File Extension Library


  • Developer by: Apple
  • Category: Data Files

What are .CERTSIGNINGREQUEST files and how to open them?

Can't open .CERTSIGNINGREQUEST file? Are you wondering what it contains? On our site we will explain to you what this file is, what it is used for and what software opens the .CERTSIGNINGREQUEST file.

What is a .CERTSIGNINGREQUEST file extension?

.CERTSIGNINGREQUEST file extension is created by Apple. .CERTSIGNINGREQUEST has been classified as Data Files.

.CERTSIGNINGREQUEST is Apple Developer Signing Certificate Request File

Certificate request file created by Keychain Access, an Apple tool that manages and stores passwords and certificates; contains data referenced by Apple to request a signing certificate for iOS and Mac development.

You will need to upload your CERTSIGNINGREQUEST file to "" (you'll need an Apple ID to login). This is necessary in order to request a Development and Distribution Certificate that enables you to generate .IPA files, which are needed for final distribution and uploading of your app(s) to Apple.

To create the CERTSIGNINGREQUEST file:

  • Select Keychain Access → Certificate Assistant → Request a Certificate From a Certificate Authority....
  • Enter the appropriate information in the fields, click Continue.
  • Name your file (or leave it as the default "CertificateSigningRequest" name), choose the save location, and click Save then Done.

    CertificateSigningRequest.certSigningRequest - The default name for your CERTSIGNINGREQUEST file.

    List of all softwares that can open the Apple Developer Signing Certificate Request File
    Apple Keychain Access

    How to fix problems with .CERTSIGNINGREQUEST files

    1. You need to update the application that you normally use to open .CERTSIGNINGREQUEST files. Only the latest version of the software supports the current .CERTSIGNINGREQUEST file format
    2. You need to check the .CERTSIGNINGREQUEST file for viruses. To do this, you need to scan it with a popular antivirus (Norton, Nod32, Kaspersky, Dr.Web, etc.)