Sentence Case Converter
Paste ALL-CAPS or mixed-case text and click Convert to apply sentence case — first letter of each sentence capitalised, rest lowercase.
100% in your browser. Your file never leaves your device.
Type or paste text above.
How to use
- Paste or type your text into the input box.
- Click Convert to Sentence Case.
- The first letter of each sentence is capitalised; all others are lowercased. Line breaks are preserved.
When to use sentence case
Sentence case is the standard for body copy, email subjects, and most UI text. It reads more naturally than Title Case in running paragraphs. Use the Title Capitalizer when you need AP, APA, or Chicago title case for headings instead.
Related writing tools
- Title Capitalizer — AP, APA, and Chicago title case
- Word Counter — count words and sentences in your text
- Double Space Remover — clean up extra spaces
Frequently Asked Questions
- Is this sentence case converter free?
- Yes, completely free with no signup and no usage limits.
- Does my text leave my device?
- No. All processing runs in JavaScript inside your browser. Nothing is sent to any server.
- Does it work on mobile?
- Yes. The tool is mobile-first and works on iPhone Safari and Android Chrome.