Character spacing to fill line

I would like to have a single line paragraph that would stretch across entire page, but not with adjusted space between words, but rather character spacing. Is this possible automatically, or do I need to adjust character spacing manually?

edit: In my case, I want to use this in header, if it’s possible.

You have to change character spacing explicitly to justify a paragraph. Don’t take that to extremes - you still want your text to be readable.

I edited the question, maybe my use case will clarify things. I want to have a heading that will fill entire width of page, but it consists (in my case) of two words, so “justify” doesn’t look well.

Break each word into its component characters and use full justification for the last line of the paragraph

And yes: if you use fields, it’s not possible. You can manually change the character spacing, but it is not possible to do so automatically.

I should have come up with this myself, that’s pretty ingenious man!