Opening an II File

The II file type is primarily associated with GCC.

IIFile Extension II
File extension: II
File type:  text file

What is an II file?

II files mostly belong to GCC. II files contain preprocessed C++ source code that results from running a C++ file through the preprocessor stage. This process expands macros and includes header file content, so the file shows how the source code appears before further compilation.
Key details compiled by FilExt.com include:
  • Intermediate Stage: The file represents the code after all macro expansions and include directives have been processed.
  • Compiler Use: Utilities like the GCC compiler generate these files during the build process.
  • Debugging Tool: They can help track issues in macro expansion or include handling when analyzing code.
  • FilExt.com note: For further details, refer to the GCC official website.

    How to open an II file

    You need a suitable software like GCC to open an II file. Without proper software you will receive a Windows message "How do you want to open this file?" or "Windows cannot open this file" or a similar Mac/iPhone/Android alert. If you cannot open your II file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a II file directly in the browser:. Just drag the file onto this browser window and drop it.

    Online II Text Viewer

    Choose your .ii file to analyze

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    Programs that open and convert II files:

    1. GCC
      See the previous paragraphs to learn more about the main application. II files are often referred to as GCC developers because this type of file is primarily created or used by this software.
    2. Gcc Preprocessed C++ Source Code

    Technical Data for II File Extension

    File classification:
    Developer
    Related files:
    i, cpp, cc, cxx, h, hpp, o, ll, iso, ans, csv, jks, c++

    The following listing is compiled from the database produced by the 'Associate This!' program, selected data from the main FILExt database and file extension information submitted by users.

    ProgramID: iiifile
    EXEFile: rundll32.exe msconf.dll,NewMediaPhone %l


    an ii text file is a special file format and should only be edited and saved with the appropriate software.

    How to solve problems with II files

    • Associate the II file extension with the correct application.
    • Update your software that should actually open text files. Because only the current version supports the latest II file format. Search, therefore, e.g. on the manufacturer website after an available GCC update.
    • To make sure that your II file is not corrupted or virus-infected, get the file again and scan it with Google's virustotal.com.
    • Click here to open your .II file online - secure, fast, and no downloads needed.
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    II file viewer II file description