Case Converter Guide
A case converter changes the capitalization of text without changing the letters themselves: turning "hello world" into "HELLO WORLD", "Hello World", or "Hello world". It's the fastest fix when you left Caps Lock on: paste the shouting text and pick Sentence case, Title Case, or Capitalized Case. It also helps when you need a headline capitalized correctly or need to match a style guide.
Capitalized Case capitalizes the first letter of every word, no exceptions. Title Case follows real title-capitalization rules: short articles, conjunctions, and prepositions ("a", "an", "and", "the", "of", "in", "on", "to", "for", and similar) stay lowercase unless they're the first or last word, so "the lord of the rings" correctly becomes "The Lord of the Rings", not "The Lord Of The Rings".
No, a naive "capitalize the first character" approach breaks on multi-sentence text. This tool's Sentence case capitalizes the first word of every sentence (after a period, question mark, or exclamation point), not just the very first letter of the whole input, and it also fixes the standalone pronoun "i" to "I".
Not when your text has lowercase letters in it. Title Case, Sentence case, and Capitalized Case leave all-caps acronyms (NASA, FBI) and internal capitals (iPhone, McDonald) exactly as you typed them instead of flattening them to "Nasa" or "Iphone". Text with no lowercase letter at all reads as Caps Lock, so every word is converted, acronyms included: THE NASA TEAM becomes The Nasa Team, and you retype the acronym afterwards. Names that start with Mc or O' get their second capital (McDavid, O'Brien), while Mac, van, and de are treated as ordinary words. It also correctly capitalizes accented first letters, so a word like "über" becomes "Über" instead of "üBer", a common miss in tools that only support the English alphabet.
Alternating case flips between lowercase and uppercase letter by letter, the "mocking SpongeBob" meme style used for sarcasm on social media. Toggle case inverts whatever case each letter already is, so "Hello World" becomes "hELLO wORLD".
Yes, it's completely free with no sign-up. Every conversion happens instantly in your browser: your text is never sent to a server.