ConvertCase.co

Sentence Case Converter

Converts text to Sentence case. The first letter of the first word in each sentence is capitalized.

Characters: 0Words: 0Sentences: 0Lines: 0Paragraphs: 0

What Is Sentence Case?

Sentence case is the most common and natural way we write. It means capitalizing only the first letter of the first word in a sentence, while leaving the rest in lowercase — unless a word is a proper noun (like names or cities). For example:

Input:
tHiS is A tEsT SENTENCE. here is ANOTHER.

Output:
This is a test sentence. Here is another.

When Should You Use Sentence Case?

  • ✔️ To fix randomly capitalized or poorly formatted text
  • ✔️ When writing paragraphs, articles, or documentation
  • ✔️ For emails, blog posts, and essays
  • ✔️ To prepare content for publishing platforms that require sentence-style formatting

Why Use This Tool?

  • ✔️ Saves time formatting text manually
  • ✔️ Makes content more professional and readable
  • ✔️ Ideal for content writers, students, and editors
  • ✔️ Supports multiple languages and Unicode characters

How Is It Different from Capitalized Case?

In Sentence Case, only the first word of each sentence is capitalized:

Sentence Case: This is an example.
Capitalized Case: This Is An Example.

Pro Tip 💡

This tool won’t automatically detect proper nouns, so double-check names like London, NASA, or John before publishing.

How to Use Case Converter

Easily convert your text into various case formats, including UPPER CASE, lower case, Sentence case, and more with ConvertCase.co.

  1. Start typing or paste your text into the provided text area.
  2. Use the Open file button if you want to load text directly from a file.
  3. Select the desired case format (e.g., Sentence case, UPPER CASE, camelCase) from the available options.
  4. Your text will automatically convert to the chosen case format.
  5. Click the Copy button to copy the formatted text to your clipboard.
  6. Click Download to save your converted text as a file.
  7. Use the Clear button to reset the text area and start over.

Why Choose ConvertCase.co?

Whether you're writing blog posts, coding, formatting documents, or just need quick text transformations, ConvertCase.co offers a powerful, all-in-one toolkit designed to save you time and effort.

Key Features:
  • 15+ Case Converters – Instantly switch between Sentence Case, UPPER CASE, camelCase, snake_case, PascalCase, Hashtag Case, and more.
  • Fast and Lightweight – Everything runs in your browser with no lag, loading bars, or page refreshes.
  • Easy Text Input – Type directly, paste from clipboard, or upload supported file types like .txt, .md, or .json.
  • Quick Export Options – Copy to clipboard or download your edited text instantly as a file.
  • User-Friendly UI – Clean, minimal interface designed for writers, developers, students, teachers, and everyday users alike.
  • 100% Free to Use – No registration, subscriptions, or limits — just open and use.
  • Dark Mode Friendly – Enjoy a comfortable reading experience whether you’re working day or night.