Anything that you paste into the address or search bar of any Web browser is automatically converted to plain text. Pasting plain text will always cause it to match the formatting of the destination.
So, to quickly and easily make text match the destination formatting when pasted, just do this:
- Paste it into the search bar.
- Copy it back.
- Paste it into your destination.
[crarko adds: I tested this, and it works as described. I'd probably use BBEdit for the conversion but this will work too.]

