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Sentence Case Converter

Capitalize the first letter of every sentence and line in your text, and make everything else lower case.

What this tool does

Capitalize the first letter of every sentence and line in your text, and make everything else lower case. You fill in these fields: Text. It shows sentence case.

Inputs

  • Text: Longer text, up to 100000 characters.

How to use

  1. Type the text.
  2. Read the result: sentence case. It appears once every required field has a valid value.
  3. Use the copy button to copy the text.

Where this comes from

Change the case of text. The letters of the text are rewritten in the chosen case style. Eleven styles are defined, each by its own stated rule. Source: The case mappings of the Unicode Standard for single letters. The list of small words, the rule for the end of a sentence and the way words are split are this operation's own, stated in full in its text.

Limitations

  • Sentence case cannot recognize proper nouns, so every capital that is not at the start of a sentence is lowered.
  • In Sentence case a full stop inside an abbreviation such as e.g. or Dr. followed by a space makes the next word start with a capital.
  • Sentence case treats only the English-style marks . ! ? and the ellipsis character as the end of a sentence.
  • In Sentence case the letter i on its own is always made a capital, so i.e. becomes I.e. and a list item labelled i becomes I. In other languages a word spelled i is capitalized too.
  • In Sentence case a quotation that ends in a full stop, exclamation mark or question mark counts as the end of a sentence, so the word after the closing quotation mark gets a capital even when the sentence carries on.
  • In Sentence case a sentence or line that starts with a digit, a dash or a bullet gets no capital.
  • Text longer than 100,000 characters is not accepted.

FAQs

Q: What gets a capital letter in Sentence case?
A: The first letter of the text, the first letter of each line, the first letter after a full stop, exclamation mark or question mark that is followed by a space, and the word I on its own. Opening quotation marks and brackets before that letter are skipped.
Q: What does Sentence case do to names and acronyms?
A: Every other capital is lowered, so a name such as Paris or an acronym such as NASA becomes paris or nasa. Capitalize those again by hand.
Q: Does Sentence case handle accented letters?
A: Yes. A sentence that starts with an accented letter such as é gets its accented capital É.
Q: Does Sentence case change spacing or punctuation?
A: No. Spaces, line breaks and punctuation stay exactly as you typed them.

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