TextCleaner - The Text Cleaning Tool
textcleaner.net
What Jamie wrote
I often bring text into Sublime Text or Drafts to make sure it has no hidden formatting or other metadata. Why? Because frequently when you copy text out of some apps it has a lot of unknown metadata and hidden formatting in it (yes, Microsoft Word, you!). Tools like this help make sure it is just simple text.
Text cleaner is an all-in-one text cleaning and text formatting online tool that can perform many simple and complex text operations including format text, remove line breaks, strip HTML, Convert case, and find and replace text online.
Related to this, after using Macs for decades I just recently learned that when you paste, if you do cmd-opt-shift-V it will paste the clipboard as plain text!