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Title Case Converter

Convert headlines to AP, APA, Chicago, MLA, NYT, or Wikipedia style

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About this tool

Title Case Converter applies practical, style-informed capitalization rules for AP, APA (7th edition), Chicago (17th), MLA (9th), New York Times, and Wikipedia sentence case. The styles differ on short words and punctuation: Chicago and MLA generally lowercase articles, conjunctions, and prepositions, while AP and APA capitalize many words of four or more letters. Choose a style and the output updates live; the comparison panel shows all six results for the same input. Because proper-noun and house-style exceptions require editorial judgment, review the result before publication.

Why use it

  • Six Style Guides Built In: AP, APA, Chicago, MLA, NYT, and Wikipedia — pick the one your editor, journal, or CMS requires.

  • Live Comparison Across Styles: See exactly how the same headline changes between AP, APA, Chicago, MLA, NYT, and Wikipedia in one view.

  • Smart Word Detection: Articles, conjunctions, and prepositions are recognized and lowercased per each style's rules — not blindly title-cased.

  • Acronym Preservation: All-caps acronyms like 'NASA', 'PDF', or 'API' are kept upper-case rather than mangled into 'Nasa'.

  • Hyphenated Word Handling: Each segment of a hyphenated word is capitalized correctly — 'state-of-the-art' becomes 'State-of-the-Art' in Chicago.

  • Instant Browser-Side: No upload, no API call. Your draft headlines never leave the page.

How to use

  1. Type or paste your headline into the input box.
  2. Choose a style guide from the dropdown — Chicago is the default for general use.
  3. Read the title-cased output below — it updates live as you type.
  4. Compare how the same headline looks across all six styles in the comparison panel.
  5. Click 'Copy' to send the active output to your clipboard.
  6. Click 'Use as input' to feed the output back as the next input — useful for chaining tweaks.

When it helps

  • Writing an academic paper that requires a specific style guide (APA, Chicago, MLA).
  • Drafting blog post titles for a CMS that enforces AP or NYT capitalization.
  • Editing a news article and matching the publication's house style.
  • Comparing how a headline looks under different journalistic conventions before publishing.
  • Producing a chapter or section heading that follows a publisher's manuscript guidelines.
  • Cleaning up user-generated headlines (e.g. from a forum or contributor system) to a single style.

Examples

AP vs Chicago

Input

the way of the warrior

Expected result

AP: The Way of the Warrior · Chicago: The Way of the Warrior

APA after colon

Input

a study in scarlet: the early years

Expected result

APA: A Study in Scarlet: The Early Years

Acronym preserved

Input

the future of AI in healthcare

Expected result

Chicago: The Future of AI in Healthcare

Tips

  • If you don't know which style to use, default to Chicago — it's the most common for books, blogs, and general writing.
  • AP's 'capitalize words 4+ letters' rule means short prepositions like 'with', 'from', 'into' will be capitalized — different from Chicago.
  • APA capitalizes the first word after a colon. Chicago does too, but only in book titles, not subtitles in running prose.
  • When converting between styles, paste the lowercase version, not the original — odd capitalization in the input can confuse heuristic detectors.
  • Wikipedia uses sentence case, not title case — only the first word and proper nouns are capitalized. The tool can't detect proper nouns automatically; review the output.

Frequently Asked Questions

Why does 'Of' get capitalized in AP but not in Chicago?
AP capitalizes any word four letters or longer regardless of part of speech. 'Of' is two letters, so AP lowercases it. Chicago lowercases 'of' specifically because it's a preposition — preposition length is irrelevant in Chicago.
Which style should I use?
If your editor, journal, or CMS specifies a style, follow that. Otherwise: AP for news writing, APA for psychology and social sciences, MLA for humanities essays, Chicago for books and general non-fiction, NYT-style for opinion blogs and similar publications, Wikipedia (sentence case) only for Wikipedia and academic sites that mimic it.
Why are acronyms like NASA and API kept all-caps?
The tool detects words that are 2-5 characters and entirely uppercase in your input and treats them as acronyms — leaving them upper-case in every style. Type acronyms in caps to keep them caps.
How are hyphenated words handled?
Each segment is title-cased independently. So 'state-of-the-art' becomes 'State-of-the-Art' in Chicago — the article and prepositions inside the hyphenated phrase are still lowercased.
Does the tool capitalize proper nouns?
Only via the case of the input. Heuristic detection of proper nouns is unreliable, so the tool follows your input casing for any word that looks like a regular common word. Sentence-case (Wikipedia) output should be reviewed by hand.
What about subtitles after a colon?
APA and Chicago capitalize the first word after a colon. AP, MLA, and NYT do not have an explicit colon rule — they treat a subtitle like a continuation. The tool implements the colon rule for APA and Chicago.
Can I convert multi-line text or paragraphs?
Yes. The tool processes each line independently — first/last-word rules apply per line, not across the whole input. This matches how chapter headings or stacked headlines are usually formatted.
Why is 'Is' capitalized in some styles but not others?
'Is' is a verb (a 'major word'), so most title-case styles capitalize it. The exception is when it's a short word and a particular style emphasizes lowercasing all sub-four-letter words — but in our six styles, 'is' is always capitalized as a major word.

Explore the category

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Glossary

AP Style
Associated Press Stylebook. Used by most US news publications. Capitalizes the first and last word, plus all words four letters or longer.
APA Style (7th ed.)
American Psychological Association style, used in psychology and social-science journals. Capitalizes major words and any word four letters or longer; also capitalizes the first word after a colon.
Chicago Manual of Style (17th ed.)
The Chicago Manual is the standard for books, scholarly journals, and many magazines. Capitalizes first and last words plus all major words; lowercases articles, coordinating conjunctions, and prepositions of any length.
MLA Style (9th ed.)
Modern Language Association style, used in humanities. Similar to Chicago but lowercases articles, prepositions, and coordinating conjunctions; capitalizes first and last words and all principal words.
New York Times
The NYT house style closely follows Chicago but capitalizes prepositions of four or more letters. Used by NYT and many other major US dailies.
Wikipedia (sentence case)
Wikipedia article titles use sentence case: only the first word and proper nouns are capitalized. Included here for comparison rather than headline use.