Easily Open Files that have Unknown Extensions

Extensions, or the characters that precede the last period in a file name, help you determine the type of a file (is it an image, a video or something else) and you immediately know which software program is required to preview that file.

Identifying Files that don't have an Extension
If a file doesn't have an extension, you can still identify the format of that file from its signature. All known file types have a standard and unique signature and this data is stored in the file itself. There are programs that can read this signature* and determine the file format even if the extension is missing from the file name.

The most popular program in the category of file identifiers is TrIDNet. First download and unzip the TrIDNet utility and the associated XML definition files in the same directory. Then open the TrIDNet.exe file, press the "Rescan Defs" button to load the file signatures (you only need to do this once) and then drag-drop any unknown files that you wish to analyze.