Converting texts between formats is a bit of a pain to do on a file-by-file basis, but thankfully, MacIssues shows how to convert text files in bulk using a simple terminal command.

Advanced Renamer lets you batch-rename files by adding or removing strings of text, including EXIF data from images, or even concatenating filenames with the GPS location from pictures.

Program source code, batch files, macros and scripts are straight text and stored as ASCII files. HTML and XML files are also ASCII files.