Free Title Case Converter In APA, MLA, Chicago and AP at Once
Every academic style guide capitalizes titles differently, and none of them use the intuitive rule of capitalizing every word. This tool runs your title through APA, MLA, Chicago and AP simultaneously, plus a sentence-case pass, applying each guide's real preposition-length or part-of-speech rule rather than a single generic pattern. Acronyms, mixed-case terms and the word after a subtitle colon are handled correctly in every version, so you copy the row your venue actually requires.
Type a title above and every conversion appears here instantly: APA, MLA, Chicago, AP, sentence case and the basic transforms.
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How one title becomes four capitalized versions
Enter a title or heading
A paper title, a chapter heading, a headline, or a full list of reference entries, one per line.
Read the four outputs side by side
APA, MLA, Chicago, AP headline case and sentence case are generated together, so the differences between them are visible rather than assumed.
Copy the version you need
Each row carries its own copy control, so the version matching your venue's house style goes straight to your document.
What separates this title case converter from a blanket capitalize function
Every standard rendered together
No menu to configure first. APA, MLA, Chicago, AP and sentence case appear at the same time, which is the fastest way to see where two guides actually disagree on your exact wording.
Word-length and part-of-speech rules applied correctly
APA capitalizes a preposition once it reaches four letters, while MLA and Chicago keep every preposition lowercase regardless of length. Both rules are implemented as written, not approximated.
Acronyms and mixed-case terms preserved
DNA, ANOVA, mRNA, iPhone and similar terms keep their original letters in every style, including the sentence-case row.
Subtitles and hyphenated compounds handled
The word following a colon is capitalized as a new subtitle begins, and both halves of a major hyphenated compound are capitalized where the guide calls for it.
Why APA, MLA, Chicago and AP capitalize the same title differently
A title's capitalization looks trivial until four style guides return four different answers for the same string. APA sets its line at word length: a preposition of four letters or more, such as with or from, is capitalized, while a shorter one is not. MLA and Chicago instead sort by part of speech, keeping every preposition lowercase no matter how long it runs, so between and throughout stay down in the middle of a heading. AP, built for newspaper headlines, keeps its own short list of words that stay lowercase regardless of what the other two systems do.
Sentence case is where most of the actual mistakes happen. An APA reference list sets the article or chapter title in sentence case, capitalizing only the first word, the word after a colon, and any proper noun, while the journal name in the same entry keeps title case. Reversing those two conventions inside one reference is one of the corrections a copyeditor makes most often, and it is mechanical enough that a converter should carry the burden rather than a writer holding four rulebooks in their head. A tool cannot detect that a lowercase word is a surname, so a manual check of proper nouns still belongs at the end.
A generated document adds its own version of the problem. Headings drafted by a language model often shift between capitalization patterns from one section to the next. Running every heading through one style in a single pass removes that inconsistency at the structural level. The sentence-level equivalent, evening out phrasing and rhythm rather than capitalization, is what the TextPulse humanizer handles once the headings themselves are settled.
Who uses the title case converter
Graduate students preparing a thesis title
Match the department's required style without memorizing four separate rulebooks, and catch reference-list entries that need sentence case instead.
Researchers formatting a manuscript
Paper titles and headings in one guide's title case, article titles in a reference list in sentence case: the exact pairing most journals require.
Editors bringing chapters into line
Contributor drafts arrive capitalized inconsistently; running each heading through one style closes the gap before layout.
Marketing and web writers
Hold headlines, subject lines and page titles to AP or a house style without checking a manual for every short word.
The headings are consistent now.
The paragraphs under them still need a pass.
Capitalization is a formatting rule with one correct answer per style guide. Sentence rhythm and word choice are a judgment call a rule cannot make. The TextPulse humanizer works through the prose under your headings, adjusts phrasing and pacing across the full document, and returns every change as a tracked edit with citations left in place.