Title Case Formatter Calculator
Convert text to title case, sentence case, camelCase, snake_case, and more, following AP, Chicago, APA, or MLA capitalisation rules for small words.
Title Case Formatter Calculator
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Formula: Capitalize first/last word + major words; lowercase articles, conjunctions, short prepositions
Worked example — How to Build a Successful Startup in the Digital Age
Formula
Capitalize first/last word + major words; lowercase articles, conjunctions, short prepositions
Title case capitalization follows style guide rules: always capitalize the first and last words, capitalize all major words (nouns, verbs, adjectives, adverbs), and keep articles, coordinating conjunctions, and short prepositions lowercase. The exact rules vary by style guide (AP, Chicago, APA, MLA).
Worked Examples
Example 1: Blog Post Title (AP Style)
Problem:Convert 'how to build a successful startup in the digital age' to AP-style title case.
Solution:Apply AP rules: - Capitalize first word: 'How' - 'to' is a preposition (2 letters) → lowercase - 'Build' → capitalize (verb) - 'a' → lowercase (article) - 'Successful' → capitalize (adjective) - 'Startup' → capitalize (noun) - 'in' → lowercase (preposition) - 'the' → lowercase (article) - 'Digital' → capitalize (adjective) - 'Age' → capitalize (last word + noun)
Result:How to Build a Successful Startup in the Digital Age
Example 2: Programming Variable Names
Problem:Convert 'user account settings page' to camelCase, PascalCase, snake_case, and kebab-case.
Solution:camelCase: join words, capitalize all except first → userAccountSettingsPage PascalCase: join words, capitalize all → UserAccountSettingsPage snake_case: join with underscores, all lower → user_account_settings_page kebab-case: join with hyphens, all lower → user-account-settings-page
Result:camelCase: userAccountSettingsPage | snake_case: user_account_settings_page
Frequently Asked Questions
What are the rules for AP style title case?
AP (Associated Press) style title case follows specific rules for capitalizing titles and headlines. Capitalize the first and last word regardless of part of speech. Capitalize all major words including nouns, verbs (even short ones like 'Is' and 'Be'), adjectives, adverbs, and pronouns. Do not capitalize articles (a, an, the), coordinating conjunctions (and, but, or, nor, for, yet, so), or short prepositions (at, by, in, of, on, to, up) unless they are the first or last word. Capitalize prepositions of four or more letters (such as 'With,' 'From,' 'Into'). Hyphenated words in titles should have both parts capitalized unless the second part is a small word.
What is the difference between title case and sentence case?
Title case capitalizes the first letter of most or all words in a heading, following specific style guide rules about which small words remain lowercase. Sentence case capitalizes only the first letter of the first word and proper nouns, just like a regular sentence. For example: Title Case: 'The Quick Brown Fox Jumps Over the Lazy Dog' versus Sentence Case: 'The quick brown fox jumps over the lazy dog.' Sentence case is increasingly popular in modern web design and user interfaces because it feels more natural and less formal. APA style now recommends sentence case for reference list titles. Title case remains standard for book titles, newspaper headlines, and formal document headings.
How does Chicago Manual of Style title case differ from AP style?
While Chicago and AP styles share many similarities, they have key differences in title capitalization. Chicago style capitalizes prepositions of five or more letters, while AP uses four letters as the threshold. Chicago capitalizes the second part of a hyphenated compound if it is a noun, adjective, or other major word, while AP generally capitalizes both parts. Chicago keeps 'to' lowercase when it is part of an infinitive (to Run becomes 'to Run' in some interpretations). Chicago also has specific rules about capitalizing articles after colons in titles. Both styles agree on capitalizing the first and last words and keeping articles and short conjunctions lowercase.
When should I use different text cases in content writing?
Different text cases serve different purposes in content writing. Title Case is appropriate for book titles, article headlines, headings in formal documents, and product names. Sentence case works well for subheadings, UI labels, email subject lines, and social media posts due to its conversational tone. UPPERCASE should be used sparingly: for acronyms, legal warnings, or very short emphasis text (overuse feels like shouting). lowercase is occasionally used for branding purposes (e.g., some company names) but should be avoided in formal writing. camelCase and PascalCase are primarily for programming variable and function names. snake_case and kebab-case are used in programming and URL slugs respectively.
How do you handle special cases in title capitalization?
Special cases in title capitalization include several tricky scenarios. Hyphenated compounds: capitalize the first element and subsequent elements unless they are articles, prepositions, or coordinating conjunctions (e.g., 'Self-Paced Learning' but 'State-of-the-Art'). Words after colons: capitalize the first word after a colon in a title. Acronyms and initialisms: keep them in their standard form (HTML, NASA). Words with internal capitals: maintain the original capitalization (iPhone, eBay). Species names: italicize and follow scientific convention. Prepositions used as adverbs or adjectives should be capitalized ('Turn Up the Volume' where 'Up' modifies the verb). Articles beginning proper nouns are capitalized ('The Hague').
How does APA title case differ from AP and Chicago?
APA applies title case to titles of works mentioned in running text and to headings, capitalising the first word, the first word after a colon or dash, and every major word of four letters or more, so articles and short prepositions stay lowercase. Current Chicago guidance is the sharper contrast: it lowercases prepositions whatever their length. Scope differs too, since APA asks for sentence case in the reference list, so one book title is capitalised two ways in a single manuscript.
What is the difference between camelCase and PascalCase?
Both remove the spaces between words and mark the boundaries with capitals. camelCase leaves the first word lowercase and capitalises each word after it, as in wordCountTotal, and is conventional for variables and function names in languages such as JavaScript and Java. PascalCase, also called upper camel case, capitalises the first word too, as in WordCountTotal, and is conventional for class, type and component names. Both are naming conventions, not grammar rules.
How should title case handle phrasal verbs such as Set Up or Log In?
The particle in a phrasal verb belongs to the verb, not to the prepositions, so it is capitalised even though the same word stays lowercase elsewhere. Write How to Set Up Your Account and Log In to the Portal, but keep the true preposition lowercase in Notes on the Portal. Automatic formatters work from a word list and cannot tell the two uses apart, so headlines containing up, on, in, out or off usually need a manual check.
What happens to text that is already typed in all capitals?
Most converters lowercase the whole string first and then re-capitalise according to the style rules, because there is no other way to know which capitals were deliberate. That destroys the casing of acronyms and brand names: NASA becomes Nasa, iPhone becomes Iphone, eBay becomes Ebay. If your headline contains initialisms or camel-cased brand names, convert first and restore those tokens by hand, or fix the source out of all caps before converting.
Why do publishers and search-facing headlines still favour title case?
Title case visually separates a heading from body text even when the surrounding typography is uniform, which helps a reader skimming a page or a results list find the entry point. It also signals that the string is the name of a work rather than a sentence about it. The trade-off is a more formal tone, which is why product interfaces and app labels have largely moved to sentence case for short functional strings.
References
Reviewed for accuracy by Daniel Agrici, Founder & Lead Developer · Editorial policy
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