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Details of the .op4 file extension

The table below provides useful information about the .op4 file extension. It answers questions such as:

  • What is the .op4 file?
  • What program do I need to open a .op4 file?
  • How can the .op4 file be opened, edited or printed?
  • Where can I find the specifications for .op4?
  • Which MIME-type is associated with the .op4 extension?
  • How can I convert .op4 files to another format?
  • What are other, similar filename extensions to .op4?

We hope you find this page helpful and a valuable resource!

0 extension(s) and 1 alias(es) found in database

.op2 file extension details

Nastran Binary Results

Nastran Binary Results .op2 file icon
OP2 file is a Nastran Binary Results (OUTPUT2). MSC Nastran is a powerful, highly flexible analysis and optimisation finite-element program on an open architecture for analysing stress, vibration, and heat transfer characteristics of structures and mechanical components.
Category: Data files
Application: MSC Nastran
Mime-type: application/octet-stream
Magic number: -
Magic string: -
Sample: -
OP2 aliases:
OP2 related links:
OP2 related extensions:
Nastran ASCII Results

Nastran Log

Nastran Input File

Other types of files may also use the .op4 file extension.

.op4 file extension error

The .op4 file extension is often given incorrectly!

According to the searches on our site, these misspellings were the most common in the past year:

opt, op, pp4, opr

Is it possible that the filename extension is misspelled?

We found the following similar file extensions in our database:

Microsoft Visual Studio Workspace Options
ProWorx NXT List Module Option File
Concordance Native Viewer Database
Origin Preprocessed File
OPRO Print Report
Micrografx Picture Publisher 4.0 Image
open .op4 file

Can't open a .op4 file?

When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:

Windows cannot open this file:


To open this file, Windows needs to know what program you want to use to open it...

If you don't know how to set the .op4 file association, check the FAQ.

.op4 file extension

Can I change the extension of files?

Changing the filename extension of a file is not a good idea. When you change a file's extension, you change the way programs on your computer read the file. The problem is, changing the file extension does not change the file format.

If you have helpful information about the .op4 file extension, write to us!

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