Title Case Guide
Format headlines correctly and understand why AP and Chicago capitalize words differently.
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Input
Choose a style
Output
The Quick Brown Fox Jumps Over the Lazy Dog — a Title Case Example
Capitalization rules
AP vs Chicago
Both styles always capitalize the first and last words.
AP Style
- Capitalize principal words
- Capitalize prepositions with 4+ letters
- Lowercase short articles and conjunctions
- Capitalize all forms of “to be”
Chicago Style
- Capitalize nouns, pronouns, verbs, and adjectives
- Lowercase all prepositions regardless of length
- Lowercase articles and coordinating conjunctions
- Capitalize all forms of “to be”
Clear answers
Frequently asked questions
Yes. “Is” is a form of the verb “to be,” and both AP and Chicago capitalize it in titles.
Quick reference
Title case rules at a glance
| Mode | Best for | Example |
|---|---|---|
| AP | Prepositions 4+ letters | A Walk Through the Park |
| Chicago | All prepositions lowercase | A Walk through the Park |
| Both | Forms of “to be” | Why It Is Important |
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