You can view these within Detect It Easy, edit and even debug them. For example, the logic to identify file types isn't hard-coded into the program, rather it's organised into scripts.

This is far more configurable and expandable than you might expect, too.

If you're looking for a packer identifier then the program does a good job, as well as providing plenty of bonus information (it doesn't just calculate entropy but shows it graphically), and a disassembler for the real experts. You're able to browse its contents at byte level, search for ANSI or Unicode text, dump a selected number of bytes to a file, and more. Need to know more? Click 'H' and the file opens in a hex viewer. Any supported file types will be displayed, and you'll sometimes get bonus information, too (the format version, like '1.4' for PDFs, or the number of files in an archive). If a file extension is missing or incorrect, drag and drop it onto Detect It Easy to find out more.

The program can identify more than 200 file types from their contents, for instance. It's designed as a packer identifier, something which tells you more about a Windows executable and how it was created, but it has other applications, too. Detect It Easy is a free portable tool for investigating the contents of files.

Detect It Easy 3.08 for mac instal free