Title Case Converter

How to use

1. 1Paste or type your title in the input on the left, or click one of the sample titles to load an example.
2. 2Read the seven side-by-side results: AP, Chicago, MLA, APA, NYT, Wikipedia (sentence case), and plain Every-Word title case.
3. 3Each result panel shows the style's short rule blurb so you can see why a word was capitalized or lowercased.
4. 4Click the Copy button next to the style you need for your publication, blog post, paper, or headline.
5. 5Acronyms in all caps (NASA, HTML, SEO) and subtitles after a colon are handled automatically, so you do not need to pre-format the input.

About this tool

Title Case Converter applies the actual rules of the major English style guides to your title, all in your browser, with no signup. Type or paste a working title and the tool shows seven side-by-side results: AP Stylebook (capitalize words of four or more letters, lowercase short articles, conjunctions, and prepositions), Chicago Manual of Style (lowercase articles, coordinating conjunctions, and prepositions of any length between the first and last word), MLA Handbook (very close to Chicago, with the same article and short-word lowercase rules), APA 7th edition headline-style (lowercase only articles, conjunctions, and prepositions of three letters or fewer), New York Times (AP-like, with prepositions of four or more letters capitalized), Wikipedia (sentence-case article titles where only the first word and proper nouns are capitalized), and a plain Every-Word title case for systems that demand it. Each style has its own small-word list built from the published guide, plus a length rule where applicable, and the first and last words are always capitalized regardless of length. Subtitles after a colon are treated as their own title, so the first word after a colon also gets capitalized, which is how every guide handles 'Title: A Subtitle About Something'. Hyphenated compounds such as 'state-of-the-art', 'twenty-first', or 'mother-in-law' are split into segments and each segment is processed by the same rules so the result reads correctly in print and on the web. All-uppercase acronyms (NASA, USA, HTML, SEO, FBI, NBA, IBM, NSA, CSS, JSON) are detected and preserved verbatim, so a working title like 'guide to SEO and css for mla papers' will not lose its acronyms during the conversion. The output panel shows every style at once with a short blurb describing the rule that produced it and a one-click copy button per result, so you can grab whichever version matches the publication or assignment you are writing for. Useful for journalists writing headlines under house style, copy editors who switch between AP and Chicago in a single day, content marketers preparing blog and YouTube titles for search, students writing MLA or APA papers, book and movie title pages, social-media post titles that need to look professional, and anyone whose CMS exports lowercase strings that need to be cleaned up for publication. Everything runs locally in your browser using deterministic string transformations, so the working titles, headlines, and confidential draft material you paste here never leave your device.

Free to use. Works in your browser. No signup, no login.