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How to open .DER file extension?

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

Looking for a program to open .DER files?

"Windows unable to open a file!" is probably the most common error faced by millions 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?

.DER file extension is a known file type. This section of tells you everything you need to know about this 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 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 .DER files:

Microsoft Windows:
  • Microsoft Internet Explorer
  • Mozilla Firefox
  • Mozilla Firefox
Apple Mac OS X:
  • Apple Safari
  • Mozilla Firefox
  • Apple Keychain Access