How to open a file with .DER extension?

File Type : DER Encoded X509 Certificate
Compatible with (Win10, Win8, Win7, Vista and WinXP)

You'll need a new app to open this .DER file

Searching for the right program to open .DER files?

"You'll need a new app to open this file" is probably the most common error faced by millions of Windows users every day. This is either because the program required to open a file is not available on your system or there may be other issues.

We recommend that you run a free scan to check for missing drivers.


What is .DER file extension?

Digital certificate file created in the Distinguished Encoding Rules (DER) format; contains a binary representation of the certificate; commonly used for storing X.509 certificates in public cryptography. All standard Web browsers recognize digital certificates provided by secure websites.
You can see a list of software programs here on easyfileopener.org that can open this file type so that you don’t need to search for it on the web. You can then open your file with this extension using a software listed below.

Software that can be used to open DERfiles:

  • Microsoft Internet Explorer
  • Mozilla Firefox
  • Apple Safari
  • Mozilla Firefox
  • Apple Keychain Access
  • Mozilla Firefox