Gephi use .GDF files to store node and edge data. Another specialized use is the GUESS Graph Data Format File used by the GUESS exploratory data analysis and visualization tool.
Other software programs also use the .GDF extension. It can act as a Game Definition File for Microsoft Games for Windows, an HMI graphical display file for ICONICS GraphWorX32, a gravity field model grid for scientific research, or a well log data file for GeoGraphix. Because the .GDF extension has multiple possible meanings, we recommend using viewer.online/gdf to identify the actual format of your file.
How to open GDF files?
You must use the specific software that matches your file type. If the file is a graph dataset, you can open it with Gephi or GUESS. If it is a biomedical signal file, you need scientific analysis software that supports the General Data Format standard.
If you do not know the origin of your .GDF file, viewer.online/gdf can analyze .GDF files to identify the exact format and creator software, inspect the file structure, extract readable text, and check whether an online preview is available.
Best practices and troubleshooting
Never rename a .GDF file extension to force it to open in an incompatible program. This will not change the underlying data and may corrupt the file. If your default program cannot open the file, use a text editor like Notepad++ to inspect the file header. If the file contains plain text, you can often read the column names or graph definitions. If the file is binary, it is likely a graphical display file, a game file, or a proprietary dataset.
Conversion and Software Tools
If you need to share your .GDF data with other applications, you might need to convert it. We recommend file conversion to sensible target formats on convert.guru. For example, graph data can often be converted to .CSV, .JSON, or .GRAPHML. Biomedical data might need conversion to .EDF.
Summary
A .GDF file typically stores graph networks or biomedical data, but many different programs use this extension. This is why viewer.online/gdf is useful for identifying, inspecting, and understanding .GDF files without installing software or dealing with compatibility problems.