Often happens either to receive files with Unknown extension (in emails, especially), either to somehow succeed (by mistake, of course) to delete or modify extensions SOME FILES Stored in the computer, which leads to the impossibility of opening the respective files. If you are in such a situation where you cannot open certain files because of the unknown format, Is there a method Simple with the help of which you can identify what extension have those files (or what type of files they are).
Three -day It's O application simple and free that helps users identify what extensions au unknown files FROM Binary signature of them. The application has flexible rules and can be "trained" to recognize quickly and automatic new files.

Three -day It is very simple to use. Users must click on Browse to select the unknown file they want to identify, then click on Analysis!. The application will display a series of information, which consist of Definition of the file name, the author's name who created the file and Email to it (if available in binary signature), links by Reference URLs and comments about the file.
The application uses o Expertable database, to which we are always added new Definitions which describe repetitive patterns of the types of files supported.
Users who do not want to install Tridnet can use a Online version of the application (which in principle does the same thing).

The only difference is that the online version is recommended for smaller files, for large files recommending the installation of Tridnet (those familiar with command lines/Command Prompt I can use Cli version of the application, Want, go interface gRafic).
Download Want (Fara Gui) – http://goo.gl/aJVb
Note: Application compatible with Windows XP, Windows Vista, Windows 7 and Windows 8.
STEALTH SETTINGS – How to identify unknown file type without extensions in Windows