Title case converter. All six style guides, live.
Type your title once. See AP, Chicago, MLA, APA, NYT, sentence-case renderings side-by-side. Each style has its own rules about which short words stay lowercase — pick the one that matches your publication.
Type your title once. Every style-guide rendering appears live. Click any card to copy. Each card lists the rules it applied so you can see why a borderline word was capitalized or not. Browser-only.
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Six guides. Different prepositions.
AP Stylebook. Newspaper journalism. Lowercase articles, coordinating conjunctions, and prepositions of three letters or fewer (at, by, in, of, on, to, up). Capitalize prepositions of four or more letters (with, from, into, over). Always capitalize the first and last words regardless of part of speech. Optimised for headline scanning at speed.
Chicago Manual of Style. Book publishing default. Lowercase articles, all prepositions regardless of length, coordinating conjunctions, and 'to' in an infinitive. The most consistent rule because length doesn't enter into it — every preposition stays down. Used by the University of Chicago Press, most US trade publishers, and many academic journals.
MLA. Humanities academic style. Similar to Chicago — lowercase articles, all prepositions, coordinating conjunctions. The differences from Chicago are subtle and mostly involve handling of compound words and hyphenated terms. Used in literature, language, and arts academic publishing.
APA 7th edition. Sciences and psychology. The 4-letter rule: capitalize any word of 4+ letters regardless of part of speech, lowercase short conjunctions and prepositions. So 'with' is capitalised but 'in' is not. Used in psychology, social sciences, education, business research papers.
New York Times. Headline style for The New York Times and many US dailies. Cap prepositions of 4+ letters (Above, Below, Through). Lowercase short prepositions (at, by, in). Lowercase articles and conjunctions. Similar to AP but with slightly different preposition handling.
Sentence case. Capitalize the first word only, plus proper nouns. The modern web default — Material Design, GitHub, Linear, Notion, most modern web publications all use sentence case for headings. Reads as more humble, easier to scan at small sizes, less shouty than title case. Higher email subject open-rate per Litmus testing.
Four jobs this tool covers.
Job 1: Match a publication's house style. Submitting an article to The Atlantic? Their style guide is closer to Chicago. Pitching to The Wall Street Journal? Closer to AP. Open-source documentation? Sentence case. Type the title once, copy the rendering that matches.
Job 2: Audit existing content. Run your own article titles through and check which guide they're closest to. If your CMS has 200 articles in inconsistent casing — half AP, half Chicago, some sentence case — pick one, run a script to normalise, and ship a consistent house style. Pair with our Character Counter for the length-cap side of the audit.
Job 3: Modernise to sentence case. If you're considering the migration from title case to sentence case across your blog, run sample titles through to see what the new house style looks like. Most modern brands have made this switch in the last five years — sentence case reads as warmer and more confident than title case. The all-caps option is also useful for testing how a tagline reads at hero scale.
Job 4: SEO title tag formatting. Some SEOs argue title case improves CTR (more visual emphasis); others argue sentence case improves it (reads as humble and trustworthy). The right answer depends on the brand and category — DTC brands often test better with sentence case, B2B with title case. Pair with our Title Tag Checker for SERP-pixel-width verification.
Six questions users ask.
How do AP, Chicago, MLA, and APA differ?
All four agree on the basics — capitalize the first and last words, capitalize most content words, lowercase articles (a, an, the). The differences are in handling prepositions and conjunctions. AP keeps prepositions of 3 letters or fewer lowercase (in, of, on, at) and capitalizes anything 4+ (with, from, into). Chicago lowercases ALL prepositions regardless of length unless they're functioning as adverbs. MLA lowercases all prepositions, articles, and coordinating conjunctions. APA capitalizes major words and any word of 4+ letters; lowercases short conjunctions and prepositions. The differences mostly matter for borderline cases — most short titles render identically across guides.
When do I use sentence case instead?
Sentence case (only the first word capitalized, plus proper nouns) has overtaken title case in most modern web publishing. It reads as more humble, less shouty, easier to scan at small sizes on mobile. Use sentence case for: blog headlines (most modern publications now), button labels, navigation items, modal titles, email subject lines (slightly higher open rate per Litmus testing). Use title case for: book titles, journal article titles, official document headings, anywhere a publication style guide explicitly requires it.
Why does each guide differ?
The English language has no standard title-case rule, so style guides each codified their own conventions. AP Stylebook (newspaper journalism) optimised for clarity and brevity in headlines. Chicago Manual of Style (book publishing) prioritised consistency across long-form prose. MLA (academic humanities) has different rules. APA (psychology, sciences) has different rules again. The differences are arbitrary in the sense that no single rule is correct — they're traditions encoded by each publisher's house style. Match the rule book your publication uses.
What's special about hyphenated and compound words?
Most style guides cap both halves of a hyphenated compound when each half could stand alone (Twenty-First, Self-Service). Don't cap the second half if it's a prefix or suffix that can't stand alone (e-Book, Co-op). Open compounds (two separate words) follow normal rules — both treated as independent words. We render the most common convention; for borderline cases, your house style guide may differ. Edit manually after if needed.
Will it preserve proper nouns?
We don't have a proper-noun dictionary, so brand names, acronyms, and stylized lowercase names (iPhone, eBay, gPhone) are best preserved by typing them in their canonical form first — we never down-case anything that's already mixed-case in your input. We treat anything you typed as ALL CAPS (NASA, FBI) as an acronym and preserve it. The general rule: type the title in your input the way it should look, with brand names capitalized correctly; the converter handles the title-case overlay around them.
Is the text I paste sent anywhere?
No. All conversions happen in your browser. The title is never uploaded to Digital Heroes servers, never logged. The page is static HTML; the only network request is the initial page load. Safe for unpublished article titles, internal naming proposals, or anything else you'd not want to ship to a third party.