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Published: February 2026 · 5 min read When to utilize sentence case and title case is one of the most frequent writing questions. Whether you are writing a product name, a blog post headline, an email subject line, or a social media caption, proper capitalization helps your writing seem polished and formal. This tutorial provides examples to properly clarify the differences. What is Title Case? The first letter of each key word in a sentence is capitalized in title case. Unless they are the initial word, minor words like "a," "an", "the", "and", "but", "or", "in", "on," and "at" are usually kept lowercase. Example in title case: How to Build a Website in 2026 What is Sentence Case? Only the first letter of the first word and any proper nouns are capitalized in sentence case. All other letters remain lowercase. When creating a regular sentence, you use the same capitalizati...