Open a new, blank document in (Windows) or TextEdit (Mac).

This combines every .txt file in the folder into one new file called merged.txt . If you are on macOS or a Linux system:

To put together text files extracted from "55744.rar," you can use simple command-line tools or manual methods depending on your operating system. This is the fastest way to merge many files at once. Extract the .rar file to a specific folder.

Open the and navigate to your extracted folder using the cd command. Use the cat (concatenate) command: cat *.txt > merged.txt

Example: =TEXTJOIN(" ", TRUE, A1, B1) will combine cells A1 and B1 with a space between them.