pure text
Computing term for text that contains no formatting, markup, or binary data; often contrasted with rich text or formatted documents.
このエディタはピュアテキストしか扱えない。
This editor can only handle pure text.
データをピュアテキスト形式で保存してください。
Please save the data in pure text format.
Variant with a middle dot; less common but still seen.
Loanword from English 'pure text'.