What is the difference between AP and Chicago title case?

AP style capitalizes words of four or more letters, while prepositions, articles, and short conjunctions under four letters stay lowercase. Chicago style is similar but keeps all prepositions lowercase regardless of length, and capitalizes the first and last word of every title unconditionally.

Does APA title case differ from Chicago?

Yes. APA style capitalizes words of four or more letters just like AP, but it also always capitalizes major words (nouns, verbs, adjectives, adverbs). Words of three letters or fewer used as prepositions or conjunctions remain lowercase.

Are the first and last words always capitalized?

Yes — all three style guides require the first and last word of a title to always be capitalized, regardless of what part of speech they are.

Does the tool handle hyphenated words?

Yes. Each part of a hyphenated compound is treated as an independent word and capitalized according to the selected style guide's rules.

Is my text sent to a server?

No. All processing runs directly in your browser with JavaScript. Nothing is uploaded or stored anywhere.

Title Case Converter

Paste any text and instantly convert it to properly capitalized title case using AP, Chicago, or APA style rules.

Input Text

Style Guide

Capitalizes words of 4+ letters; keeps short prepositions, articles, and conjunctions lowercase.

Title Case Result

Your converted title will appear here

Style Guide Quick Reference

Rule	AP	Chicago	APA
Articles (a, an, the)	Lowercase	Lowercase	Lowercase
Short prepositions (<4 letters)	Lowercase	Lowercase	Lowercase
Long prepositions (4+ letters)	Capitalized	Lowercase	Capitalized
Coordinating conjunctions	Lowercase (and, but, or, nor, for, yet, so)	Lowercase (and, but, or, nor, for, yet, so)	Lowercase (and, but, or, nor, for, yet, so)
First & last word	Always capitalized	Always capitalized	Always capitalized

Summary

The Title Case Converter applies professional capitalization rules from three major editorial style guides — AP, Chicago, and APA — to any text you provide. Each style has different rules about which short words (prepositions, articles, conjunctions) remain lowercase versus capitalized. The tool processes your input entirely in-browser with no data sent to any server.

How it works

Paste or type your text into the input field.
Select the style guide: AP, Chicago, or APA.
The converted title appears instantly in the output panel.
Click "Copy" to copy the result to your clipboard.
Switch between styles at any time to compare the outputs.

Use cases

Format blog post headlines to match publication style guides.
Capitalize academic paper titles per APA guidelines.
Prepare press release headlines in AP style.
Create properly cased chapter titles in Chicago style.
Quickly check capitalization rules for any title.
Standardize headings across long documents.

Frequently Asked Questions

Last updated: 2026-05-23 · Reviewed by Nham Vu