Sentence Case Converter

How sentence case works

The converter lowercases your text, then capitalizes the first letter at the start of the text, at the start of each line, and after every period, question mark, or exclamation point. A lone “i” becomes “I”, including in contractions like I’m and I’ve.

What it won’t fix

It can’t tell which words are names, places, or brands, so “friday”, “toronto”, and “iPhone” come out lowercase. Read the result once and restore proper nouns by hand.

Changing case in Word, Google Docs, and Excel

Microsoft Word: select the text and press Shift+F3 to cycle through lowercase, UPPERCASE, and Capitalize Each Word, or use the Change Case (Aa) button on the Home tab, which also offers Sentence case. On a Mac, use Format › Change Case.

Google Docs: select the text, then choose Format › Text › Capitalization.

Excel and Google Sheets: use =LOWER(A1), =UPPER(A1), or =PROPER(A1), then paste the results back as values. For anywhere else, such as email, a CMS, or a form, paste your text into this converter.

When sentence case is the right choice

Sentence case is the default for ordinary writing: emails, reports, product descriptions, and most body text. It has also become the standard for headings in many places. Google’s and Microsoft’s style guides both recommend sentence case for interface text and headings, and APA style uses it for the titles of articles and books in a reference list.

It reads naturally because it matches how we write everything else. Readers recognize a word partly by its shape, and a heading in sentence case keeps those familiar shapes.

A quick workflow for text typed in capitals

1. Paste the text into the box above. 2. Copy the result. 3. Search the result for names, places, days, months, and brands, and capitalize them again. 4. If the text contains abbreviations such as “U.S.” or “Dr.”, check the word after them, because the period can look like the end of a sentence.