How to use the Case Converter

Paste or type your text in the left panel.
Click any case button, the converted text appears on the right instantly.
Use Copy to copy the result, Swap to move the output back to input.

Case formats explained

Format	Example	Common uses
UPPER CASE	`HELLO WORLD`	Headings, constants, emphasis
lower case	`hello world`	General text, email addresses
Title Case	`Hello World`	Article titles, headings
Sentence case	`Hello world`	Normal prose, UI copy
camelCase	`helloWorld`	JavaScript variables, JSON keys
PascalCase	`HelloWorld`	Classes, React components, C# types
snake_case	`hello_world`	Python variables, database columns
kebab-case	`hello-world`	CSS classes, URL slugs, HTML attributes
CONSTANT_CASE	`HELLO_WORLD`	Environment variables, constants

Which case to use where?

Naming conventions vary by language and context. Consistency within a codebase matters more than which convention you choose, mixing styles makes code harder to read.

JavaScript: camelCase for variables and functions, PascalCase for classes and React components, CONSTANT_CASE for module-level constants
Python: snake_case for variables and functions, PascalCase for classes, CONSTANT_CASE for module constants
CSS / HTML: kebab-case for class names, IDs, and custom properties (--my-variable)
SQL: snake_case for table and column names
URLs: kebab-case for readability and SEO