Camel Case

Camel case joins multi-word identifiers with capitalized initials (e.g., userName or UserName); it is common in Java, JavaScript, and TypeScript.

Purpose

Provides a compact multi-word identifier naming style that stays readable in case-sensitive environments.

Mechanism

lowerCamelCase lowercases the first word and capitalizes the rest (userName); UpperCamelCase/PascalCase capitalizes every word (UserName). Java uses lower for methods and Upper for classes. JS/TS uses lower for variables and Upper for components/types.

Use cases

JavaScript/TypeScript variables and functions
Java method and class names
JSON key names (in some cases)
API field naming

Examples

Input
```
user_name
```
Output
```
userName
```
lowerCamelCase

Common errors

Confusing lowerCamelCase with UpperCamelCase: Follow language conventions: lower for variables, Upper for classes

Related terms

Snake case joins lowercase words with underscores (e.g., user_name); it is common in Python, database column names, and JSON.

Related tools

Convert text between upper, lower, title, camel, pascal, snake, kebab, constant, and sentence cases. Free, private, and 100% client-side.

Naming Convention Converter

Convert between camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE. Free, private, 100% client-side.

References