Sentence case capitalizes only the first word and proper nouns. Title case capitalizes the main words of a heading, and the exact rules depend on the style guide.
Side by side
| Sentence case | Title Case | |
|---|---|---|
| Example | How to count words in text | How to Count Words in Text |
| Common in | Modern web headings, UI text | Book titles, formal headings, AP/Chicago styles |
| Rule complexity | Simple | Varies by style guide |
When to use which
Pick one for your site and use it consistently. For strict headline rules, use a title case converter that supports AP, Chicago, MLA or APA.