Switch your text between cases, then copy the result.
Title Case capitalises the first letter of every word; Sentence case capitalises only the first letter of each sentence. Pick whichever a heading or body style calls for.
The conversion runs as you type and never leaves your browser.
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Title Case capitalises every word (This Is Title Case). Sentence case capitalises only the first word of each sentence (This is sentence case).
Yes. Paste it in and choose Sentence case or lowercase to bring it back to normal.