Writing
Title Case Converter
A title case converter capitalizes the main words of a heading and keeps the small words lowercase, following a real style guide. Paste a title below to see it in both AP and Chicago style at once, then copy the one you need. Everything runs in your browser.
WORDS
9the two styles differ hereTitle case
AP style
The Man With a Plan: A Journey Through Time
Associated Press. Capitalizes prepositions of four letters or more.
Chicago style
The Man with a Plan: A Journey through Time
Chicago Manual of Style. Lowercases all prepositions.
The rules this converter follows
| Group | How it is handled |
|---|---|
| Major words | Nouns, verbs, adjectives, adverbs, and pronouns are always capitalized. |
| Articles | a, an, and the are lowercase unless they are the first or last word. |
| Conjunctions | The short joining words and, but, or, nor, for, yet, and so stay lowercase. |
| Prepositions | AP lowercases prepositions of three letters or fewer. Chicago lowercases every preposition. |
| First, last, and after a colon | The first word, the last word, and the first word of a subtitle are always capitalized. |
How to use it
1. Paste your heading
Type or paste a title. Any mix of cases is cleaned up for you.
2. Read both styles
See the AP and Chicago versions side by side, so you can match your house style.
3. Copy the one you need
Each style has its own copy button. Nothing leaves your browser.
Common questions
What is the difference between AP and Chicago title case?
Both styles capitalize the main words and lowercase articles and short conjunctions. The difference is prepositions. AP style capitalizes any preposition of four letters or more, such as With, From, and Over, while Chicago style keeps every preposition lowercase no matter its length. So "The Man With the Golden Gun" is AP and "The Man with the Golden Gun" is Chicago.
Which words stay lowercase in title case?
Articles (a, an, the), the coordinating conjunctions (and, but, or, nor, for, yet, so), and prepositions stay lowercase in the middle of a title. The exact set of prepositions that is lowercased depends on the style. The first word, the last word, and the first word after a colon are always capitalized, even when they are small words.
Does it handle hyphenated words and subtitles?
Yes. Each part of a hyphenated compound is capitalized unless it is a small word, so "well-being" becomes "Well-Being" and "state-of-the-art" becomes "State-of-the-Art". The first word after a colon is capitalized so subtitles read correctly.
Does my text leave my device?
No. The conversion runs entirely in your browser with plain JavaScript. Nothing you type is sent to a server, so the tool keeps working the same way even after the page has loaded and you go offline.