Sentence Case Converter
Turn ALL CAPS notes or messy drafts into sentence case: capitalize the first letter of each sentence and lower-case the rest for natural reading flow.
Last reviewed: 2026-07-23
Processed locally in your browser. Nothing is sent to a server.
Character count: 0 · Word count: 0 · Line count: 0
How to use
- Paste your text into the input panel.
- Review the sentence-cased output.
- Copy or download the result.
Examples
Cleanup mixed casing
Input
HELLO world. this IS a TEST!
Output
Hello world. This is a test!
What sentence case does
Sentence case improves readability for paragraphs and messages. It does not apply proper-noun rules — verify names and titles manually if needed.
Frequently asked questions
Is my text uploaded?+
No. This tool processes your text locally in your browser.
Related guides
Learn more about this topic in our blog.
Guides
Sentence Case vs Title Case: Which Should You Use?
Same words, different capitalization. A practical guide to picking sentence case or title case for emails, headings, buttons, and social posts.
Tips
How to Fix Accidental Caps Lock Text
Typed with Caps Lock on? Paste into a case converter — sentence case for prose, lowercase for slugs. No retyping required.