Case Converter
Convert text between UPPER, lower, Title, Sentence, aLtErNaTiNg and InVeRsE case.
How this calculator works
Reformatting text by hand is pure busywork - this case converter does it in one click. Paste any text, pick a style, and the converted result appears instantly with a copy button ready. UPPER CASE suits headings and acronyms; lower case normalizes pasted SHOUTING; Title Case capitalizes every major word for headlines; Sentence case lowercases everything then capitalizes each sentence start, the fastest way to fix an all-caps paragraph.
The two playful modes are the differentiator most converters skip: aLtErNaTiNg cAsE alternates letter by letter (skipping punctuation so the pattern stays clean) for stylized social posts, and InVeRsE cAsE flips every letter's case - handy for fixing text typed with Caps Lock on. All transforms are Unicode-aware, so accented characters (é, ñ, ü) convert correctly rather than being mangled.
Title case here follows the common headline convention of capitalizing every word; formal style guides (APA, Chicago) lowercase short articles and prepositions, so give academic titles a final glance. Everything runs locally in your browser with a live character and word count on the output - nothing you convert is uploaded anywhere.