Paste a headline or title, press Convert and get it back in AP-style title case. It is free, needs no sign-up, and your text never leaves your browser.
Based on https://github.com/words/ap-style-title-case.
It capitalizes the first letter of every word except these short words, which stay lowercase: “a,” “an,” “and,” “at,” “but,” “by,” “for,” “in,” “nor,” “of,” “on,” “or,” “so,” “the,” “to,” “up” and “yet.”
The first and last words are always capitalized, even when they are on that list. Both parts of a hyphenated word are capitalized, as in “Self-Employed.”
That follows AP’s rule for composition titles: capitalize the principal words, including prepositions and conjunctions of four or more letters, and lowercase short articles, conjunctions and prepositions.
AP uses title case for composition titles — books, movies, songs and other works. AP’s own news headlines use sentence case, with only the first word and proper nouns capitalized. Many publishers, blogs and company websites still set their headlines in AP title case, and that is what this tool is for.
For the full comparison, read AP Style vs. Chicago Style: A Complete Comparison.