ASCII text-formatted data. TXT is a file extension for a text file, used by a variety of text editors.. Text is a human-readable sequence of characters and the words they form that can be encoded into computer-readable formats.
What is a TXT file? Files that contain the .txt file extension are files that store unformatted generic text contents. These files can be created by almost any text editing or word processing application, however, the TXT file format does not support features and functions such as tables, graphics, bolding or italics.