What Is A. Cer File?
What is a CER file? A file with an extension .cer is responsible for storing some information about the owner certificate and the specific public key. This format of files cannot store the private keys and have the capacity to store only one certificate which is x509.

What is a CER file used for?

A . cer file only has the public key (this is what you typically exchange with integration partners); it can be used to verify tokens or client authentication requests, and it is what is received by an HTTP client from a server in the SSL handshake.

How do I open CER files?

On Windows systems you can right click the . cer file and select Open.
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  1. In Internet Explorer, click Tools, then click Internet Options to display the Internet Options dialog box.
  2. Click the Content tab.
  3. Under Certificates, click Certificates. To view details of any certificate, select the certificate and click View.
Maya Lin-Takahashi

Maya Lin-Takahashi

Consumer Tech & Gadget Reviewer

Maya is a hardware enthusiast who tests and reviews smart home devices, smartphones, wearables, and audio gear. She focuses on practical consumer value and build quality.

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