Convert text to sentence case
Capitalise the first letter of each sentence.
What to know
The first letter of the text and the first letter after each full stop, question mark or exclamation mark are capitalised. Everything else is lowercased, so proper nouns will need fixing by hand.
Questions
Is anything uploaded to a server?
No. Every tool on this site runs inside your browser using standard web APIs. There is no upload, no account, no logging and no server holding your data afterwards. You can confirm it by opening your browser's developer tools and watching the network tab stay empty while you work.