Case Converter

Why I Built This Case Converter

As a developer, I constantly switch between different naming conventions depending on what I'm working on. JavaScript variables use camelCase, Python prefers snake_case, CSS classes often use kebab-case, and constants are SCREAMING_SNAKE_CASE. I got tired of manually retyping text in different formats, so I built this tool to handle all the common cases (pun intended) instantly.

When I Actually Use Case Conversion

• Refactoring Code - When moving code between languages with different conventions, like Python to JavaScript
• API Development - Converting database column names (snake_case) to JSON response fields (camelCase)
• CSS Class Names - Transforming component names to BEM-style kebab-case classes
• Environment Variables - Converting config names to CONSTANT_CASE for .env files
• Documentation - Making headings and titles consistent with proper Title Case

Understanding Different Case Styles

Each case style has its place in software development. Here's a quick breakdown of when to use each one, based on my experience across different projects and languages.

Programming Case Styles

• camelCase - The standard for JavaScript, Java, and TypeScript variables and functions. First word lowercase, rest capitalized.
• PascalCase - Used for classes, types, and React components. Every word starts with a capital letter.
• snake_case - Python's preferred style and common in databases. Words separated by underscores, all lowercase.
• kebab-case - Perfect for URLs, CSS classes, and file names. Words separated by hyphens, all lowercase.
• CONSTANT_CASE - Reserved for constants and environment variables. All caps with underscores.

Text Formatting Styles

• Title Case - Capitalizes The First Letter Of Each Word. Great for headings and titles.
• Sentence case - Only the first letter of the first word is capitalized. Standard for paragraphs.
• UPPERCASE - All letters capitalized. Use sparingly - it looks like shouting!
• lowercase - All letters in lowercase. Often used for normalization.

This tool works great alongside the JSON Formatter when cleaning up API responses, and the Regex Tester when building patterns for case-insensitive matching.

Related Articles

• Naming Conventions: The Complete Guide to Case Styles in Programming
• URL Slugs: Best Practices for SEO-Friendly URLs

Frequently Asked Questions

What is camelCase and when should I use it?

camelCase is probably the naming convention I use most often. The first word is lowercase, and every following word starts with a capital letter - like myVariableName or getUserById. It's the standard in JavaScript, TypeScript, and Java for variables and function names. Most style guides will enforce it, so it's worth getting comfortable with.

What is the difference between snake_case and kebab-case?

Both keep everything lowercase and separate words, but snake_case uses underscores while kebab-case uses hyphens. I use snake_case in Python code and database columns, and kebab-case for CSS classes and URLs. The main reason for kebab-case in URLs is that hyphens are treated as word separators by search engines, which is better for SEO.

What is PascalCase used for?

PascalCase is like camelCase but with the first letter also capitalized - MyClassName instead of myClassName. I use it exclusively for class names, TypeScript types and interfaces, and React component names. It helps visually distinguish types and classes from regular variables.

What is CONSTANT_CASE?

CONSTANT_CASE is all uppercase with underscores between words, like MAX_RETRY_COUNT or API_BASE_URL. I use it for values that should never change - true constants. Most languages don't actually enforce immutability with this naming, but it's a strong signal to other developers that this value shouldn't be modified.