Case Converter

在不同大小写之间转换文本。

结果

8 Case Types

UPPER, lower, Title, Sentence, camelCase, PascalCase, snake_case, kebab-case.

Real-time

Convert as you type — no button needed.

Copy Result

One-click copy to clipboard.

Client-side

All processing in your browser. No data uploaded.

关于Case Converter

Text case conversion is a frequent task for developers, copywriters, and data professionals. Different contexts demand different casing styles: programming languages use camelCase, PascalCase, snake_case, or kebab-case for identifiers; editorial content requires Title Case or Sentence case; and data cleaning often needs bulk uppercase or lowercase conversion. This Case Converter tool supports eight distinct transformations in one place. UPPER CASE turns every letter into capitals — useful for headings or constants. lower case does the opposite. Title Case capitalises the first letter of every word. Sentence case capitalises only the first word of each sentence. camelCase joins words with no separator, capitalising each word after the first — the standard in JavaScript. PascalCase does the same but capitalises the first word too — common in class names. snake_case uses underscores and is the convention in Python and databases. kebab-case uses hyphens and is standard in CSS and URLs. Conversion happens as you type so you can preview the result instantly.

如何使用Case Converter

Type or paste your text into the input field.
Click one of the eight case buttons to select the conversion format.
The converted text appears immediately in the output field below.
Click a different case button at any time to switch formats without re-typing.
Click "Copy" to copy the converted text to your clipboard.

常见问题

What is camelCase used for?

camelCase is the standard naming convention for variables and functions in JavaScript, Java, and many other languages. The first word is lowercase and each subsequent word starts with a capital letter, e.g., myVariableName.

What is the difference between PascalCase and camelCase?

Both join words without spaces and capitalise each word, but PascalCase also capitalises the very first word. PascalCase is commonly used for class names and components (e.g., MyComponent), while camelCase is used for variables and functions (e.g., myComponent).

When should I use snake_case vs kebab-case?

Use snake_case for variable and function names in Python, Ruby, and SQL column names. Use kebab-case for CSS class names, HTML attributes, and URL slugs, since hyphens are more readable in those contexts and do not require escaping.

Can this tool convert mixed-format input?

Yes. The converter intelligently detects word boundaries in camelCase, PascalCase, snake_case, and kebab-case inputs, so you can convert between any formats without manually inserting spaces first.

Does it handle multi-line text?

Yes. The conversion is applied to the entire input, including text across multiple lines. Each line is processed independently, preserving the original line breaks in the output.