Utility Mill

Upload a Windows EXE file or DLL and get a pretty report of all the information included in it.

NOTE: Stick to files under 500KB to avoid timing out this utility.

This could be useful if you find some EXE or DLL file and you want to find out where it came from, who made it, a website, what resources are in it, etc.

This utility is basically a wrapper around the excellent pefile program. Keep in mind, you can do a lot more great things with pefile, such as modify and save exes.

Here is how Wikipedia explains this format of Executable file

The Portable Executable (PE) format is a file format for executables, object code, and DLLs, used in 32-bit and 64-bit versions of Windows operating systems. The term "portable" refers to the format's versatility in numerous environments of operating system software architecture. The PE format is basically a data structure that encapsulates the information necessary for the Windows OS loader to manage the wrapped executable code. This includes dynamic library references for linking, API export and import tables, resource management data and thread-local storage (TLS) data. On NT operating systems, the PE format is used for EXE, DLL, OBJ, SYS (device driver), and other file types. The Extensible Firmware Interface specification states that PE is the standard executable format in EFI environments.