Variable Name Converter

Convert between 5 programming naming conventions instantly

Free online tool to convert variable names between camelCase, snake_case, PascalCase, kebab-case, and SCREAMING_SNAKE_CASE. Perfect for refactoring, code migration, and following style guidelines.

How to Use

Enter Variable Name
Type or paste your variable name in any format (e.g., userProfileData, user_profile_data).
View Results Instantly
See real-time conversion to all 5 naming conventions. The tool auto-detects your input format.
Copy & Use
Click the copy button next to any result to copy it to your clipboard.

All conversions happen in your browser. Your data is never sent to any server.

Convert Variable Name

Conversion Results

Detected Format: -

camelCase

snake_case

PascalCase

kebab-case

SCREAMING_SNAKE_CASE

Enter Variable Name

0 / 200 characters

Programming Language (Optional)

Practical Use Cases

1. Code Refactoring

Quickly convert variable names when migrating code between projects with different style guides (e.g., Python to JavaScript).

2. Style Guide Compliance

Ensure your code follows team conventions by converting to the correct naming format for your language.

3. API Integration

Convert between snake_case (common in Python/Ruby APIs) and camelCase (common in JavaScript/Java) when working with different APIs.

4. Database Column Names

Convert camelCase object properties to snake_case database column names or vice versa.

5. Environment Variables

Convert regular variable names to SCREAMING_SNAKE_CASE for environment variable constants.

6. Learning and Education

Understand how different naming conventions work by seeing real-time examples and language-specific recommendations.

What is Variable Name Converter?

A Variable Name Converter is a developer tool that transforms variable names between different programming naming conventions. Each programming language and style guide has its own preferred naming convention, and this tool helps you seamlessly convert between them.

Supported Naming Conventions

camelCase: First word lowercase, capitalize subsequent words (e.g., userProfileData). Standard in JavaScript, Java, C#.
snake_case: All lowercase with underscores (e.g., user_profile_data). Standard in Python, Ruby, Rust.
PascalCase: Capitalize all words, no separators (e.g., UserProfileData). Used for classes in Java, C#, JavaScript.
kebab-case: All lowercase with hyphens (e.g., user-profile-data). Common in CSS, HTML attributes, URL slugs.
SCREAMING_SNAKE_CASE: All uppercase with underscores (e.g., USER_PROFILE_DATA). Used for constants and environment variables.

Why Use a Variable Name Converter?

When working across multiple programming languages or refactoring code, manually converting naming conventions is tedious and error-prone. This tool automates the process, detects your current format, and provides instant conversions to all major conventions. It also offers language-specific recommendations based on industry-standard style guides (PEP 8 for Python, Google Style Guide for JavaScript, etc.).

Frequently Asked Questions

How does the auto-detection work?

The converter analyzes your input for patterns like underscores, hyphens, and capitalization to identify the current naming format. It recognizes all 5 major conventions with over 90% accuracy.

What happens to numbers in variable names?

Numbers are preserved in their original position. For example, 'userData2' converts to 'user_data2', 'UserData2', 'user-data2', or 'USER_DATA2' depending on the target format.

How are acronyms handled?

Acronyms are treated as regular words and split accordingly. For example, 'HTTPSConnection' is split into 'https' and 'connection', converting to 'https_connection' (snake_case), 'httpsConnection' (camelCase), etc.

Can I convert multiple variables at once?

Currently, the tool converts one variable name at a time for accuracy. For batch conversion, you can use the tool multiple times or integrate our conversion logic into your own scripts.

Is my data sent to a server?

No. All conversions happen entirely in your browser using JavaScript. Your variable names never leave your device, ensuring complete privacy.

What's the maximum input length?

The tool supports variable names up to 200 characters. A warning appears if you exceed 50 characters (the recommended maximum for most style guides).

Which programming language should I select?

Select your target language to see its recommended naming convention (e.g., Python recommends snake_case). This is optional but helpful for learning best practices.

Can I use special characters in variable names?

The tool automatically removes special characters except letters, numbers, hyphens, and underscores, as these are the only characters allowed in most programming language identifiers.