Sentence Case Converter
Convert any text to sentence case. Capitalize the first letter of each sentence while keeping the rest lowercase.
About This Free Online Sentence Case Converter
Our free online Sentence Case Converter transforms your text to proper sentence case: the first letter of each sentence is capitalized while all other letters are lowercased. Unlike simple case converters, this tool intelligently detects sentence boundaries using punctuation marks (. ! ?) and preserves proper casing for the first word only. Perfect for fixing all-caps text, cleaning up messy copy, formatting article drafts, and preparing content for publication. All processing runs in your browser.
Features of Our Sentence Case Converter
- Convert to proper sentence case
- Intelligent sentence boundary detection
- First letter of each sentence capitalized
- Rest of text lowercased
- Handles periods, exclamation marks, question marks
- Real-time preview
- 100% private — browser-only processing
How to Use the Sentence Case Converter
The Sentence Case Converter works right in your browser — no signup, no installation. Follow these steps:
- Paste or type your text into the input area.
- The text is automatically converted to sentence case.
- Review the output to ensure proper sentence detection.
- Copy the converted text.
Frequently Asked Questions About Sentence Case Converter
How does the tool detect sentence boundaries?
It detects sentences by looking for periods, exclamation marks, and question marks followed by a space or end of text.
Does it handle abbreviations?
Common abbreviations like "Dr." and "Mr." are handled to prevent false sentence breaks.
Why Choose the Sentence Case Converter?
Converting data should be quick and lossless. The Sentence Case Converter transforms your input the instant you paste it, handles edge cases cleanly, and does all the work in your browser — so there is no upload, no waiting, and no copy of your data on a server somewhere.