camelCase Converter Convert text to camelCase for JavaScript variables and function names.
camelCase Converter
Convert text to camelCase for JavaScript variables and function names.
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Paste text, variable names, or phrases to convert.
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See your text converted to camelCase format instantly.
Copy & Use
Copy the camelCase result for use in your code.
What Is camelCase Converter?
A camelCase converter transforms any text into camelCase format, where the first word is lowercase and each subsequent word starts with a capital letter, with no spaces or separators. Developers who work with JavaScript, TypeScript, Java, and other programming languages use it to adhere to standard naming conventions for variables and functions. One specific problem it solves is converting user input or existing text data into a format that can be used directly in code, eliminating the need for manual editing.
The tool handles input in any format — spaces, hyphens, underscores, or mixed case — and produces clean camelCase output. For example, "hello world" becomes "helloWorld", "user-first-name" becomes "userFirstName". What makes this tool different is its ability to split words based on specific patterns, such as replacing certain characters with spaces, trimming the input string, and filtering out empty words.
It uses a custom function called `splitWords` to achieve this, which replaces characters like underscores, hyphens, and periods with spaces, then splits the string into individual words. The `onProcess` function then takes these words and converts them to camelCase by lowercasing the first word and uppercasing the first letter of each subsequent word. This allows developers to easily convert text to camelCase for use in their code, following standard JavaScript variable naming conventions.
Why Use camelCase Converter?
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Standard naming convention for JavaScript/TypeScript variables and functions
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Handles any input format — spaces, hyphens, underscores, or mixed case
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Essential for maintaining code style consistency
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Converts multiple lines for batch processing
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Saves time when renaming variables or converting text to code identifiers
Common Use Cases
JavaScript Development
Convert descriptions or database column names to camelCase for JavaScript variables and functions.
API Integration
Transform snake_case API response keys to camelCase for frontend JavaScript code.
Code Refactoring
Batch rename variables from one naming convention to camelCase.
CSS-in-JS
Turn CSS property names (kebab-case) into camelCase for styled-components or React inline styles.
Technical Guide
camelCase conversion follows these steps: (1) Split the input into words using separators including spaces, hyphens, underscores, dots, and case transitions (detecting where lowercase meets uppercase). (2) Convert the first word entirely to lowercase. (3) For subsequent words, capitalize the first letter and lowercase the rest. (4) Join all words without separators. The regex-based splitting handles transitions like "XMLParser" → ["XML", "Parser"] and "getElementById" → ["get", "Element", "By", "Id"]. Special characters and numbers are preserved when they appear within words. The result is always a valid JavaScript identifier (assuming the first character is a letter).
Tips & Best Practices
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1camelCase is the convention in JavaScript, TypeScript, Java, and C# for local variables
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2Function names in JavaScript should also use camelCase (e.g., getUserName)
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3React component props use camelCase (onClick, className, tabIndex)
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4When converting from snake_case, each underscore-separated word becomes a new camel hump
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5Acronyms in camelCase vary by convention: xmlHttpRequest vs XMLHttpRequest
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📝 Text ToolsFrequently Asked Questions
Q What is camelCase?
Q What's the difference between camelCase and PascalCase?
Q Which languages use camelCase?
Q How are acronyms handled?
Q Can I convert multiple lines at once?
About This Tool
camelCase Converter is a free online tool by FreeToolkit.ai. All processing happens directly in your browser — your data never leaves your device. No registration or installation required.