File Extension Database

Open REQ File

The REQ file extension is used by digital certificate files.

REQ files are used in the cryptographic public key processing process, which in turn is used for identification of users and machines on the Internet.

About Digital Certificates

The purpose of digital certificates, which make use of a REQ file, is authentication of a given entity online to assure peers that the entity is trustworthy and to ensure security.

Digital certificates ensure secure communication over the Internet thanks to the Public Key Infrastructure (PKI) that manages the distribution of certificates.

The REQ file, which contains a Certificate Request Certificate (CRS), is required to obtain a digital certificate.

The REQ file is sent to the certification authority or trusted entities, which processes the most requested and grants the user the digital certificate.

REQ files are used to validate identities on the Internet.

Digital certificates validate the authenticity of an online business or merchant so that users or customers can know that the website is trustworthy and secure.

REQ files can be found on all system platforms, including mobile, but there is no guarantee each will properly support such files.

Software to open and work with the REQ file extension

The following list enumerates programs that are compatible with REQ files.

OpenSSL

How Can I Open REQ File on Windows

We researched and learned that the best way to open REQ file is to find a REQ file in question in Windows OS File Explorer and double click on it to launch the corresponding application.
If a REQ file is not opened in an application and you instead get a "Windows can't open a file" error message you should try looking for an application which can open the file in question.
If you know the application which can open REQ file then run it and see if there is a File->Open main menu option in the application.
If you don't know the application which function as REQ file opener then try to search online for "REQ viewer", "application to open REQ file" or "open REQ file" queries in the search engine you like.
Install the application you found and check if it can open REQ file

How Can I Open REQ File on Mac OS

We recommend to find a REQ file in question in Mac OS Finder and double click on it to launch the corresponding application.
If a REQ file is not opened in a Mac OS application and you instead get a "There is no application set to open the file" error message you can click on "Search App Store" in the error dialog and Mac OS will show you applications compatible with REQ file.
If you know the Mac OS application which can work as REQ file opener you can choose the "Choose Application..." option in the error box to associate the file extension and open REQ file in it.
If you don't know the application which can open REQ file then try to search for "REQ viewer", "application to open REQ file" or "read REQ file" queries in the online search engine you like.
Install the application you found and check if it can read REQ file

How Can I Open REQ File on Android

If you downloaded a REQ file on Android device you can open it by following steps below:

In the Android apps list on your Android device find "My Files" or "File manager" app and tap to start it.
Tap on "Downloads" folder inside the app.
You should see your downloaded REQ file in that folder.
Tap on the file. If Android device supports opening the file you downloaded it will open in the corresponding app.
If file does not open you can look for the corresponding app that can open the file by searching Android App Store for the "REQ".
If you cannot open the file with the apps from Android App Store it is possible that the file could only be opened on desktop platforms such as Windows or Mac OS. Try searching for "REQ viewer", "REQ file reader" online and see if any desktop applications can open it.
It is also possible that the file you downloaded is outdated and is no longer supported.

How to Open REQ File on iPhone or iPad

To open REQ File on iOS device follow steps below:

We advies to open Files app on your iPhone or iPad device. You can find it by swiping down on the home screen and typing "Files" in the search bar.
Tap on the Downloads folder on the Files app home screen.
You will see all files that you recently downloaded. Tap on the REQ file to view it.
If you have the right app that can open it it will automatically launch and open your file.
If you don't have the app which can open it you need to serch Apple app store for "REQ". This way you can find apps which can open REQ files.
If this doesn't help it is possible that your file could be opened only by the desktop application. To find an app which can open it on desktop look for "REQ viewer" or "REQ file" online in your favorite search engine.

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