Capitalization guide
How sentence case works
Sentence case capitalizes the beginning of each sentence while keeping ordinary words lowercase. Proper names and acronyms still need their canonical spelling.
Sentence boundaries
The converter recognizes the start of the text, line breaks, and words following periods, question marks, and exclamation points. It also handles common closing quotes and brackets around a boundary.
HELLO WORLD. HOW ARE YOU?AfterHello world. How are you?Proper terms and acronyms
A conservative dictionary restores common geographic names, nationalities, languages, and technology names. Acronyms such as API, CSS, NASA, SQL, UK, and USA remain uppercase. You can add request-specific names such as AcmeCloud without permanently storing them.
Multiline and quoted text
Each new line is treated as a fresh sentence start. Opening quotation marks are preserved while the first enclosed letter is capitalized, producing text such as “Hello world!” She said.
Ambiguous words
All-caps input removes clues that a person would normally use. For example, Polish can describe a nationality, while polish can be a verb. The built-in dictionary is intentionally conservative, so review ambiguous proper names and add a custom term when necessary.
Sentence case versus title case
Use sentence case for ordinary prose, interface labels, descriptions, and headings that follow a sentence-style convention. Use title case when a publication or organization expects major words in a heading to be capitalized.