Title Case Converter — AP, Chicago, APA, MLA & Wikipedia Styles

What is Title Case?

Title case (also called headline case) is a capitalization style where major words in a title are capitalized while minor words — articles (a, an, the), coordinating conjunctions (and, but, or, nor, for, yet, so), and short prepositions (of, in, on, at, to) — are lowercased. The exact rules differ between style guides. AP and APA lowercase only prepositions of 3 letters or fewer, so "About Us" stays capitalized. Chicago and MLA lowercase all prepositions regardless of length, so it becomes "about". Wikipedia's Manual of Style is a middle ground (≤4 letters). This tool applies all five rule sets correctly, always capitalizes the first and last word (the two positions all guides agree on), and preserves all-uppercase acronyms.

How to convert text to title case online

1. 1Paste your title (or a list of titles, one per line) into the input pane.
2. 2Pick a style: Chicago, AP, APA, MLA, Wikipedia, or Simple.
3. 3The output pane updates instantly with correctly capitalized titles.
4. 4Copy the result — the tool preserves your original punctuation, spacing, and any all-caps acronyms.

Use Cases

Key Concepts

Minor words

Articles, coordinating conjunctions, and short prepositions — the words most style guides prefer to keep lowercase inside titles.

Preposition-length threshold

The number of letters below which prepositions are lowercased. AP/APA use 3, Wikipedia uses 4, Chicago/MLA use no threshold (all prepositions lowercase).

Sentence case

A different capitalization style where only the first word (and proper nouns) is capitalized. Common in British publications and modern web copy.

Tips & Best Practices

• ▸Always capitalize the first and last word of a title — every major style agrees on this. The tool enforces it automatically.
• ▸After a colon or dash inside a title, capitalize the first word of the subtitle. The tool handles this.
• ▸Acronyms (2+ all-uppercase letters) are preserved so "HTML and CSS" doesn't become "Html and Css". Disable via 'Preserve acronyms' if you want strict lowercasing.
• ▸Chicago and MLA are the two strictest guides for lowercasing — if in doubt, Chicago is a safe default for U.S. publishing.
• ▸For social-media copy, sentence case (only first word + proper nouns capitalized) often reads better than title case. Use the Case Converter tool for that.