Title Case Converter — proper headline capitalization

The title case converter turns any sentence, headline, or product name into properly capitalized Title Case — capitalizing major words while correctly lowercasing minor words like "a," "an," "the," "and," "or," "but," "of," and "in," except when they start or end the title. It runs entirely in your browser using vanilla JavaScript, so nothing you type or paste is ever sent anywhere.

This is one of several free, no-sign-up text tools built by Arb Digital, a US digital marketing agency that writes content, builds websites, and runs ad campaigns for clients. Title case comes up constantly in that kind of work — blog post titles, page headings, email subject lines, ad headlines, product names — and getting it right by hand is more error-prone than it looks, because "correct" title case isn't simply "capitalize every word." This tool applies the actual rule so you don't have to memorize which small words stay lowercase.

What Title Case Converter Does

Type or paste text into the input box, pick a style (AP or Chicago), and click convert. The tool splits your text into words, capitalizes the first letter of each major word, and deliberately lowercases minor words — short conjunctions, articles, and (in Chicago style) prepositions — unless that word happens to be the first or last word of the title, in which case it's capitalized regardless of what kind of word it is. Alongside Title Case, the tool also includes one-click buttons for UPPERCASE, lowercase, and Sentence case, since those three conversions are frequently needed alongside title case in the same editing session.

The tool tracks how many words were processed and how many of them were minor words that got deliberately lowercased, so you can see at a glance that the conversion is doing more than a blind "capitalize everything."

How to Use It

1. Paste or type your text. This works on anything from a single headline to a longer block of text, though title case is most commonly applied to short titles and headings rather than full paragraphs.
2. Choose a style. AP Style keeps prepositions like "in," "on," "with," and "for" capitalized (matching how news headlines and most everyday writing handle title case), while Chicago Style additionally lowercases short prepositions of any length that aren't the first or last word.
3. Click "Convert to Title Case." Review the result, checking especially the first and last words and any minor words in the middle.
4. Use the other buttons if needed. UPPERCASE and lowercase give you a full case change, while Sentence case capitalizes only the first letter of the text (and after periods), which is the standard style for body text and most on-page headings that aren't meant to look like formal titles.
5. Copy the result and paste it wherever you need — a CMS title field, an email subject line, or an ad headline.

The Rule Behind Proper Title Case

Correct title case capitalizes all "major" words — nouns, pronouns, verbs, adjectives, adverbs, and subordinating conjunctions — while lowercasing "minor" words: articles ("a," "an," "the"), coordinating conjunctions ("and," "but," "or," "nor," "for," "yet," "so"), and short prepositions ("in," "on," "of," "to," "at," "by," "up," "off," "with," etc., depending on the style guide). The exception that trips people up most often is that the very first and very last word of the title are always capitalized, no matter what part of speech they are — so a title like "of mice and men" correctly title-cases to "Of Mice and Men," with "Of" capitalized purely because it's the first word, even though "of" is normally a lowercase minor word everywhere else in the title.

This tool implements that rule with a fixed list of minor words checked against each word's position: any word in the list is lowercased unless it's at index zero (the first word) or the final index (the last word) of the title, in which case the normal capitalization rule wins.

AP Style vs. Chicago Style Title Case

The two most common title case conventions in American writing are AP Style, used by most news organizations and widely adopted for web headlines and marketing copy, and Chicago Style, used in academic and book publishing. The core difference is how they treat prepositions. AP Style generally capitalizes prepositions that are four letters or longer (like "With," "From," "Into") while lowercasing short ones ("in," "of," "on," "up"), reflecting guidance summarized in the AP Stylebook. Chicago Style, by contrast, lowercases prepositions of any length — so "With" would stay capitalized in Chicago as a major word by most modern implementations, but many strict Chicago-style guides push toward lowercasing more prepositions regardless of length, treating them consistently as minor words unless they're the first or last word of the title. Because style guides genuinely disagree on edge cases, most professional style guides — including the Merriam-Webster dictionary's guidance on headline style — recommend picking one convention and applying it consistently rather than mixing rules within the same publication.

For most marketing and web content — blog titles, page headings, ad copy — AP-style title case is the more common and expected choice, since it matches what readers see across most news sites and popular blogs. Chicago style is more common in books, academic papers, and formal publishing contexts. If you're not sure which your organization uses, check a recent style guide or a few published titles from the same publication for consistency.

Common Use Cases

• Blog post and article titles. Converting a working title typed in lowercase into publish-ready title case for a CMS title field.
• Page headings and navigation labels. Ensuring consistent capitalization across a website's menu items, section headers, and page titles.
• Email subject lines. Applying title case to subject lines for a more polished, professional appearance in campaigns.
• Product and service names. Formatting product titles consistently for an online store or service page.
• Ad headlines. Quickly converting draft ad copy into properly capitalized headline text for platforms like Google Ads or Meta Ads.

Sentence Case, UPPERCASE, and lowercase: When to Use Each

Title case isn't always the right choice. Sentence case — capitalizing only the first word (and proper nouns) — is the standard for body text, most UI labels, and increasingly for web headings, since many modern style guides consider it more readable and less "shouty" than full title case, especially for longer headings. UPPERCASE is reserved for short emphasis, acronyms, or specific brand or button styling, and using it for long stretches of text is widely considered harder to read and is generally avoided in body copy. lowercase is occasionally used stylistically for brand names or minimalist headings, but should be a deliberate design choice rather than a default. Having quick access to all four conversions in one tool makes it easy to compare options and pick whichever fits the specific title, heading, or field you're formatting.

Common Mistakes to Avoid

• Capitalizing every single word. This is a common but incorrect shortcut — true title case deliberately lowercases minor words like "and," "the," and "of" except at the start or end.
• Lowercasing the first or last word by mistake. Even minor words must be capitalized when they're the first or last word of the title — "The Lord of the Rings" keeps "The" capitalized because it's first, not because "the" is normally a major word.
• Mixing AP and Chicago rules inconsistently. Pick one style for a given site or publication and stick with it, rather than switching between conventions from one title to the next.
• Using title case for body text or long headings. Title case works best for short titles; applying it to full sentences or long headings can look cluttered and reduce readability.
• Forgetting hyphenated words. Style guides vary on whether both halves of a hyphenated word should be capitalized (like "Well-Known" vs. "Well-known") — check your specific style guide for hyphenation rules if precision matters.

Related Free Tools From Arb Digital

Clean up spacing first with Remove Line Breaks, or organize a list of titles with Sort Text Lines and Remove Duplicate Lines. For broader editing, try our Find and Replace Text tool. Also check our Word Counter and Character Counter. Browse everything in our free online tools hub.

AP vs Chicago: Two Rulebooks, Different Results

"Title case" sounds like one rule but is really several competing style guides, and they disagree often enough to matter. The two dominant systems are AP style (Associated Press, favoured by journalism and much of the web) and Chicago style (the Chicago Manual of Style, common in books and academia). Both capitalise the important words and lower-case the minor ones, but they draw the line differently — most notably on prepositions. AP lowercases prepositions of three letters or fewer and capitalises longer ones, while Chicago lowercases all prepositions regardless of length, so "A Walk Through the Woods" (Chicago) can become "A Walk Through the Woods" with a capital variation under AP depending on the word.

The practical lesson is to pick one style and apply it consistently rather than capitalising by instinct, which produces the ransom-note look of "The Best Way To Learn" (wrong — "to" should be lowercase) sitting next to "A Guide for the perplexed" (wrong the other way). A title-case tool encodes these rules so every heading on your site follows the same convention, which looks more professional and, for publications, actually matters to editors. When in doubt, AP style is the safer default for web content and marketing, since that is what most readers are unconsciously used to.

The Words That Trip Up Every Title Caser

The heart of title case is knowing which small words stay lowercase — and the list is more subtle than "short words". The standard minor words are the articles a, an, the; the short coordinating conjunctions and, but, or, nor, for, so, yet; and short prepositions at, by, in, of, on, to, up. Everything else — nouns, verbs, adjectives, adverbs, pronouns — gets capitalised. Crucially, even a minor word is always capitalised when it is the first or last word of the title, which is why "The" leads "The Cat in the Hat" but the interior "the" stays lower.

Two edge cases catch naive converters. First, short verbs like "Is", "Are" and "Be" must be capitalised even though they are tiny — they are verbs, not minor words, so "This Is It" is correct and "This is It" is wrong. Second, hyphenated compounds and words after a colon usually restart capitalisation ("Well-Being", "A Guide: The Basics"). A quality converter bakes in the minor-word list, the first/last-word rule and these exceptions, which is exactly why running text through a tool beats capitalising by hand — the machine never forgets that "is" is a verb or that the last word always gets a capital.

Frequently Asked Questions