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Free · 9 style guides · No signup required

Professional title capitalization.

APA, Chicago, AP, MLA, and 5 more styles. See why each word changed. Compare all styles at once. Batch-convert hundreds of titles. No ads in the tool.

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Style Comparison

One title. Nine styles. Side by side.

Enter any title and instantly see how APA, Chicago, AP, MLA, and all other major style guides would capitalize it.

Style Result
APA
Chicago
AP
MLA
Bluebook
AMA
NY Times
Wikipedia
Email

Frequently asked questions

Title Capitalization Questions

Answers to the most common questions about capitalising words in titles and headings.

What Is TitleCasePro

TitleCasePro is a free, browser-based title capitalization tool built for writers, editors, students, journalists, and content teams who need accurate title case fast. It supports 9 major style guides — APA, Chicago, AP, MLA, Bluebook, AMA, NY Times, Wikipedia, and Email — and converts any title in real time as you type. Results appear instantly with no server round-trip, no signup, and no ads inside the tool.

Beyond simple capitalization, TitleCasePro explains every decision. Click "Explain" after a conversion and you see a word-by-word breakdown of the rule applied to each word — whether it was capitalised because it is a principal word, or lowercased because it is a short preposition or article per that style guide's rules.

Capitalize Titles Across 9 Style Guides

Title capitalization is not universal. Different style guides — the manuals published by organizations like the American Psychological Association, the University of Chicago Press, the Associated Press, and the Modern Language Association — each define their own rules for which words are capitalized in a title and which are not.

  • APA — Lowercases all prepositions regardless of length. Used in psychology, social sciences, and education.
  • Chicago (CMOS 17) — Lowercases prepositions of four letters or fewer. Used in book publishing and humanities.
  • AP — Capitalizes words of four or more letters. The standard for news and journalism.
  • MLA — Lowercases all prepositions regardless of length. Used in literature and language study.
  • Bluebook — Conservative title case used in legal citations and law review articles.
  • AMA — Capitalizes every word with no exceptions. Used in medicine and health sciences.
  • NY Times — Specific preposition rules based on the New York Times house style guide.
  • Wikipedia — Sentence case with proper noun capitalization. Used for encyclopedia-style content.
  • Email — Sentence case for professional email subject lines.

See Why Each Word Changed

Most title case tools just give you a result. TitleCasePro also explains it. After converting a title, click "Explain" to open a word-by-word table that shows the exact rule applied to each word. You will see why "the" stayed lowercase, why "Between" was capitalized, and why "NASA" was preserved unchanged.

Compare Title Capitalization Styles Side by Side

The Compare Styles tool shows all nine style guide results in a single table. Enter one title and immediately see APA, Chicago, AP, MLA, Bluebook, AMA, NY Times, Wikipedia, and Email versions side by side.

Batch Convert Titles From CSV or TXT

The Batch Capitalizer handles large lists at once. Paste titles one per line, or import a CSV or TXT file. Select your style guide, and every title converts instantly. Export results as TXT or CSV.

Convert Text Into 13 Case Formats

The Case Converter supports 13 output modes: UPPERCASE, lowercase, Sentence case, First Letter Case, aLtErNaTiNg, tOGGLE, camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE, and dot.case — all displayed simultaneously.

Who Uses TitleCasePro

  • Students and academics formatting essays and research papers in APA or MLA style.
  • Journalists and editors applying AP or NY Times style to headlines.
  • Book authors and publishers following Chicago title case for chapters and headings.
  • Medical and health writers formatting article titles in AMA style.
  • Legal writers applying Bluebook citation title case.
  • Content strategists and SEO writers formatting blog titles and meta titles consistently.
  • Email marketers writing professional subject lines in sentence case.
  • Developers converting between camelCase, PascalCase, snake_case, and other code naming conventions.