String Case Converter

Convert between camelCase, snake_case, kebab-case, and 12+ naming conventions. Perfect for developers switching between languages and refactoring code.

12+ Formats
Smart Detection
Instant Results
Powered by orbit2x.com
|
0 characters

The Developer's Guide to String Case Conversion

Transform variable names, function identifiers, and code strings between 12+ naming conventions instantly. Essential for cross-language development, code refactoring, and maintaining consistent coding standards.

Understanding String Case Formats in Programming

String case conversion transforms text between different naming conventions used across programming languages, frameworks, and coding standards. Each language community has evolved specific preferences: JavaScript uses camelCase for variables, Python prefers snake_case, CSS requires kebab-case for class names, and constants typically use SCREAMING_SNAKE_CASE. Our converter handles all major formats automatically while preserving acronyms and handling edge cases intelligently.

How Smart Case Conversion Works:

  1. 1. Word Boundary Detection: Identifies where words start and end using capitals, underscores, hyphens, or spaces
  2. 2. Acronym Preservation: Keeps HTTP, XML, API together as single units rather than splitting into letters
  3. 3. Format Application: Applies target convention rules for capitalization and separators
  4. 4. Multi-Format Output: Generates all 12+ format variations simultaneously for comparison

Common Case Formats:

getUserData
camelCase - JavaScript, Java, TypeScript
GetUserData
PascalCase - C#, Classes, Components
get_user_data
snake_case - Python, Ruby, SQL
get-user-data
kebab-case - CSS, URLs, HTML

Why Multiple Formats Exist:

  • ✓ Language Constraints: Some languages don't allow hyphens in identifiers
  • ✓ Readability: Different formats optimize for different contexts
  • ✓ Community Standards: Each ecosystem evolved its own conventions
  • ✓ Tool Compatibility: Build tools and frameworks enforce specific styles

Naming Conventions By Programming Language

JavaScript & TypeScript

Variables & Functions: getUserProfile(), handleClick() Use camelCase for all variables and function names
Classes & Components: UserProfile, NavigationBar Use PascalCase for constructors and React components
Constants: MAX_RETRY_ATTEMPTS, API_BASE_URL Use SCREAMING_SNAKE_CASE for true constants
Private Fields: _internalCache, #privateField Prefix with underscore or use # for private members

Python

Functions & Variables: get_user_profile(), user_count Use snake_case for all functions and variables
Classes: UserProfile, DatabaseConnection Use PascalCase for class names per PEP 8
Constants: MAX_CONNECTIONS, DEFAULT_TIMEOUT Use SCREAMING_SNAKE_CASE for module-level constants
Private Methods: _internal_helper(), __private_method() Single or double underscore prefix for internal use

Go (Golang)

Exported Functions: GetUserProfile(), ProcessRequest() Use PascalCase for exported (public) identifiers
Private Functions: getUserProfile(), validateInput() Use camelCase for unexported (private) identifiers
Acronyms: HTTPServer, URLParser, userID Keep acronyms all caps when at start, otherwise lowercase

CSS & HTML

CSS Classes: .nav-menu-item, .user-profile-card Use kebab-case for all CSS class names
BEM Methodology: .block__element--modifier Combines kebab-case with double underscores/hyphens
Data Attributes: data-user-id, data-api-endpoint Use kebab-case for HTML data attributes

Database Naming Conventions

SQL Databases
user_profiles
created_at
is_active

PostgreSQL, MySQL use snake_case for tables and columns

MongoDB
userProfiles
createdAt
isActive

NoSQL databases often use camelCase for field names

GraphQL
getUserProfile
createUser
updatePost

GraphQL queries use camelCase for field names

Real-World Use Cases for Case Conversion

API Development

Frontend-Backend Translation:

Convert between JavaScript camelCase API responses and Python snake_case database columns

API: firstName → DB: first_name
REST Endpoint Naming:

Transform resource names to URL-friendly kebab-case paths

/api/user-profiles/{userId}
GraphQL Schema:

Maintain consistent camelCase naming across queries and mutations

query getUserProfile($userId: ID!)

Code Refactoring

Language Migration:

Convert variable names when porting code from one language to another

Python: user_count → JS: userCount
Style Guide Compliance:

Bulk convert legacy code to match new team coding standards

Old: UserName → New: user_name
Framework Updates:

Adapt naming when migrating between frameworks with different conventions

Vue: snake_case → React: camelCase

Industry-Specific Applications

Full-Stack Development
  • • Synchronize variable names across stack layers
  • • Convert ORM model fields to API responses
  • • Transform database schemas to GraphQL types
  • • Maintain consistency in microservices
DevOps & Configuration
  • • Convert config keys to environment variables
  • • Transform YAML keys to different formats
  • • Standardize Docker compose service names
  • • Format Kubernetes resource identifiers
Documentation & Testing
  • • Generate test case names from descriptions
  • • Create consistent API documentation
  • • Format code examples for tutorials
  • • Standardize technical writing samples

Complete Format Reference with Examples

camelCase

getUserData

First word lowercase, subsequent words capitalized

Best for: JavaScript, Java, TypeScript variables

PascalCase

GetUserData

All words capitalized, no separators

Best for: Classes, React components, C# methods

snake_case

get_user_data

All lowercase with underscores

Best for: Python, Ruby, SQL columns

SCREAMING_SNAKE_CASE

GET_USER_DATA

All uppercase with underscores

Best for: Constants, environment variables

kebab-case

get-user-data

All lowercase with hyphens

Best for: CSS classes, URLs, HTML attributes

SCREAMING-KEBAB-CASE

GET-USER-DATA

All uppercase with hyphens

Best for: HTTP headers (occasionally)

dot.case

get.user.data

Lowercase with dots as separators

Best for: Config keys, Java packages, namespaces

Train-Case

Get-User-Data

Capitalized words with hyphens

Best for: Document titles, HTTP headers

Title Case

Get User Data

Capitalized words with spaces

Best for: Headings, page titles, documentation

Sentence case

Get user data

Only first word capitalized

Best for: UI labels, error messages, tooltips

UPPERCASE

GET USER DATA

All characters capitalized

Best for: Emphasis, warnings, acronyms

lowercase

get user data

All characters lowercase

Best for: Simple text, search normalization

Best Practices for Naming Conventions

Consistency Guidelines

✓ Do This
  • • Match project conventions: Follow existing code style in the repository
  • • Use language standards: Adopt official style guides (PEP 8, Airbnb, etc.)
  • • Be consistent within context: Don't mix camelCase and snake_case in same module
  • • Document choices: Note naming conventions in README or style guide
  • • Automate enforcement: Use linters and formatters to maintain standards
✗ Avoid This
  • • Mixing conventions randomly: user_name and userName in same codebase
  • • Fighting language idioms: snake_case in JavaScript, camelCase in Python
  • • Ignoring team standards: Personal preference over agreed conventions
  • • Over-abbreviating: usrPrfDt instead of userProfileData
  • • Inconsistent acronyms: httpURL vs HTTPUrl vs HttpUrl

Acronym Handling

JavaScript/TypeScript Style
httpURL, xmlParser, apiEndpoint

Treat acronyms as single words, only capitalize first letter

Go (Golang) Style
HTTPURL, XMLParser, APIEndpoint

Keep acronyms all caps when at start of identifier

Python Style
http_url, xml_parser, api_endpoint

Treat acronyms as regular words in snake_case

Common Naming Pitfalls to Avoid

Technical Mistakes
  • • Using reserved keywords as identifiers
  • • Starting with numbers (invalid in most languages)
  • • Special characters that break syntax
  • • Unicode characters causing encoding issues
  • • Case-sensitive duplicates (user vs User)
Readability Issues
  • • Overly abbreviated names (usrMgr)
  • • Single letter variables outside loops
  • • Ambiguous names (data, info, temp)
  • • Inconsistent pluralization
  • • Misleading names that don't match behavior

How to Use the String Case Converter

Step-by-Step Guide

  1. 1
    Paste Your Text: Enter any variable name, function name, or text in any format
  2. 2
    Configure Options: Choose whether to preserve acronyms, split on numbers, or strip special characters
  3. 3
    View Detection: See the automatically detected format with confidence percentage
  4. 4
    Convert All Formats: Get instant results in all 12+ naming conventions simultaneously
  5. 5
    Copy or Download: Click any format card to copy, or download all results as text file

Conversion Examples

Example 1: API Response Field
Input: firstName
Database Column: first_name
CSS Class: first-name
Example 2: Component Name
Input: UserProfileCard
CSS Class: user-profile-card
File Name: user_profile_card.py
Example 3: Configuration Key
Input: database.connection.timeout
Environment Variable: DATABASE_CONNECTION_TIMEOUT
JavaScript: databaseConnectionTimeout

Frequently Asked Questions

What's the difference between camelCase and PascalCase?

camelCase starts with a lowercase letter (getUserData) while PascalCase starts with uppercase (GetUserData). camelCase is used for variables and functions in JavaScript/Java, while PascalCase is used for classes, constructors, and React components. Both formats capitalize subsequent words without separators.

Why does Python use snake_case instead of camelCase?

Python's official style guide (PEP 8) recommends snake_case for functions and variables because underscores make longer names more readable. The Python community values readability ("Readability counts" from the Zen of Python), and studies show snake_case is easier to scan quickly compared to camelCase in longer identifiers.

How should I handle acronyms like HTTP, API, or URL?

It depends on your language and style guide. JavaScript treats acronyms as single words (httpServer, apiKey), Go keeps them all caps (HTTPServer, APIKey), and Python uses lowercase in snake_case (http_server, api_key). Our converter has a "Preserve Acronyms" option that keeps consecutive capitals together as units rather than splitting them into individual letters.

When should I use kebab-case vs snake_case?

Use kebab-case for URLs, CSS class names, and HTML attributes because hyphens are valid in these contexts but don't interfere with word parsing. Use snake_case for programming identifiers in Python, Ruby, SQL, and other languages where underscores are conventional. Hyphens typically can't be used in variable names (they're interpreted as minus signs).

Can I convert multiple strings at once?

Yes, paste multiple lines in the input area and each line will be converted independently while maintaining the line structure. This is useful for bulk refactoring when you need to convert many variable names, CSV column headers, or configuration keys at once. Results maintain the same order as your input.

What does "Split on Numbers" option do?

This option treats numbers as word boundaries. With it enabled, "user2admin" becomes ["user", "2", "admin"]. With it disabled, "user2admin" stays as ["user2admin"]. Most code treats numbers as part of words (base64Encode, user123), but splitting can be useful for certain legacy naming patterns or when numbers denote versions/variants.

How accurate is the format detection?

Our detection algorithm analyzes patterns like capital letters, underscores, hyphens, and spaces to identify the input format with high accuracy. It provides a confidence percentage based on how clearly the text matches a specific pattern. Mixed formats or ambiguous inputs may show lower confidence, but conversion still works correctly by extracting words intelligently.

Is this tool free to use?

Yes, our string case converter is completely free with unlimited conversions. No registration, downloads, or hidden costs. You can convert as many strings as needed for personal or commercial projects. The tool runs entirely in your browser for privacy, with optional server-side processing for complex transformations.

Can I use this for refactoring production code?

Yes, but always review results before applying to production code. While our converter handles most cases correctly, naming involves context that tools can't fully understand (semantic meaning, domain terminology, existing conventions). Use it to quickly generate candidates, then review for accuracy, check for reserved keywords, and ensure names follow your team's specific standards.

Does the converter work with non-English characters?

Yes, our converter supports Unicode and handles international characters correctly. Names like "café_résumé" or "北京_用户" are processed properly, preserving accent marks and special characters unless you enable "Strip Special Chars" option. This is important for internationalized applications and multi-language codebases.

Related Developer Tools

HTML Entity Encoder

Convert special characters to HTML entities for safe rendering

JSON Formatter

Format, validate, and beautify JSON data structures

Base64 Encoder

Encode and decode Base64 strings for data transmission