Six case styles, one click
UPPERCASE for headings and emphasis. lowercase to reset shouty text. Title Case for headlines and book titles. Sentence case for normal writing. camelCase and snake_case for programmers naming variables.
The classic use case
You typed a whole paragraph with Caps Lock on. Instead of retyping, paste it here, hit "Sentence case," and copy it back. Ten seconds saved is ten seconds earned.
Conversion happens locally in your browser — your text never leaves your device.