Sentence Case Converter Privacy: All processing runs locally

How It Works

The Sentence Case converter transforms your text so that only the first letter of each sentence is capitalized, while all other letters are converted to lowercase. The tool also keeps the pronoun "I" uppercase, as required by English grammar rules.

Sentence boundaries are detected using the standard terminators: period (.), exclamation mark (!), and question mark (?). After any of these characters followed by whitespace, the next letter is automatically capitalized.

Common use cases include:

• Converting ALL CAPS text into readable sentences
• Normalizing text from various sources into standard sentence format
• Cleaning up user-generated content for display
• Preparing text for formal documents and emails
• Fixing text that was accidentally typed with Caps Lock on

Note that this tool cannot detect proper nouns (names of people, places, brands) since that would require natural language understanding. For those cases, you may need to manually adjust the output. All processing runs entirely in your browser, ensuring complete privacy.