There is no single correct way to capitalise a headline. Pick a style and the rules change with it.
There is no single correct way to capitalise a headline. AP, Chicago, MLA and APA each draw the line in a different place, and a tool that ignores this will confidently hand you the wrong answer. Pick your style above and the rules change with it.
The disagreements are real and specific. AP capitalises every word of four letters or more, so it writes Over with a capital O. Chicago capitalises prepositions only when they are being used as something else, so it writes over in lowercase no matter how long it is. MLA lowercases all prepositions regardless of length. APA switches at four letters, like AP, but treats subtitles differently after a colon.
Hyphenated compounds are where most converters break down entirely. Well-Being under Chicago, Well-being under AP — same two words, different output, and neither is a typo.
Follow whatever your publication, instructor or client specifies. As a rough guide: AP for journalism and press releases, Chicago for books and long-form publishing, MLA for humanities coursework, APA for social sciences. If nobody has told you, Chicago is the safest general-purpose choice.
AP uses a length rule: any word of four letters or more is capitalised, which sweeps in prepositions like over, with and from. Chicago uses a grammatical rule: prepositions stay lowercase whatever their length, unless they are functioning as an adverb or adjective. The two systems disagree constantly on ordinary headlines.
It depends on the style. Chicago capitalises both parts of most hyphenated compounds, giving Well-Being. AP generally capitalises only the first part unless the second is a proper noun, giving Well-being. This is one of the most common places automated converters produce output an editor will correct by hand.
Most styles capitalise the first word of a subtitle following a colon. APA is explicit about this and so is Chicago. Select your style and the tool applies the matching rule rather than guessing.
In every one of the four styles here, yes. The first and last words of a title are capitalised regardless of what part of speech they are, so a title ending in a short preposition still gets a capital on that final word.
Acronyms already in capitals are left alone. Deliberately lowercase brand names such as iPhone or eBay are a known weak spot for every automated converter, including this one — check those by hand before publishing.
Almost always because the other tool implements a single unstated rule set, usually a rough approximation of AP. Comparing a style-aware converter against a style-blind one will produce differences on any headline containing a preposition of four or more letters.
For MLA and APA reference lists, check the specific requirement first. APA reference entries use sentence case for article and book titles, not title case, even though APA uses title case in the body text. The distinction catches a lot of students out.
Yes. All-caps input is normalised to lowercase first, then capitalised according to the selected style. Genuine acronyms may be lowercased in the process, so scan the result if your headline contains any.