Title Case Converter
Capitalize titles correctly for APA, Chicago, AP, MLA, and 5 more style guides. Click "Explain" to see why each word changed. Press ⌘↵ to copy.
Word-by-word explanation
Browse by style guide
What Is a Title Capitalizer
A title capitalizer converts any raw title or heading into the correctly capitalized form required by your style guide. Rather than memorizing every rule for every style, you paste your title, select a standard, and get a formatted result instantly. TitleCasePro's title capitalization tool supports all nine major styles used in academic, journalistic, and professional writing.
Title Capitalization Rules Vary by Style Guide
Each style guide has a distinct set of rules about which words to capitalize. APA lowercases all prepositions regardless of their length, so "between", "through", and "without" all stay lowercase in the middle of a title. Chicago takes a different approach: it lowercases only prepositions of four or fewer letters, so "About" and "Between" are capitalized. AP and NY Times capitalize any word of four or more letters. AMA capitalizes every single word — articles, prepositions, and conjunctions included.
These differences matter. A manuscript submitted to a psychology journal should follow APA title case rules. A news headline should follow AP. A legal citation should follow Bluebook. Using the wrong style guide creates inconsistency that signals unfamiliarity with the publication's standards.
Word-Level Explanations for Every Title
After converting a title, click "Explain" to see a word-by-word breakdown. Each word is shown alongside the specific rule that determined its capitalization. For example: "of — short preposition, lowercase per APA." This makes TitleCasePro useful not only as a conversion tool but as a learning resource for understanding why title capitalization works the way it does.
Compare Styles, Batch Convert, and More
If you are unsure which style to use, the comparison tool shows all nine results side by side for any title you enter. For bulk work, the batch capitalizer handles entire lists with CSV and TXT import and export. For text formatting beyond titles, the case converter handles 13 text case formats including camelCase, snake_case, and UPPERCASE.
Read the full rules for each style in the style guide reference, or jump directly to a per-style capitalizer below.
Frequently asked questions
Title capitalization is the practice of capitalizing specific words in a title or headline according to a set of grammatical rules. Most style guides capitalize principal words — nouns, verbs, adjectives, and adverbs — while lowercasing articles, short prepositions, and coordinating conjunctions unless they appear at the beginning or end of a title.
Title case is a capitalization style where the first letter of principal words is uppercase and minor words are lowercase. For example: "The Quick Brown Fox Jumps over the Lazy Dog." Exactly which words are capitalized depends on the style guide — APA, Chicago, AP, and MLA each have slightly different rules.
Title case capitalizes most major words in a title (e.g., "How to Write a Great Title"), while sentence case capitalizes only the first word and proper nouns (e.g., "How to write a great title"). Wikipedia and professional email subject lines typically use sentence case; academic and journalistic publications mostly use title case.
It depends on your field. Use APA for psychology and social sciences, Chicago for books and general publishing, AP for journalism and media, MLA for literature and language studies, AMA for medicine and health sciences, Bluebook for legal writing, NY Times for editorial journalism, Wikipedia for reference content, and Email for professional email subjects.
Yes. TitleCasePro fully supports APA 7th Edition title case, which capitalizes nouns, verbs, adjectives, and adverbs while lowercasing all prepositions, articles, and coordinating conjunctions regardless of length.
Yes. TitleCasePro supports Chicago Manual of Style (CMOS 17th Edition) title case. Chicago lowercases short prepositions of four or fewer letters and capitalizes longer prepositions like "About" and "Between."
Yes. TitleCasePro supports AP Stylebook title case, which capitalizes words of four or more letters and lowercases articles, short prepositions, and coordinating conjunctions.
Yes. TitleCasePro supports MLA Handbook (9th Edition) title case, which capitalizes all principal words and lowercases all prepositions regardless of length, along with articles and coordinating conjunctions.
Yes. The <a href="/compare" class="text-[var(--color-link)] hover:underline">Compare Styles</a> tool lets you enter any title and see it formatted in all 9 style guides — APA, Chicago, AP, MLA, Bluebook, AMA, NY Times, Wikipedia, and Email — simultaneously in one clean table.
Yes. The <a href="/tools/batch-capitalizer" class="text-[var(--color-link)] hover:underline">Batch Capitalizer</a> tool lets you paste a list of titles or import a file and convert all of them to your chosen style in one step.
Yes. The Batch Capitalizer accepts CSV and TXT file uploads. It reads one title per line and exports clean results as a TXT or CSV file for use in your workflow.
Yes. TitleCasePro is completely free to use. There is no account, no subscription, and no paywall on any of the tools.
Yes. After converting a title, click "Explain" below the output to see a word-by-word breakdown. Each word is shown alongside the exact rule that was applied — for example, "Short preposition — lowercase per Chicago §8.157."
Yes. All tools run entirely in your browser. No data is sent to a server, and nothing is stored externally. The tools work on any modern browser on desktop or mobile.
No. TitleCasePro has no ads inside the tool area. The capitalization tool, comparison view, batch tool, and all other tools are ad-free.