Text / Letter case
Case Converter
Switch letter case without rewriting spaces, punctuation, numbers, or line breaks.
Ready.
Practical notes
Conversion rules
Upper, lower, and swapped case use the browser's Unicode-aware case mappings. Title case capitalizes the first letter or number-led word segment and lowers the remaining letters. Sentence case capitalizes the first cased letter after sentence punctuation.
Language-specific casing can vary. This tool uses the browser's default Unicode behavior rather than editorial rules for a particular style guide.