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What is FSI file?

An FSI file extension contains a Visual F# Signature File file that contains data about the signature of a Visual F# project. The signature is necessary to ensure that the compiled code can be executed by an application.

FSI Format details

Full Name Visual F# Signature Format
Developer Microsoft
Category Developer Files

Tools that will help you view FSI files

Sometimes you need to quickly preview the contents of a file with the FSI extension. In such a situation, many people decide to find a tool that, according to its creators, can display the contents of the FSI file and many other types of files (All in One Viewer).

Of course, there are such tools. However, it should be remembered that they may display the data contained in the FSI file differently than the application dedicated to handling the FSI file extension. When you cannot afford to have the data of the FSI file displayed different from the original, you should use the applications developed to work with the FSI file.

Below you will find a list of software programs that will help you with this. These software programs will help you view the content of the FSI file, minimizing possible errors that may arise with other tools.

FSI File Viewers

  • TextEdit
  • GNU Emacs
  • gedit
  • Windows Notepad
  • Nvu
  • NotePad++ text editor
  • 6 FSI viewers