What is sentence case?
Sentence case capitalizes the first letter of a sentence and keeps the remaining letters lowercase. This converter fixes sentence capitalization for paragraphs, messages, instructions, and body text. For heading formatting, use the Title Case Converter.
Improve readability
Converting all-caps writing to sentence case makes long text easier to scan. If you need every letter normalized to small letters without sentence capitals, use the Lowercase Converter.
How punctuation is handled
The converter lowercases the text first, then capitalizes the first letter and the first letter after a period, question mark, or exclamation mark. Proper names and specialized capitalization may need a manual review.
How this converter changes your text
| Before | After |
|---|---|
| HELLO WORLD. THIS IS TEST. | Hello world. This is test. |
| this is first. this is second. | This is first. This is second. |
Your text stays private
Conversion runs locally in your browser. Typed or pasted text is not sent to a server.