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Basic information about OAS file

When there is a problem with opening files with the file extension OAS（*.OAS or *.oas）, you do not need a computer expert. In most cases, using the helpful suggestions of experts contained in our website as well as appropriate programs, you can solve the problem with the OAS file yourself.

There are 1 file types using the OAS file extension in our database. In the further part of this page, you will find detail information about all the OAS file with their brief description and a list of programs that support OAS file sorted by operating systems. The table below provides useful information about the OAS file extension. It answers questions such as:
  • What is the OAS file?
  • How to open a OAS file?
  • What programs do I need to open a OAS file?
  • What programs help to create and edit a OAS file?
  • How to convert OAS files to another file format?
  • How to convert another files to OAS file format?


1.Detail information about OAS file extension: Microsoft Outlook Attachment Sniffer

File type Microsoft Outlook Attachment Sniffer Category Misc Files
Developer rsbr Software File format N/A
Description OAS file is a Microsoft Outlook Attachment Sniffer developed by rsbr Software. OAS is a file extension commonly associated with Microsoft Outlook Attachment Sniffer files. Microsoft Outlook Attachment Sniffer format was developed by rsbr Software. OAS file format is compatible with software that can be installed on Windows system platform. OAS file format, along with 3591 other file formats, belongs to the Various Files category. The most popular program for handling OAS files is Microsoft Outlook, but users can choose among 1 different programs that support this file format. Microsoft Outlook software was developed by Microsoft Corporation, and on its official website you may find more information about OAS files or the Microsoft Outlook software program.
Software programs that will open, edit or convert OAS files

Windows		 Microsoft Outlook
Outlook Attachment Sniffer



Can't open a OAS file?

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

”Can't open this file: example.OAS”。

To open this file, you install one of the applications from the list of software programs that you found here, you should be able to open, edit or convert the file with the OAS extension without any issue.


Where I can download the application that support OAS file?

If you do not know where you can download the application from our list, click on the link (which is the name of the program), you will find more information there on the location where to download the required application. Most often they are the websites of software manufacturers.


How to change file associations?

  • Right-click a file with the extension whose association you want to change, and then click "Open With".
  • In the "Open With" dialog box, click the program whith which you want the file to open, or click "Browse" to locate the program that you want.
  • Select the ”Always use the selected program to open this kind of file” check box.


Can I change the extension of OAS 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/open the file. The problem is, changing the file extension does not change the file format. Select a software program from our list and install it on your computer. If the file has not opened correctly, you have to look for a different software program from our list. Sometimes you have to repeat the operation several times.


What else may cause problems width open a OAS file?

The reasons for the lack of the ability to open a OAS file on your computer may be at least several. The easiest thing is to find a suitable application installed on your computer, which will open a OAS file. If there is still something wrong, you might want to check:

  • Whether the OAS file is damaged.
  • Whether the OAS file is incorrectly linked in the registry entries.
  • Whether the OAS file extension has been accidentally removed from the Windows registry.
  • Whether the installation of an application that supports the OAS file format is incompletely.
  • Whether the OAS file is infected.
  • Whether the drivers of the equipment used for opening a OAS file are up to date.
  • Whether your computer has enough hardware resources to open a OAS file.

If the OAS file still not working with your software after eliminating the above shortcomings? That means that the problem is more complex and requires the help of a specialist.