How to open CRT files

Did your computer fail to open a CRT file? We explain what CRT files are and recommend software that we know can open or convert your files.

What is a CRT file?

The CRT file extension indicates to your device which app can open the file. However, different programs may use the CRT file type for different types of data.

We are aware of 3 different uses of the CRT extension, which you can read more about below.

C64 Cartridge image

Through our analysis of CRT files, we know that one use of the format is C64 Cartridge image. We have not yet described in detail what these files contain and what they are used for, but our team is working tiredlessly through thousands of file formats. We'd love hearing from you if you have information about the format.

We have not verified any programs yet that works with this specific format. If you know any, please use the 'Suggest a program' link below. Thanks!

Security Certificate

Through our analysis of CRT files, we know that one use of the format is Security Certificate. We have not yet described in detail what these files contain and what they are used for, but our team is working tiredlessly through thousands of file formats. We'd love hearing from you if you have information about the format.

We have not verified any programs yet that works with this specific format. If you know any, please use the 'Suggest a program' link below. Thanks!

X.509v3 security certificate

Through our analysis of CRT files, we know that one use of the format is X.509v3 security certificate. We have not yet described in detail what these files contain and what they are used for, but our team is working tiredlessly through thousands of file formats. We'd love hearing from you if you have information about the format.

We have not verified any programs yet that works with this specific format. If you know any, please use the 'Suggest a program' link below. Thanks!

Software that will open, convert or fix CRT files

These apps are known to open certain types of CRT files. Since many different programs may use CRT files for different purposes, you may need to try a few of the apps to open your specific CRT file.

We have not verified any programs that we know for certain can work with CRT-files on Mac. If you know one, please use the Suggest link below and tell us about it!
We have not verified any online services that we know for certain can work with CRT-files. If you know one, please use the Suggest link below and tell us about it!