File Extension Library


.3IN File Extension

  • Developer by: Microsoft Corporation
  • Category: Various data Files

What is an .3IN file?

.3IN file extension is created by Microsoft Corporation. .3IN has been classified as Various data Files.

.3IN is MSN setup information data

The 3in file extension is associated with the MSN Explorer, an internet browser for Microsoft Windows operating system.

The 3in file stores setup information data.

No further information could be found.

.3IN file format is deprecated and this file format is no longer supported.

Currently, .3IN file type is not actively used and is obsolete. This usually happens with system files in older operating systems, files from long-discontinued software, or with previous versions of some file types (documents, projects, images, etc.) that were replaced in later versions of the original programs.


How to open:

Probably not meant to be accessed by the user.

How to convert:

Probably cannot be exported to other formats.

How to Open .3IN file on different platforms

Open .3IN File on Windows

  • Right-click a .3IN
  • Left-click "Open With" > "Choose another app"
  • Select the program that opens .3IN file and Select check box "Always use this app to open .3IN files" Press "Ok"

Open .3IN File on Mac

  • Right-click (or Ctrl + Left-click) the .3IN file
  • Click "Open With" > "Other.."
  • Then choose another program from the app list and press "Open"
  • Select check box "Turn on" for "Always open in app"

Open .3IN File on Linux

Right click on the .3IN file, choose "Open with" and select a program from the list above

Open .3IN File on iPhone

Select a file. If you don't see an application to open the .3IN file, tap "Share" and choose the right app.
Method 2
Save the file. Then open the app «Files». Touch and hold the file, then release your finger. You will see a black menu bar. After that tap "Share" and select an application.

Open .3IN File on Android

Tap the Settings icon on an Android smartphone, then select «Applications». Click the Settings icon in the upper right corner of the screen, to change the default apps.
If you want to open, edit, save or even convert .3IN files on Android, then your best bet is to download one of the dedicated apps available on Google Play.

How to fix problems with .3IN files

  1. You need to update the application that you normally use to open .3IN files. Only the latest version of the software supports the current .3IN file format
  2. You need to check the .3IN file for viruses. To do this, you need to scan it with a popular antivirus (Norton, Nod32, Kaspersky, Dr.Web, etc.)