Sentence Case Converter
A free online sentence case converter. Paste any text and the tool capitalizes only the first letter of each sentence, lowercasing everything else (except proper nouns, which you can adjust manually). Useful for fixing ALL CAPS rants, normalizing user-generated content, and prepping headlines that need sentence case.
How to Use the Sentence case Converter
Type or paste your text into the box above. The sentence case output appears instantly. Click the copy button to send the result to your clipboard.
Examples: HELLO WORLD. THIS IS A TEST. becomes Hello world. This is a test.. the QUICK brown fox. becomes The quick brown fox.. The tool detects sentence boundaries (periods, exclamation points, question marks) and capitalizes the first letter after each.
What Is Sentence case?
Sentence case capitalizes the first letter of each sentence and any proper nouns, leaving every other word lowercase. It is the default style in newspapers, modern app UIs, casual blog posts, and most academic citation reference titles. The full rules and examples live on the what is sentence case page.
When to Use Sentence case
Use sentence case for news headlines, modern UI copy (button labels, menu items, section headers), email subject lines, casual blog post titles, and APA-style reference list entries. For book titles, formal paper titles, and most marketing headlines, use title case instead.
Other Text Converters
For other text transformations: title case converter, sentence case, lowercase, UPPERCASE, camelCase, snake_case, dot.case, hyphenated (kebab-case), and invert case.
