Title Case Converter

Title Case vs. Sentence Case, and Why Minor Words Matter

Title Case is the capitalization style used for headlines, book titles, and article titles — most words are capitalized, but a handful of short "minor" words (articles, coordinating conjunctions, and short prepositions) stay lowercase when they fall in the middle of the title. Sentence case is the ordinary capitalization used in normal prose: only the first letter of the sentence, and the first letter after any sentence-ending punctuation, gets capitalized. Both styles matter for different jobs — Title Case for headings and titles, Sentence case for body text and captions — and getting either one right by hand across a long piece of text is tedious and easy to get inconsistent.

Which Words Stay Lowercase in Title Case

This tool follows the standard title-case convention shared by most major style guides: articles (a, an, the), coordinating conjunctions (and, but, or, nor, for, so, yet), and short prepositions (of, in, on, at, to, by, up, as) stay lowercase — but only when they appear in the middle of the title. The very first and very last word of the title are always capitalized, regardless of what they are, since a lowercase word sitting right at the start or end of a title reads as a mistake rather than a style choice.

Worked Example

The input "the lord of the rings: the fellowship of the ring" converts to "The Lord of the Rings: the Fellowship of the Ring" in Title Case — notice "of" and "the" stay lowercase throughout the middle, including the "the" right after the colon, since this tool's first/last-word rule looks at the very first and very last word of the entire input, not each clause after a colon separately; only the true first word ("the" → "The") and true last word ("ring" → "Ring") get capitalized purely for being at the edge. In Sentence case, the same input becomes "The lord of the rings: the fellowship of the ring" — only the first letter of the whole string is capitalized, since there's no sentence-ending punctuation anywhere in that phrase to trigger a second capital.

A Brief History of Title Case

English capitalization used to be far more liberal than it is today. Through the 17th and into the 18th century, English writers and printers commonly capitalized most nouns in a sentence, not just proper ones — much the way German still capitalizes every noun today. Manuscripts and printed books from writers like Swift and Pope are full of these initial capitals. Grammarians pushed back over the course of the 18th century, and by the early 1800s the looser convention had largely died out in ordinary prose, leaving English with roughly the rule still used today: capitalize proper nouns and the start of a sentence, and little else.

Headlines and titles kept a version of the older habit alive rather than following prose all the way down to sentence case. Selectively capitalizing the "principal" words of a title, while dropping minor connecting words like "the" and "of" to lowercase, became a standard newspaper convention through the 19th century, and style guides eventually wrote down the exact rules — the Chicago Manual of Style's first edition, published in 1906, was among the earliest to formalize which words counted as minor. That's essentially the same convention, largely unchanged over a century later, that this tool applies today.

Common Capitalization Mistakes

Capitalizing every single word, including minor words like "of" and "the," is the most common Title Case mistake — it produces a title that reads as amateurish to anyone familiar with standard style conventions. The opposite mistake — lowercasing the first or last word because it happens to be a minor word ("of Mice and Men" instead of "Of Mice and Men") — is just as common and just as noticeable. For Sentence case, the usual error is leaving mid-sentence capitals in place from the original text (typed-in emphasis, a proper noun that isn't actually capitalized in true sentence case rules) — this tool lowercases everything first, so any capitalization that should stay (a proper noun, an acronym) needs to be restored by hand afterward.

Capitalization Terms You Should Know

Minor Word — a short, low-emphasis word (article, coordinating conjunction, or short preposition) that conventionally stays lowercase in the middle of a Title Case heading.

Headline Style — another name for Title Case, most associated with newspaper and magazine headlines.

Down Style — the opposite convention, where only the first word of a heading and any proper nouns are capitalized, closer to Sentence case than Title Case.

Sentence-Ending Punctuation — a period, exclamation mark, or question mark followed by a space, the signal Sentence case uses to know where the next capital letter belongs.