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, 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".
No. Title Case, Sentence case, and Capitalized Case all detect words that are already intentionally capitalized — all-caps acronyms (NASA, FBI) and internal capitals (iPhone, McDonald) — and leave them exactly as you typed them instead of flattening them to "Nasa" or "Iphone". 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.