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Case Converter: Change Upper and Lower Case

Turn text into UPPERCASE, lowercase, Title Case, or a code format such as camelCase and snake_case in one click. Title Case keeps short English words like “of” and “the” in lowercase.

Free · no sign-up · runs in your browser · updated

Use Case Converter

How to use Case Converter

  1. Paste or type your text into the input box.

  2. Choose the format you want: uppercase, lowercase, Title Case, Sentence case, or a code naming style.

  3. Copy the result, or click “Use as input” to chain several conversions one after another.

When to use each format

UPPERCASE suits emphasis and abbreviations. Title Case works for article headlines and product names. Sentence case is for ordinary sentences, for example when text came out in all capitals because Caps Lock was on.

For programmers: camelCase and PascalCase are common for variables and class names, snake_case for Python and database column names, kebab-case for URLs and CSS classes, and CONSTANT_CASE for constants.

Questions about Case Converter

What is Title Case, and what are its rules in English?

Title Case capitalizes the first letter of each important word. In English style guides, short articles, conjunctions and prepositions such as a, an, the, and, of, in and to stay lowercase unless they begin or end the title. This tool follows those rules.

What is the difference between camelCase and PascalCase?

Both join words without separators and capitalize each following word. The difference is that camelCase starts with a lowercase letter (userName), while PascalCase starts with a capital letter (UserName).

Are accented letters converted too?

Yes. The conversion uses your browser’s built-in functions, so letters such as é and ü change correctly.

What happens to symbols and numbers?

In the uppercase and lowercase formats, symbols and numbers are left alone. In code formats such as snake_case, symbols are removed or replaced by the separator so the result is valid as a name.

Is my text stored?

No. All conversion happens in your browser.

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