Yes. Copy any caption as-is or tweak it: no account, no attribution, no limits.
How do I style a caption in a fancy font?
Paste the caption into the font generator on the main page and copy it back styled. Style a word or phrase for emphasis and keep the rest plain so the caption stays searchable.
Do long captions hurt engagement?
The first line does most of the work, because feeds cut captions after a line or two. Front-load the hook, and keep the whole thing short unless the story genuinely earns the length.