The File Extensions Database

.KEYCHAIN File Extension

  • Developer by: Apple
  • Category: Data Files
  • Format: Binary

What is an .KEYCHAIN file?

.KEYCHAIN is Mac OS X Keychain File

A KEYCHAIN file is created by Apple Keychain, a program bundled with Mac OS X that stores authentication information. It contains an encrypted collection of resource authentication data, such as passwords, certificates, and private keys.

KEYCHAIN files are used to automatically authenticate users after they have checked the option to remember authentication information. They are used for websites, SSH accounts, FTP files, and wireless networks.

NOTE: KEYCHAIN files are commonly found with the name login.keychain.

Common KEYCHAIN Filenames

login.keychain - The global user keychain containing passwords, website logins, trusted identities, developer certificates, and other keys. It is located in the ~/Library/Keychains/ directory.

Programs that open Mac OS X Keychain File
Apple Keychain Access

How to solve problems with KEYCHAIN files

  • Associate the KEYCHAIN file extension with the correct application. On :
    Windows: Right click on any KEYCHAIN file and then click "Open with" > "Choose another app". Now select another program and check the box "Always use this app to open *.KEYCHAIN files". Mac: Right click (or Ctrl-click) the KEYCHAIN file, then click "Open with" > "Other...". Then choose another program and check the "Always Open With" box. Linux: Right click on the file, and select "Open with" and choose another program. iPhone: Tap the file. If you do not see an app to open the file, then tap Share "Share" and choose an app. Alternatively, save the file. Then open the Files app Files app. There long-press on the file, then release your finger. You will see a black menu bar. Then tap "Share" and select an app. Android: Tap the Settings icon on your smartphone, then tap on the Apps section. There tap the Options icon in the top right-hand corner of the screen to change the default apps.
  • Update your software that should actually open .KEYCHAIN is Mac OS X Keychain File. Because only the current version supports the latest KEYCHAIN file format. Search, therefore, e.g. on the Apple manufacturer website after an available .KEYCHAIN is Mac OS X Keychain File update.
  • To make sure that your KEYCHAIN file is not corrupted or virus-infected, get the file again and scan it with antivirus software.