Opening a FEF File

The FEF file type is primarily associated with Fujifilm FinePix Viewer / FocusOnCrypt.

FEF	File extension: FEF
	File type:	encoded file

What is a FEF file?

FEF files mostly belong to Fujifilm FinePix Viewer / FocusOnCrypt. An FEF file can serve different roles, based on its origin.

Video Data: It may hold an encrypted video fragment that is part of a secure, encoded video. Such files require specialized decryption software like that from FocusOnCrypt.

Image Data: In some cases, an FEF file stores a raw image from Fujifilm cameras. These files use the TIFF format internally and are handled with applications such as Fujifilm FinePix Viewer. Additional details can be found on the Fujifilm website.

Scientific Data: Other FEF files carry electrophysiology measurements. They are produced by systems like CardioLab and are used to record and analyze heart-related signals.

FilExt.com tip: Use file metadata or the source information to decide which application is right for your file.

How do you open FEF files?

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

Online FEF Text Viewer

Choose your .fef file to analyze

or drag and drop it here

Online File Viewer

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FEF file extension format:

If you know the file format, you can also find out how to open or edit the file. The file format can be deduced from the file extension and the signature. If the file extension does not match the file format, double-clicking on the file will cause an error upon opening. Exact knowledge of the format is therefore important in order to solve problems occurring in files. Below you will find our evaluation of the FEF files:

The FEF file extension is not widely used. Such a file includes different formats for different programs. The file formats most commonly found in FEF files are:

• 60% of all FEF files start with the bytes FEF, which are crucial for this file format. These files contain neither text nor words, but only data. The files are often between 70 MB and 120 MB in size. The file type was created recently. The following keywords are characteristic: CREATED_BY, FocusOnCrypt 1.0 and fef:mft. Such FEF files store data about watermark, fans, only, myfans, next, nsps, reducing, inkyung, mosaic, webrip, girl, nfan and movies.
• 10% of all FEF files internally utilize the TIFF file format. TIFF is short for Tagged Image File Format. It stores raster graphics images that support color depths from 1 to 24-bit, lossy and lossless compression and multiple layers and pages. They consist of illegible, cryptic characters. The files are often between 11 MB and 12 MB in size.

All other FEF files (30%) have no uniform format, the following 4 formats can be found: ZIP and CEN. You can get all the details of your FEF file by dragging it onto this page or by clicking the button "Choose your .fef file to analyze" above.