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Navigation: Home > 999 file

Informations about the 999 filename extension and the file formats associated with it

We collected the information you should know about the .999 filename on this page. If you were sent a(n) .999 file in an e-mail, but you don’t know what to do with it, then you can find help here. We strive to suggest free, open-source applications that are available to everyone for the file formats.

1 filename extension(s) are in our database

.999 - Multipass Security Data

The 999 file is a Data file, which is connected to the Multipass Security Data according to our registry. With the adequate settings, the Multipass Security Data (.999) files can be opened or converted with the help of Multipass.

Format description:
999 format description not yet available
Category:
Data
Application:
Multipass
Mime-type:
application/octet-stream
Magic string:
- / -
Aliases:
-
Related links:
-
Related extensions:
.lse
Oracle Utilities Load Analysis Input
.jrm
IBM Tivoli Resource Model Builder Data
.gcf
GameExchange2 Camera Data
.vdv
PTV VISSIM Acceleration Record
.mvf
Autodesk AutoFlix Animation Data
.nnl
Network Notepad Professional License

Important! Programs other than the ones listed above may also use the .999 file extension. Even harmful programs can create files with the .999 extension to store data in them. Always be careful with .999 files coming from unknown sources. Don’t open executable files that arrived in mails, even if you know the sender.

The .999 file can’t be opened on your computer?

If the program necessary for opening the .999 file is installed properly on your computer, then the quickest and simplest way to open the .999 file is to double-click on the file’s name. If that doesn’t work, then the right software probably isn’t installed on your computer.

While opening the .999 file, you may receive an error message from the associated application, this can be caused by the following:

Incorrectly given .999 extension

The .999 filename extension can be given incorrectly sometimes. The cause of the error could be a mistake or a simple typo. We found the following incorrectly given filename extensions that are the most frequent in the case of .999 files.

99

Maybe you’re not even looking for the .999 file extension?

It’s possible the the file’s extension was given incorrectly. Below, we list some filename extensions that are similar to the .999 extension. It’s possible that the one you’re looking for is among them.

.p99
MicroStation Modification Project Resource File

Associated applications

The Windows operating system stores information about the applications associated to the file extensions in the registry database. The associations can be queried or modified in the Command Prompt window with the "assoc" command.

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We gladly accept application suggestions, but our primary goal is to suggest reliable, open-source applications that can be freely distributed to the users.

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