File Extension UNKNOWN

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Descriptions. Workarounds. Issues

File Extension UNKNOWN

File extension UNKNOWN doesn't belong to any particular application. Usually this means that Windows Operating System wasn't able to recognize file extension that you tried to use. To figure out what the file is about you need to do following:

  • Open File Explorer
  • Click right mouse button on a file that you're trying to open
  • Select Properties from the drop down menu.
  • Look at the "Type of file" field. This field will show what type your file has. If Windows doesn't know which Application should be used to open the file it will show "Unknown Application" in "Opens with" field.
  • Next step you can lookup type of this file on this site or search it on the internet
There are many ways to open file with specific file extension. There could be also multiple applications which you can use to open UNKNOWN file. Learn more how to open UNKNOWN file. Also you can try using hex or text editors like HexView or Notepad++ to open unknown files.

We hope you found this description of File Extension UNKNOWN useful.

    • We also created an article for you which step by step describes how to open any file extension on your computer.

      This article will teach you several simple methods which will allow you to figure out what is stored inside the file.

      Read an article on how to open any file extension

    • Find more information about file extension and other file problems in File Extension Knowledge Base

    • Also if you find an application on the web which claims to open your file make sure to scan it for viruses

      It is a very popular trick for an application to claim something it cannot do and instead install malware on your computer

      Read an article on Viruses, Trojans and Adware

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Extensions covered by File Extension Guru at this moment:

  pdf    rar    3gp    pps    dat    xls    flv    dll    torrent    bin    unknown    vob    kmz    doc    ppt    exe    sys    mov    mp4    m4a    zip    wpd    dmg    ica    thm    tmp    odt    xpi    bup    wmv    mkv    part    dwg    db    3g2    kml    mdf    bak    sav    r00    tar    jar    lzh    temp    daa    iso    cue    uif    r01    r02    r03    r04    r05    r06    r07    r08    r09    ifo    lha    7z    gz  

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