These files are incredibly lightweight and open instantly on any device, from Google Chrome to Windows Notepad .
If you need formatting later, you can easily save a .txt file as a Word doc or PDF.
About this app ... txtpad is a convenient, simple and free notepad that lets you create . txt files. There is nothing superfluous, Google Play
The file does not appear to be a known public software or standardized document; rather, it looks like a specific system-generated or user-uploaded plain text file.