CSR file format description

Many people share .csr files without attaching instructions on how to use it. Yet it isn’t evident for everyone which program a .csr file can be edited, converted or printed with. On this page, we try to provide assistance for handling .csr files.

1 filename extension(s) found in our database.

.csr - Certificate Signing Request Data

The CSR data files are related to OpenSSL. CSR file is a Certificate Signing Request Data. The CSR is a file containing a certificate application information, including the public key.

Application:

OpenSSL

Category:

Data files

Mime-type:

application/octet-stream

Magic:

- / -

Aliases:

req

Certificate Signing Request Data related extensions:

.ca: OpenSSL Certificate Authority Data
.crt: Certificate File
.der: Certificate File
.dgst: OpenSSL Message Digest Data
.kdb: Key Database File
.orq: OCSP Request Data

Naturally, other applications may also use the .csr file extension. Even harmful programs can create .csr files. Be especially cautious with .csr files coming from an unknown source!

Can't open a .csr file?

When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:

Windows can't open this file:

example.csr

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 one from a list of programs that are installed on your computer.

To avoid this error, you need to set the file association correctly.

Open Control Panel > Control Panel Home > Default Programs > Set Associations.
Select a file type in the list and click Change Program.

The .csr file extension is often given incorrectly!

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

ccr, cer, cr, crs, cs, csd, cse, csf, csg, cst, cwr, cxr, czr, dsr, fsr

Is it possible that the filename extension is misspelled?

Similar file extensions in our database:

.crs: CompuTrainer Chart Screen
.cse: Cardinal Studio Template File
.scr: Amstrad CPC Advanced OCP Art Studio Image
.cst: Adobe Director Cast
.csd: Compact Shared Document
.cst: SAM Constraints Data

Operating systems

DataTypes.net currently supports the following operating systems:

Windows XP/Vista, Windows 7/8, Windows 10, CentOS, Debian GNU/Linux, Ubuntu Linux, FreeBSD, Mac OS X, iOS, Android

If you find the information on this page useful, please feel free to link to this page.

https://datatypes.net/open-csr-files

If you have useful information about the .csr file format, then write to us!