Sentence Case Converter

Summary

The Sentence Case Converter transforms any block of text so that each sentence starts with a capital letter and all remaining letters are lowercase. It correctly handles periods, exclamation marks, and question marks as sentence boundaries. Ideal for cleaning up ALL-CAPS text, normalizing pasted content, or fixing inconsistent capitalization.

How it works

1. Paste or type your text into the input box.
2. The tool splits the text into sentences using punctuation boundaries (., !, ?).
3. The first letter of each sentence is uppercased; all other letters are lowercased.
4. The converted text appears instantly in the output box.
5. Click "Copy Result" to copy the output to your clipboard.

Use cases

• Normalize ALL-CAPS or randomly capitalized text.
• Fix copy-pasted content from PDFs or legacy documents.
• Prepare drafts where consistent sentence capitalization is required.
• Clean up social media or chat exports before repurposing them.
• Convert title case or camel-case blobs back to readable sentences.
• Quickly fix autocorrect mistakes that capitalized mid-sentence words.

Frequently Asked Questions