Case Converter

Convert your text instantly between uppercase, lowercase, title case and sentence case.

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How Case Converter works

Convert text to uppercase, lowercase, title case or sentence case using browser Unicode casing.

Steps

Paste text, choose one conversion, and copy or clear the output.

Example to check

The sentence-case option changes 'hello. WORLD' to 'Hello. World'. Title case capitalizes letters at word boundaries.

Limits and review

Capitalization follows simple rules. Names, abbreviations and language-specific title conventions may need manual correction. Languages without letter case will look unchanged.

Where your data goes

Text case conversion is performed locally in your browser using JavaScript. The conversion functions read the text field and display the result without sending the entered text to a conversion server. The page still loads its website files from the hosting provider.

How to Convert Text Case Correctly

Case Converter helps you change the capitalization of text without rewriting it manually. It supports uppercase, lowercase, title case and sentence case.

1. Uppercase Conversion

Uppercase changes letters to capital letters. For example, Hello World becomes HELLO WORLD. It can be useful for short labels and headings.

2. Lowercase Conversion

Lowercase converts capital letters into small letters. For example, HELLO WORLD becomes hello world. This is useful when standardizing text.

3. Title Case Conversion

Title case capitalizes the beginning of words according to the tool's character-boundary rules. For example, hello world becomes Hello World.

The converter also handles common contractions. For example, don't stop becomes Don't Stop.

This is a mechanical conversion, not a publishing style guide. Some editorial title styles keep short words such as "and" or "the" lowercase. Review important headings before publishing.

4. Sentence Case Conversion

Sentence case changes the text to lowercase and capitalizes the beginning of the text and text following sentence-ending punctuation.

For example, HELLO WORLD. HOW ARE YOU? becomes Hello world. How are you?.

Abbreviations such as Dr. and decimal numbers may require manual review because punctuation does not always indicate the end of a sentence.

5. How to Use the Tool

Enter or paste your text into the input field.
Select the capitalization style you need.
Review the converted text.
Use Copy Result to copy the output.
Use Clear when you want to start again.

6. Important Limitations

Capitalization is not the same as grammar correction. The converter does not rewrite sentences, translate languages or verify proper names.

Languages without uppercase and lowercase forms may remain unchanged. Language-specific casing rules can also require manual correction.

Privacy and Text Processing

The case transformations are performed using JavaScript in your browser. The conversion functions do not need to send the entered text to a server. Review sensitive text before copying it to other apps.

Related Learning Resources

Explore our Text and Data Guide for additional explanations about text processing, character counts and data formats.

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