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Sentence Case Converter

Convert text to proper sentence case instantly. This free tool capitalizes the first letter of each sentence while keeping the rest lowercase. Perfect for fixing ALL CAPS text, cleaning copied content, and formatting paragraphs. All processing happens locally in your browser.

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Fixed Mode: sentence
0 characters 0 words

About This Tool

Fix messy text with proper sentence capitalization. Free and private.

When to Use

  • • Fixing text that was accidentally typed in all caps
  • • Cleaning up copied content with inconsistent capitalization
  • • Formatting paragraphs and body text for documents

Examples

  • Fix ALL CAPS

    Convert "THIS IS AN EXAMPLE." to "This is an example."

  • Multiple Sentences

    Convert "hello world. how are you?" to "Hello world. How are you?"

How to Convert to Sentence Case

1. Type or paste your text into the input area. The tool works with single sentences or multiple paragraphs.

2. The converter identifies sentence boundaries and capitalizes the first letter of each sentence.

3. Copy the formatted result with one click.

Frequently Asked Questions

Why is this sentence case converter free?
As a professional IT solutions company, our business relies on our core enterprise services, not ad revenue. Because this tool processes your text entirely locally on your own device, it costs us virtually nothing to host. We provide this as a high-quality, ad-free utility.
Do you store or collect my text?
No. Your text never leaves your device. This converter processes everything locally using browser-based JavaScript. No uploads. No server transfers. Your privacy is structurally guaranteed by how the tool is built.
How does sentence case differ from title case?
Sentence case capitalizes only the first letter of each sentence (and proper nouns). Title case capitalizes the first letter of major words in titles and headings. Sentence case is used for body text; title case is used for headings.
Does the tool handle multiple sentences?
Yes. The converter identifies sentence boundaries using periods, exclamation marks, and question marks, then capitalizes the first letter after each boundary.
What about proper nouns?
The basic sentence case conversion does not automatically identify proper nouns. You may need to manually capitalize names, places, and other proper nouns after conversion.

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