File extension CRT
| File type | Internet Security Certificate |
| Developer | N/A |
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What is a CRT file?
Files with the .CRT extension contain certificates of secure websites - available in the HTTPS protocol. Certificates are used to confirm the authenticity of the site, and are distributed by companies that create and authorize certificates, such as Verisign and Thawte.
Browsers automatically verify certificates. The user can obtain the information contained in the certificate by clicking on the lock icon next to the website address.
Program(s) that can open the .CRT file
Mac OS
Linux
How to open CRT files
If you cannot open the CRT file on your computer - there may be several reasons. The first and most important reason (the most common) is the lack of a suitable software that supports CRT among those that are installed on your device.
A very simple way to solve this problem is to find and download the appropriate application. The first part of the task has already been done – the software supporting the CRT file can be found in the table. Now just download and install the appropriate application.
Possible problems with the CRT format files
The inability to open and operate the CRT file does not necessarily mean that you do not have an appropriate software installed on your computer. There may be other problems that also block our ability to operate the Internet Security Certificate file. Below is a list of possible problems.
- Corruption of a CRT file which is being opened
- Incorrect links to the CRT file in registry entries.
- Accidental deletion of the description of the CRT from the Windows registry
- Incomplete installation of an application that supports the CRT format
- The CRT file which is being opened is infected with an undesirable malware.
- The computer does not have enough hardware resources to cope with the opening of the CRT file.
- Drivers of equipment used by the computer to open a CRT file are out of date.
If you are sure that all of these reasons do not exist in your case (or have already been eliminated), the CRT file should operate with your programs without any problem. If the problem with the CRT file has not been solved, it may be due to the fact that in this case there is also another rare problem with the CRT file. In this case, the only you can do is to ask for assistance of a professional staff.
Similar extensions
| .a4p | Adobe Authorware Package Without Runtime |
| .a5w | Adobe Authorware Unpackaged Format |
| .adr | Opera Bookmarks Format |
| .aex | Greetings Card Format |
| .alx | BlackBerry Application Loader Format |
| .an | Adobe Edge Animate Project Format |
| .ap | Fifth Generation Systems Active Page Format |
| .aro | SteelArrow Script Format |
How to associate the file with an installed software?
If you want to associate a file with a new program (e.g. my-file.CRT) you have two ways to do it. The first and the easiest one is to right-click on the selected CRT file. From the drop-down menu select "Choose default program", then click "Browse" and find the desired program. The whole operation must be confirmed by clicking OK. The second and more difficult to do is associate the CRT file extension to the corresponding software in the Windows Registry.
Is there one way to open unknown files?
Many files contain only simple text data. It is possible that while opening unknown files (e.g. CRT) with a simple text editor like Windows Notepad will allow us to see some of the data encoded in the file. This method allows you to preview the contents of many files, but probably not in such a structure as a program dedicated to support them.