CamelCase Converter

Convert any text to camelCase format. Used for JavaScript variables, JSON keys, and programming identifiers.

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What Is CamelCase?

CamelCase is a naming convention where each word begins with a capital letter and no spaces or separators are used. There are two variants: lowerCamelCase (first word lowercase, e.g. myVariableName) and UpperCamelCase or PascalCase (all words capitalized, e.g. MyClassName).

CamelCase vs Other Naming Conventions

camelCase: myVariableName — JavaScript, Java, TypeScript variables
PascalCase: MyClassName — C# classes, React components
snake_case: my_variable_name — Python, Ruby, databases
kebab-case: my-variable-name — URLs, CSS classes, HTML attributes

How to Convert underscore_case to camelCase

Converting snake_case (underscore notation) to camelCase is essential when working across Python and JavaScript codebases. The algorithm removes each underscore and capitalizes the following letter:

user_first_name → userFirstName
get_user_by_id → getUserById
api_base_url → apiBaseUrl

This conversion is common when consuming Python or Ruby APIs from a JavaScript frontend, or when migrating database column names into JSON response keys.

camelCase vs PascalCase

Convention	Example	First Letter	Common Usage
camelCase	`myVariable`	lowercase	JS/TS variables, JSON keys
PascalCase	`MyVariable`	uppercase	Classes, React components

Where to Use CamelCase

JavaScript and TypeScript variable and function names
Java method and variable names
JSON object keys in many APIs
Swift and Kotlin identifiers
Go exported identifiers (PascalCase)
React state variables and event handlers
C# local variables and method parameters
GraphQL field names

Related Tools

Convert to Python-style naming with the Snake Case Converter. For URL-friendly formats, try the Kebab Case Converter. For all formats at once, use the Case Converter Online.