Sentence Case Converter
Paste or type your text to capitalize the first letter of every sentence instantly — no signup, nothing sent to a server.
How to use the sentence case converter
-
1
Paste or type your text
Drop your text into the left box, or start typing directly.
-
2
Read the converted result
The Sentence case result appears instantly on the right as you type.
-
3
Copy the result
Click "Copy result" to copy the converted text to your clipboard.
Example use cases
Cleaning up all-caps text
Convert text typed in all caps or Title Case back into normal sentence formatting.
Emails & messages
Fix casing on pasted text before sending a professional email or message.
Transcripts & notes
Reformat raw notes or transcripts into properly cased sentences.
Data cleanup
Normalize casing in a spreadsheet column or text field pasted from another source.
Frequently asked questions
How does the sentence case converter work?
The text is lowercased, then the first letter after the start of the text and after each ., !, or ? is capitalized, matching normal sentence formatting.
Does it handle abbreviations like "Mr." or "U.S." correctly?
Not always — since the tool splits sentences on ., !, and ?, abbreviations followed by a capital letter can be treated as a new sentence. Review the result for text with lots of abbreviations.
Is my text sent to a server?
No. The conversion happens entirely in your browser as you type — nothing is transmitted or logged.