Sentence case converter
Fix messy capitalization. Convert text so each sentence starts with a capital and the rest is lowercase.
How to convert to sentence case
Paste your text and tap Sentence case. The first letter of each sentence is capitalized and the rest lowercased, so HELLO. hOw ARE you becomes Hello. How are you. It's the quickest way to rescue text that arrived in the wrong case — pasted from a spreadsheet, typed with caps lock on, or copied from a source that shouted.
Why sentence case is the modern default
Most contemporary style guides, product interfaces and design systems prefer sentence case for headings, buttons and UI labels because it reads more naturally, scans faster, and handles brand names and acronyms more gracefully than title case — Apple, Google and many major design systems write their interface text this way. It also plays better with proper nouns: because the rest of the sentence stays lowercase, a name that should be capitalized stands out instead of blending into a line where every word is capitalized.
A note on names and acronyms
Since the tool lowercases everything after the first letter of each sentence, you may need to re-capitalize proper nouns and acronyms by hand. For headlines and titles, title case is the traditional choice; for emphasis, use uppercase.