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Type or paste any text into the input field. Works with variable names, sentences, titles, URLs, or any string you need to transform between different case styles.
See your text instantly transformed into 15 different case formats: camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE, Title Case, and more. All transformations update in real-time.
Click any transformed result to copy it to your clipboard. Each result box shows visual feedback when copied. No need to manually select and copy text.
Enable Batch Mode to process multiple lines at once. Each line is transformed independently, perfect for converting lists of variables, function names, or database columns.
Understanding text case transformations
Case conversion transforms text between different capitalization and word separation styles used across programming languages, naming conventions, and writing standards. Developers constantly convert between camelCase (JavaScript), snake_case (Python), PascalCase (C#), kebab-case (URLs), and CONSTANT_CASE (environment variables) when working across different codebases and platforms.
Each programming language and platform has strict naming conventions. JavaScript uses camelCase for variables and functions, PascalCase for classes and React components. Python uses snake_case for everything. CSS uses kebab-case for class names. Constants and environment variables use CONSTANT_CASE across all languages. Converting between these styles manually is tedious and error-prone.
Naming conventions aren't just style preferences - they're enforced by linters, rejected by code reviewers, and impact code readability and maintainability. When refactoring between languages (JavaScript to Python), migrating databases (SQL columns to MongoDB fields), or integrating APIs with different conventions, case conversion is essential.
Writing API integrations requires converting between API response keys (often snake_case from Python backends) and frontend variables (camelCase in JavaScript). Building CSS requires converting component names (PascalCase in React) to class names (kebab-case in stylesheets). Setting up environment variables requires converting config keys to CONSTANT_CASE format.
JavaScript/TypeScript: camelCase for variables/functions (getUserData), PascalCase for classes/components (UserProfile), CONSTANT_CASE for constants (MAX_RETRIES).
Python: snake_case for variables/functions/methods (get_user_data), PascalCase for classes (UserProfile), CONSTANT_CASE for constants (MAX_RETRIES).
Ruby: snake_case for variables/methods (get_user_data), PascalCase for classes (UserProfile), CONSTANT_CASE for constants.
Java/C#: camelCase for variables/methods (getUserData), PascalCase for classes (UserProfile), CONSTANT_CASE for constants.
Go: PascalCase for exported identifiers (GetUserData), camelCase for private (getUserData).
PHP: snake_case or camelCase depending on framework (Laravel uses snake_case, Symfony uses camelCase).
Database: snake_case for SQL table/column names (user_profiles, created_at), camelCase for MongoDB fields.
URLs/CSS: kebab-case for URLs (/user-profile), CSS classes (.user-profile), and filenames (user-profile.tsx).
Title Case: Capitalize major words for article titles, headings, and documentation. Follows grammar rules where small words (a, an, the, of, in) stay lowercase unless first word.
Sentence case: First word capitalized like normal sentences. Used in UI text, form labels, and user-facing content.
iNVERSE cASE / aLtErNaTe CaSe: Novelty cases for fun or artistic text. Inverse case flips upper to lower and vice versa. Alternate case alternates each character.
This tool handles all common programming conventions plus specialized transformations, making it a one-stop solution for any case conversion need. All processing happens instantly in your browser using JavaScript string methods and regex patterns.
How developers use case conversion
Backend APIs (Python/Ruby) use snake_case for JSON keys, but JavaScript frontends use camelCase. Convert API response keys to match JavaScript conventions when integrating third-party APIs or building API wrapper libraries.
React components use PascalCase naming, but CSS class names follow kebab-case convention. Convert component names to CSS class names when building stylesheets or CSS modules for React applications.
SQL databases use snake_case column names, but ORM models (Sequelize, TypeORM, Mongoose) use camelCase properties. Convert database column names when writing model definitions or migration files.
Application config keys (camelCase in code) need to be converted to CONSTANT_CASE for environment variables. Convert config property names when creating .env files or CI/CD configuration.
Master all 15 case transformations
This tool provides instant case conversion with 15 different transformation styles. Type once, see all conversions in real-time. Click any result to copy to clipboard. All processing happens client-side using JavaScript string methods.
Enter any text - variable names, function names, sentences, or mixed text. The tool instantly shows 15 transformations: camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE, dot.case, path/case, Title Case, Sentence case, lowercase, UPPERCASE, iNVERSE cASE, aLtErNaTe CaSe, SpOnGeBoB cAsE, and esreveR (reversed).
Enable "Batch Mode" to process multiple lines simultaneously. Each line is converted independently. Perfect for converting lists of variables, function names, or database columns. Paste a list, enable batch mode, and click any transformation to copy all results.
When batch mode is enabled, toggle "Preserve empty lines" to maintain blank lines in your input. Useful for preserving section separators or spacing in lists of variables.
Click "Copy All Results" to copy every transformation style to clipboard in formatted text. Useful for documentation or comparing all styles before choosing one.
camelCase: Remove special chars, lowercase first word, capitalize first letter of subsequent words, remove spaces. hello world → helloWorld.
PascalCase: Remove special chars, capitalize first letter of every word, remove spaces. hello world → HelloWorld.
snake_case: Lowercase, replace spaces with underscores, remove special chars. hello world → hello_world.
kebab-case: Lowercase, replace spaces with hyphens, remove special chars. hello world → hello-world.
CONSTANT_CASE: Uppercase, replace spaces with underscores, remove special chars. hello world → HELLO_WORLD.
Title Case: Capitalize first letter of major words, lowercase articles/prepositions (a, an, the, of, in, on, at, to) unless first word. the quick brown fox → The Quick Brown Fox.
Sentence case: Lowercase everything except first letter of sentences (after periods, question marks, exclamation points). hello world. another sentence → Hello world. Another sentence.
All transformations update on every keystroke - no need to click "Convert" button. Click any result box to instantly copy that transformation to clipboard.
Everything you need to know
Your data never leaves your browser
Your text never leaves your browser. This case converter operates entirely client-side using JavaScript's built-in string manipulation methods. Zero server uploads, zero data transmission, zero logging.
Safe for converting proprietary code, sensitive variable names, confidential configuration, or any internal naming conventions. Use with confidence for production code, customer data fields, or regulated system identifiers.
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