Chicago Style Title Case Converter
Capitalize headlines by real style-guide rules — AP, APA, Chicago and MLA — with correct handling of articles, prepositions, hyphens and colons.
Processed entirely in your browser — nothing you enter here is ever uploaded.
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About this tool
This page opens the title capitalization tool with Chicago style preselected — paste your title, run it and copy the result, and compare it with the AP, APA and MLA versions rendered next to it.
The Chicago Manual of Style is the reference for book publishing and long-form editing. Chicago lowercases all prepositions regardless of length — "over", "between", "throughout" all stay down — along with articles and coordinating conjunctions, while capitalizing the first and last words, both parts of hyphenated compounds and the word following a colon.
That length-blind preposition rule is where Chicago visibly differs from AP and APA: "The Quick Brown Fox Jumps over the Lazy Dog" is correct Chicago. The tool applies it consistently, line by line, entirely in your browser.
Example. Under AP rules the phrase the lord of the rings becomes The Lord of the Rings.
Limit. Minor words are the built-in article, conjunction, and preposition lists for AP, APA, Chicago, and MLA, applied per line.