Title Case vs. Sentence Case: When to Use Each

Title Case and Sentence case are both "correct" — the right choice depends on the format, not a universal grammar rule.

Title Case capitalizes most words: nouns, verbs, adjectives, and adverbs, while typically leaving short articles, conjunctions, and prepositions (a, the, and, of, in) lowercase unless they start the phrase. Example: "How to Write a Strong Password You Can Actually Remember." It’s the standard for headlines, book titles, and navigation menus.

Sentence case capitalizes only the first word of the sentence and any proper nouns, exactly like normal prose. Example: "How to write a strong password you can actually remember." It’s the standard for body text, and it’s increasingly common for headlines and UI text too — many major style guides (including a lot of modern product and design teams) have shifted toward sentence case because it reads faster and feels less "shouty."

A simple rule of thumb: use Title Case for something that functions like a label or a title (page titles, book titles, formal headlines). Use Sentence case for anything that functions like a sentence (body copy, most email subject lines, most UI microcopy, most modern blog headlines).

Mixing the two inconsistently within the same document is usually what reads as unpolished — pick one convention per context (e.g., Title Case for all your H1s, Sentence case for everything else) and stay consistent.

Our Case Converter switches text between UPPERCASE, lowercase, Title Case, Sentence case, and camelCase in one click — useful for cleaning up text pasted from somewhere with different formatting conventions.