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Navigation: Home > OP4 file

Informations about the OP4 filename extension and the file formats associated with it

We collected the information you should know about the .op4 filename on this page. If you were sent a(n) .op4 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

.op2 - Nastran Binary Results

The OP2 file is a Data file, which is connected to the Nastran Binary Results according to our registry. With the adequate settings, the Nastran Binary Results (.op2) files can be opened or converted with the help of MSC Nastran.

Format description:
OP2 format
MSC Nastran
Magic string:
- / -
Related links:
Related extensions:
Nastran Log
Nastran ASCII Results
Nastran Input File
Nastran Binary Results

Important! Programs other than the ones listed above may also use the .op4 file extension. Even harmful programs can create files with the .op4 extension to store data in them. Always be careful with .op4 files coming from unknown sources. Don’t open executable files that arrived in mails, even if you know the sender.

The .op4 file can’t be opened on your computer?

If the program necessary for opening the .op4 file is installed properly on your computer, then the quickest and simplest way to open the .op4 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 .op4 file, you may receive an error message from the associated application, this can be caused by the following:

Incorrectly given .op4 extension

The .op4 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 .op4 files.

op, pp4, opr, opt

Maybe you’re not even looking for the .op4 file extension?

It’s possible the the file’s extension was given incorrectly. Below, we list some filename extensions that are similar to the .op4 extension. It’s possible that the one you’re looking for is among them.

Origin Preprocessed File
OPRO Print Report
Microsoft Visual Studio Workspace Options
ProWorx NXT List Module Option File
Concordance Native Viewer Database

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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