Chicago Style uses selective title case capitalization according to detailed rules, while uppercase converts every letter to a capital.
Chicago Style capitalizes all major words and long prepositions while lowercasing short prepositions of four letters or fewer, articles, and coordinating conjunctions. It is the dominant style for American book publishing.
Chicago Style is required for most manuscripts submitted to book publishers, literary journals, and academic presses. Scholars in the humanities default to it.
Open Chicago Style converterUppercase converts every letter to its capital form without exception. It is used for warning labels, legal notices, acronyms, design contexts, and any text requiring maximum visual weight.
All caps is appropriate for short, high-emphasis phrases, system alerts, and design headlines. Extended uppercase text is harder to read and should be used sparingly.
Open Uppercase converterChicago Style is required for most manuscripts submitted to book publishers, literary journals, and academic presses. Scholars in the humanities default to it.
Prepositions of five or more letters are capitalized. Short prepositions like in, on, at, by, and of remain lowercase.
All caps is appropriate for short, high-emphasis phrases, system alerts, and design headlines. Extended uppercase text is harder to read and should be used sparingly.
Every letter is capitalized. Punctuation, numbers, and symbols are unchanged. Letter-spacing is often added in design contexts to improve readability.
Choose Chicago Style for formal publication titles and academic headings.
Choose uppercase for short emphasis phrases, warnings, and design contexts.
Uppercase is never a substitute for Chicago Style in publishing contexts. It is a typographic tool for emphasis, not a headline convention.