About this tool
Free Online Text Case Converter
Convert text between any case format instantly — UPPERCASE, lowercase, Title Case, Sentence case, camelCase, PascalCase, snake_case, kebab-case, and SCREAMING_SNAKE_CASE. Paste your text, click a format, and copy the result. All conversion runs in your browser.
Case Formats and When to Use Them
- camelCase — first word lowercase, subsequent words capitalized, no separators. Standard for JavaScript/Java variables and functions:
getUserById
- PascalCase — every word capitalized, no separators. Used for classes and React components:
UserProfile
- snake_case — words separated by underscores, all lowercase. Standard in Python, Ruby, and database column names:
user_first_name
- SCREAMING_SNAKE_CASE — snake_case in all caps. Used for constants and environment variables:
MAX_RETRY_COUNT
- kebab-case — words separated by hyphens, all lowercase. Used in URLs, CSS class names, HTML attributes:
primary-button
- Title Case — major words capitalized. Used for headings and article titles
- Sentence case — only the first word capitalized. Standard for body text and UI labels
What is the difference between camelCase and PascalCase?
Both concatenate words without separators. camelCase starts with a lowercase letter (myVariable). PascalCase starts with uppercase (MyVariable). Most languages use camelCase for variables/functions and PascalCase for classes/types.
When should I use snake_case vs kebab-case?
snake_case (underscores) is standard in Python, Ruby, and SQL. kebab-case (hyphens) is standard in URLs, CSS, and HTML. Never use kebab-case in JavaScript variable names — the hyphen is the subtraction operator.
Does this handle acronyms like URL, ID, or API correctly?
Yes. Common acronyms are treated as single words so getUserID converts to get_user_id (not get_user_i_d) in snake_case.