Sentence Case Converter is a free online tool that formats text into sentence case, capitalizing the first letter of each sentence while lowercasing the rest. No installation required — runs entirely in your browser.
Sentence case is a capitalization style where only the first word of a sentence and proper nouns are capitalized. It is the standard format for body text, emails, and general writing. This tool detects sentence boundaries using punctuation marks like periods, exclamation points, and question marks.
Sentence Case Converter
Convert text to sentence case instantly.
How to Use
- Paste or type your text into the input field
- Click the Convert button
- The tool will instantly apply sentence case formatting
- Copy the converted output if needed
Example
Input
HELLO WORLD. HOW ARE YOU? I AM FINE!
Output
Hello world. How are you? I am fine!
FAQ
- What is sentence case?
- Sentence case capitalizes only the first letter of each sentence and proper nouns, leaving all other letters lowercase.
- Is this tool free?
- Yes, it is completely free with no registration required.
- Does this tool run in the browser?
- Yes, all processing happens locally in your browser with no data sent to a server.