Opening EEG Files

The EEG file type is primarily associated with EEG Analysis Software.

EEG	File extension: EEG
	File type:	data file

What is an EEG file?

EEG files mostly belong to EEG Analysis Software. EEG files store data from electroencephalograph tests. They record brain electrical activity for clinical and research use.
Key details provided by FilExt.com:

Content: Contains raw EEG signals capturing brain electrical patterns.

Structure: May use proprietary formats; some files are built on a Microsoft Compound format.

Usage: Designed for specialized EEG analysis software from companies such as Persyst, NeuroGuide, EEG-1100A, and NeuroWorks.

Application: Employed in studies and diagnosis to review brain function.

For more details, visit PhysioNet, Applied Neuroscience, or check the NeuroWorks page.
FilExt.com tip: Use the correct EEG analysis tools to open and review these files accurately.

How to open an EEG file

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

Online EEG Text Viewer

Choose your .eeg file to analyze

or drag and drop it here

Online File Viewer

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EEG file format:

If you can determine the file format, the associated program can also be determined. The file format can be deduced from the file extension and the signature. Nonetheless, different programs can utilize the same file extension to represent distinct file formats. Double-clicking on the file often results in an error when opening. If there are problems opening a file, you must first determine the file format used. In the following you will find our evaluation of the EEG files:

Files with the EEG extension are quite widely used. This file type is used by a few programs, each with its own file format. However, the following two file formats are common:

• 20% of all EEG files start with the bytes 90 07 0B CA 95 D7 D0 11 AF 32, which are crucial for this file format. The content consists of readable text data, which can be read using a text editor. Most of these files are 170 KB to 270 KB in size. It is a modern file type. These files are often associated with xxxxxx, and have person-related content.
• 8% of all EEG files are based on the Microsoft Compound File format, also known as Composite Document File format or OLE2 compound document format. Compound document files are used to structure the contents of a document in the file. It is possible to divide the data into several streams, and to store these streams in different places in the file. In this way compound document files support a complete file system inside the file, the streams are like files in a real file system, and the sections are like subdirectories. Compound files begin always with signature bytes D0 CF 11 E0 A1 B1 1A E1 (ÐÏࡱá). The data in this file is stored in streams whose names are EEG, User Recording Actions, PlugIns Private Data, DocumentSummaryInformation, Public, DC, Impedances, GPS Data and Printed Fragments Data. The files are 2 MB to 86 MB in size, with a median of 51 MB. The following filename is common: eeg-video.eeg or - - - 01-06-2020 10 30 (GMT-3).eeg. These files are often associated with video.

The remaining 72% of all EEG files are different files with different signatures, such as RIFF, EEG and COHERENCE. Sometimes used for task, session, control, rest, presurgery, ictal or ieeg. Just click the "Choose your .eeg file to analyze" button on this page to find out what your EEG file is.