camelCase, snake_case & kebab-case Converter — Free Online Developer Tool

A developer case converter transforms identifiers between camelCase, snake_case, kebab-case, PascalCase, and CONSTANT_CASE instantly. Paste a variable name in any format, click the target convention, copy the result. No regex, no manual editing, no typos.

Developer Case Conventions by Language

Language / Context	Variables	Functions	Classes / Components	Constants	Files / URLs
JavaScript / TypeScript	camelCase	camelCase	PascalCase	CONSTANT_CASE	kebab-case
Python	snake_case	snake_case	PascalCase	CONSTANT_CASE	snake_case
Ruby	snake_case	snake_case	PascalCase	CONSTANT_CASE	snake_case
Java	camelCase	camelCase	PascalCase	CONSTANT_CASE	PascalCase
C#	camelCase	PascalCase	PascalCase	CONSTANT_CASE	PascalCase
Go	camelCase	PascalCase (exported)	PascalCase	camelCase	snake_case
Rust	snake_case	snake_case	PascalCase	CONSTANT_CASE	snake_case
CSS	—	—	—	—	kebab-case
HTML attributes	—	—	—	—	kebab-case
URLs / slugs	—	—	—	—	kebab-case
Env variables	—	—	—	CONSTANT_CASE	—
Database columns	snake_case	—	—	—	—

Convert Developer Case — 3 Steps

1. Open Case Converter
2. Paste your identifier — getUserProfile, get_user_profile, get-user-profile, or plain "get user profile"
3. Click the target format and copy

Conversion Examples

Input	camelCase	snake_case	kebab-case	PascalCase	CONSTANT_CASE
user profile card	userProfileCard	user_profile_card	user-profile-card	UserProfileCard	USER_PROFILE_CARD
getUserData	getUserData	get_user_data	get-user-data	GetUserData	GET_USER_DATA
max_retry_count	maxRetryCount	max_retry_count	max-retry-count	MaxRetryCount	MAX_RETRY_COUNT
background-color	backgroundColor	background_color	background-color	BackgroundColor	BACKGROUND_COLOR
API_BASE_URL	apiBaseUrl	api_base_url	api-base-url	ApiBaseUrl	API_BASE_URL

Real Developer Scenarios

Migrating JavaScript to Python

Your JavaScript codebase uses camelCase: getUserProfile, updateCartItems, fetchOrderHistory. Python convention is snake_case: get_user_profile, update_cart_items, fetch_order_history. Paste each name and click snake_case instead of manually inserting underscores and lowercasing.

Formatting API Response Keys

An API returns snake_case JSON keys (user_name, created_at, is_active) but your React frontend uses camelCase (userName, createdAt, isActive). Convert the key names instantly for your mapping layer, or vice versa when building API request payloads.

Creating CSS Class Names From Component Names

Your React component is UserProfileCard (PascalCase). The CSS class should be user-profile-card (kebab-case). Paste the component name, click kebab-case, prefix with a dot in your stylesheet.

Generating URL Slugs From Titles

"How to Build a REST API" → kebab-case → "how-to-build-a-rest-api." Clean, URL-safe, SEO-friendly. No manual hyphenation.

Setting Up Environment Variables

Your config object has camelCase keys: databaseHost, apiSecretKey, maxConnectionPool. Environment variables use CONSTANT_CASE: DATABASE_HOST, API_SECRET_KEY, MAX_CONNECTION_POOL. Paste and convert instead of manually uppercasing and inserting underscores.

Why Manual Conversion Is Error-Prone

Converting "getUserAccountBalanceHistory" to snake_case manually means:

• Finding every uppercase letter (7 word boundaries)
• Inserting an underscore before each one
• Lowercasing the entire string
• Proofreading: did you catch "Balance" or did it become "balancehistory"?

One missed boundary creates a bug. One wrong underscore creates a different variable name. The converter handles it consistently every time: get_user_account_balance_history.

Developer Tool Chain

• Case Converter — camelCase, snake_case, kebab-case, PascalCase, CONSTANT_CASE
• JSON Formatter — pretty-print and validate JSON
• Code Formatter — auto-format JS, HTML, CSS, Python
• Code Minifier — minify JS, CSS, HTML
• Diff Checker — compare code side by side