Your example is an embedded graphic file. Gimp is as good as anything.
If you are starting from scratch use an application such as LibreOffice where text +font information are embedded in the file.
Edit: A quick page of txt from LibreOffice. Notice the file size
If you are starting from scratch use an application such as LibreOffice where text +font information are embedded in the file.
Edit: A quick page of txt from LibreOffice. Notice the file size