.crt file extension
- Security Certificate file.
Also known as an Internet security certificate file because it is the format of the security certificate used by secure web sites. Web browsers will automatically recognise .crt files as certificate files, so the user is not normally aware of them.
Can you add to this? Do you know of any applications not already listed which will work with .crt files, view .crt files or open .crt files? Are you able to contribute any additional reference information or file format information about .crt files or have you spotted any errors or omissions? If so please let us know by emailing us at firstname.lastname@example.org - Thank you.