Capitalize Sentences & Case Converter

Choose a case mode and your text is transformed instantly. Supports sentence case, title case, UPPER, lower, and toggle.

Input
Result

Text Case Modes Explained

Sentence Case

Capitalizes the first letter after a period, exclamation mark, or question mark, and lowercases everything else. Use this to quickly fix pasted text that's ALL CAPS or has random capitalization — it produces naturally readable prose.

Title Case

Capitalizes the first letter of every word. Use for headlines, headings, book titles, and article titles. Note that strict AP or Chicago style title case has additional rules (articles, short prepositions, and conjunctions are lowercased unless they start the title), but for most purposes this simple form works well.

UPPER CASE

Converts every letter to uppercase. Useful for headings that should be ALL CAPS by design, or for generating text that needs to match an all-caps input field.

lower case

Converts every letter to lowercase. Useful for normalizing inconsistent capitalization before further processing or for informal writing styles.

tOgGlE CaSe

Alternates the capitalization of each character. Produces a distinctive visual pattern sometimes used in meme text or to visually mark sarcasm.

Compare Text

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Alphabetize List

Sort your text into alphabetical order.

Word Counter

Count words after formatting your text.

Capitalize Sentences FAQ

Sentence case capitalizes only the first letter of each sentence, leaving all other words lowercase (unless they are proper nouns). Example: "the quick brown fox." → "The quick brown fox."

Title case capitalizes the first letter of every word. Example: "the great gatsby" → "The Great Gatsby". Note that strict title case has rules about prepositions and articles, but this tool applies simple word-by-word capitalization.

Toggle case inverts the capitalization of every character — uppercase becomes lowercase and lowercase becomes uppercase. Example: "Hello World" → "hELLO wORLD". Useful for stylistic or decorative text.