Filename Extensions
If you are seeking information about file extensions, then you are in the right place at right time.

Details of extension .crt

1 extension(s) and 0 alias(es) in our database

Below, you can find answers to the following questions:

  • What is the .crt file?
  • Which program can create the .crt file?
  • Where can you find a description of the .crt format?
  • What can convert .crt files to a different format?
  • Which MIME-type is associated with the .crt extension?
Certificate File .crt file icon

Certificate File

The .CRT file contains the certificate, including the identity information, public key, expiry date, and signature.
Detailed description not available
Category: Other files
Application: OpenSSL
Program name: -
Mime-type: application/x-x509-ca-cert
Magic bytes (HEX): -
Magic string (ASCII): -
Related extensions:
Key Database File
PKCS #12 Data File
Certificate Signing Request
PEM Encoded Certificate File
Certificate Revocation List
PKCS #7 Encrypted Message
Microsoft Serialized Certificate Store
PKCS7 Signature

Other types of files may also use the .crt file extension. If you have helpful information about .crt extension, write to us!

Is it possible that the filename extension is misspelled?

We found the following similar extensions in our database:

Cgatools CRR File
BrainVoyager QX Contrast Data
CorelDraw Template
Revolution Single-spectrum Xraytor Data
MOUSE Runoff Data
VS Resource Script Template
SmartCAM Code Generation Template
ProWorx NXT Temporary Long Comment Data
CryENGINE Map Data

The .crt filename extension is often given incorrectly!

According to the searches on our site, these misspellings were the most common in the past year:

crr (15), ctr (12), srt (1), cdt (1), rct (1), drt (1), cry (1), crh (1), crf (1), cgt (1), vrt (1), cet (1), rt (1), frt (1), ctt (1)

Can't open a .crt file?

If you want to open a .crt file on your computer, you just need to have the appropriate program installed. If the .crt association isn't set correctly, you may receive the following error message:

Windows can't open this file:

File: example.crt

To open this file, Windows needs to know what program you want to use to open it. Windows can go online to look it up automatically, or you can manually select from a list of programs that are installed on your computer.

To change file associations:

  • Right-click a file with the extension whose association you want to change, and then click Open With.
  • In the Open With dialog box, click the program whith which you want the file to open, or click Browse to locate the program that you want.
  • Select the Always use the selected program to open this kind of file check box.

Supported operating systems

Windows Server 2003/2008/2012/2016, Windows 7, Windows 8, Windows 10, Linux, FreeBSD, NetBSD, OpenBSD, Mac OS X, iOS, Android

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