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FID File

What are FID files and how to open them

Are you having problems opening a FID 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 FID files.

What is a FID file?

FID files have multiple uses, and Windows Indexing Service Index is one of them. Read more about the other uses further down the page.

Windows Indexing Service Index File

Files that contain the .fid file extension are most commonly associated with the Microsoft Windows Indexing Service. These FID files contain index files that the Windows indexing utility has created. The indexes contained in these files help the operating system perform search functions more efficiently.

How to open FID files

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

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

Last updated: July 31, 2023

All known file formats using extension .FID

While Windows Indexing Service Index File is a popular type of FID-file, we know of 3 different uses of the .FID file extension. Different software may use files with the same extension for different types of data.

Acorn NMR NUTs Format Spectra Data File

We know that one FID format is Acorn NMR NUTs Format Spectra Data File. We have not yet analyzed in detail what these files contain and what they are used for. We're working on it.

Felix Format Spectra Data File

Felix is the industry standard software program for off-line data processing, spectral visualization, and analysis of high resolution, one- to four-dimensional, homonuclear and heteronuclear NMR data.

FID opener for Windows

We have identified one FID opener that is compatible with this specific type of FID file.


Various apps that use files with this extension

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

GOM PlayerGOM PlayerUser submitted
KMPlayerKMPlayerUser submitted
RealPlayerRealPlayerUser submitted
WUFI AnimationWUFI AnimationUser submitted
flexAnalysisflexAnalysisUser submitted

Help us help others

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