Case Converter
UPPER, lower, Title, camelCase, snake_case & more
About Case Converter
Text case conversion is something developers, writers and designers do constantly — renaming variables, fixing inconsistent heading capitalization, converting database column names to API fields. This free Case Converter handles UPPERCASE, lowercase, Title Case, Sentence case, camelCase, PascalCase, snake_case and kebab-case conversions instantly — saving you from manual find-and-replace or regex writing.
How to Use Case Converter
- 1Type or paste your text into the input box.
- 2Click the case button you want: UPPER, lower, Title, camelCase, snake_case, etc.
- 3The converted text appears instantly in the output area.
- 4Click "Copy" to copy the converted text to your clipboard.
Common Use Cases
Use snake_case for Python and database column names, camelCase for JavaScript variables, PascalCase for class names, and kebab-case for CSS and URL slugs.
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Frequently Asked Questions
What is the difference between camelCase and PascalCase?
In camelCase, the first word is lowercase and subsequent words start with uppercase: myVariableName. In PascalCase (also called UpperCamelCase), every word including the first starts with uppercase: MyClassName. In programming, camelCase is used for variables and functions (JavaScript, Java), while PascalCase is used for class names and components (React, C#).
When should I use snake_case vs kebab-case?
Use snake_case (words_separated_by_underscores) for: Python variable names, database column names, file names in Python projects, JSON keys in some APIs. Use kebab-case (words-separated-by-hyphens) for: CSS class names, HTML attributes, URL slugs, file names in web projects. Never use spaces in code identifiers.
What is Title Case?
Title Case capitalizes the first letter of every major word. Minor words like "a", "an", "the", "and", "but", "or" are typically not capitalized unless they are the first word. Example: "The Quick Brown Fox Jumps Over the Lazy Dog". Title Case is used for article titles, headings, book titles and product names.
What is Sentence case?
Sentence case capitalizes only the first letter of the first word and proper nouns, exactly like a normal sentence. Example: "The quick brown fox jumps over the lazy dog." It is commonly used for email subjects, social media posts, UI button labels and product descriptions in modern design.