Example
THE MEETING MOVED TO FRIDAY. i'll send the new invite TODAY! can everyone make it?
The meeting moved to friday. I'll send the new invite today! Can everyone make it?
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.