Filename
![Screenshot of a Windows command shell showing filenames in a directory](/Images/godic/202502/07/Dir_command_in_Windows_Command_Prompt3137.png")
![filename list, with long filenames, foreign letters, comma, dot and space characters as they appear in a software displaying filenames](/Images/godic/202502/07/EMule_v.049b3137.JPG")
A filename (also written as two words, file name) is a name used to uniquely identify a computer file stored in a file system. Different file systems impose different restrictions on filename lengths and the allowed characters within filenames.
A filename may include one or more of these components: