File Extension CRT

.CRT File

File extension: CRT
File type: Certificate File

Notes about the CRT file extension:

To open this file type, a required software must be installed. Without it you only see a Windows message "The following file cannot be opened" (Windows 7) or "How do you want to open this file?" (Windows 10) if you double-click the file. There click on "More apps" and choose a suitable software to view such files on your PC or from email attachments.

The CRT file type is primarily associated with 'GlobalSign'.

This file is a certificate in PEM format. It can be used with many different programs and devices that use certificates.

Two common examples are in the associated links.

Detailed information for file extension CRT:

Primary association: GlobalSign
Mime type: application/x-x509-ca-cert, application/pkix-cert, application/keychain_access
Identifying characters Hex: 42 61 67 20 41 74 74 72 69 62 75 74 65 73 0A , ASCII: Bag Attributes
Program ID: CERFile , certificatefile
Related links: Apache: Install SSL, Cisco ASA: Install SSL

Other applications associated with file type CRT:

  • C64 (Cartridge Image), An image of a Commodore 64 ROM. , , These files are used with various C64 emulators.
  • Oracle Terminal Settings Info
  • Soft Concert (Karaoke File)
  • UNIX Crontab FileNot a required extension for Crontab.
  • X.509v3 (Security Certificate) The identifying characters used for this association are - Hex: 43 65 72 74 69 66 69 63 61 74 65 3A , ASCII: Certificate:
File Identifier - TrID
'Identifying characters' used on are
provided by Marco Pontello from his TrID database

To change file associations press Windows Key + X and then Apps and Features > Default apps > Choose default apps by file type. Invalid file associations could be the result of underlying issues within your Windows PC.

Technical data

To view technical data on file-extension CRT click this link to expand/hide the additional area.

System Info for File Extension .CRT

The following listing is compiled from the database produced by the 'Associate This!' program, selected data from the main FILExt database and information FILExt collected directly from user systems.

ProgramID: CERFile, FileType: Security Certificate, AppName: Crypto Shell Extensions
EXEFile: cryptext.dll

ProgramID: certificatefile, FileType: Internet Security Certificate, AppName: Internet Control Panel

ProgramID: CERFile
EXEFile: %SystemRoot%\system32\rundll32.exe cryptext.dll,CryptExtOpenCER %1

ProgramID: CERFile
EXEFile: rundll32.exe cryptext.dll,CryptExtOpenCER %1

ProgramID: CERFile
EXEFile: rundll32.exe %SystemRoot%\ServicePackFiles\i386\cryptext.dll,CryptExtOpenCER %1

ProgramID: MapRouteFile
EXEFile: %ProgramFiles%\AUTOAT~1\Mapa.exe

ProgramID: MapRouteFile
EXEFile: %ProgramFiles%\Cartall\Autoatlas Polski\MAPA.EXE

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