Sentence Case Converter
Convert text to sentence case, capitalizing only the first letter of each sentence.
A sentence case converter capitalizes only the first letter of each sentence while leaving the rest lowercase, which is the standard for body text.
How to Use the Sentence Case Converter
- Paste your text. Enter the text to convert.
- Copy the result. See the sentence-cased version instantly.
This tool processes your input locally in your browser. Nothing is uploaded.
What Is Sentence Case?
A sentence case converter capitalizes the first letter of each sentence and lowercases the rest, matching how body copy is normally written.
What is sentence case?
Sentence case means only the first word of each sentence (and proper nouns) is capitalized. This is the standard for paragraphs and most web content.
Sentence case vs title case
Sentence case is used for body text; title case is used for headings and titles. Converting between them helps keep your content consistent.
Key Features
- Capitalizes sentence starts
- Lowercases the rest
- Instant conversion
Examples
- "THIS IS THE FIRST SENTENCE. AND THIS IS THE SECOND ONE." becomes "This is the first sentence. And this is the second one."
Common Use Cases
- Formatting body text
- Fixing all-caps content
- Standardizing copy
Tips & Best Practices
- Keep proper nouns capitalized manually, as automation cannot detect them reliably.
Limitations
- Does not reliably preserve proper nouns.
Related Tools
Related Articles
Uppercase Converter – Complete Guide & Free Online Tool An uppercase converter turns every letter in your text into a capital letter. Use it for headings, acronyms, code constants or emphasis. Free online tool included. Read guide → Lowercase Converter – Complete Guide & Free Online Tool A lowercase converter turns every letter in your text into lowercase. Use it to normalize content or fix an accidentally-caps-lock block of text. Free online tool included. Read guide → Title Case Converter – Complete Guide & Free Online Tool A title case converter capitalizes the important words in your text and keeps small words like "and", "or" and "the" lowercase, following common title conventions. Free online tool included. Read guide → Sentence Case Converter – Complete Guide & Free Online Tool A sentence case converter capitalizes only the first letter of each sentence while leaving the rest lowercase, which is the standard for body text. Free online tool included. Read guide →
Frequently Asked Questions
What is sentence case?
Only the first letter of each sentence is capitalized, and the rest is lowercase.
Will it keep proper nouns capitalized?
No, automation cannot reliably detect proper nouns, so check them manually.
Is it free?
Yes, and it runs locally in your browser.