Sentence Case & Title Case Converter
Fix ALL-CAPS paragraphs and capitalize headlines by style-guide rules, with the options you control
Built for writing rather than variable names. Sentence case mode rewrites a passage so each sentence starts with a capital after a period, question mark, or exclamation point — and an optional toggle forces the remaining letters lowercase, which is what rescues text pasted in ALL CAPS. Title case mode follows the convention writers expect: minor words such as a, the, of, in, and with stay lowercase, while everything else is capitalized, and one checkbox turns that off when your style guide capitalizes every word. Apostrophes are handled, so don't stays don't. snake_case and kebab-case are included for slugs. Need PascalCase, CONSTANT_CASE, or plain UPPERCASE with no options? The Case Converter covers all nine formats.
🔒 Everything runs 100% in your browser. Your files and input are never uploaded to any server.
How to use
- Type or paste the text you want to convert into the input box.
- Pick a conversion mode: sentence case, title case, snake_case, or kebab-case.
- Check any options you need, such as forcing the remaining letters to lowercase or capitalizing every word.
- Review the converted text in the output box and grab it with the copy button.
FAQ
- How are articles and prepositions handled in title case?
- By default, short words like a, the, and, of, and in stay lowercase unless they're the first word. Turn on "capitalize every word" and every single word gets a capital letter, no exceptions.
- Does it work with non-Latin text like Korean?
- Sentence case and title case recognize Korean syllables and handle the first character after punctuation. snake_case and kebab-case split Latin letters, digits, and Korean characters into words and join them in lowercase.
- Is my text stored on a server?
- No. Every conversion happens instantly inside your browser, and nothing is transmitted or saved anywhere.